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class="vector-toc-list"> <li id="toc-Encryption" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Encryption"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Encryption</span> </div> </a> <ul id="toc-Encryption-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" 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Available in 18 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-18" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">18 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Psi_(client_de_missatgeria_instant%C3%A0nia)" title="Psi (client de missatgeria instantània) – Catalan" lang="ca" hreflang="ca" data-title="Psi (client de missatgeria instantània)" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Psi_(program)" title="Psi (program) – Czech" lang="cs" hreflang="cs" data-title="Psi (program)" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Psi_(Instant_Messenger)" title="Psi (Instant Messenger) – German" lang="de" hreflang="de" data-title="Psi (Instant Messenger)" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/Psi_(%CF%80%CE%B5%CE%BB%CE%AC%CF%84%CE%B7%CF%82_%CE%AC%CE%BC%CE%B5%CF%83%CE%B7%CF%82_%CE%B5%CF%80%CE%B9%CE%BA%CE%BF%CE%B9%CE%BD%CF%89%CE%BD%CE%AF%CE%B1%CF%82)" title="Psi (πελάτης άμεσης επικοινωνίας) – Greek" lang="el" hreflang="el" data-title="Psi (πελάτης άμεσης επικοινωνίας)" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Psi_(cliente_de_mensajer%C3%ADa_instant%C3%A1nea)" title="Psi (cliente de mensajería instantánea) – Spanish" lang="es" hreflang="es" data-title="Psi (cliente de mensajería instantánea)" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Psi_(tujmesa%C4%9Dilo)" title="Psi (tujmesaĝilo) – Esperanto" lang="eo" hreflang="eo" data-title="Psi (tujmesaĝilo)" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Psi_(messagerie_instantan%C3%A9e)" title="Psi (messagerie instantanée) – French" lang="fr" hreflang="fr" data-title="Psi (messagerie instantanée)" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/Psi_(%EC%9D%B8%EC%8A%A4%ED%84%B4%ED%8A%B8_%EB%A9%94%EC%8B%A0%EC%A0%80)" title="Psi (인스턴트 메신저) – Korean" lang="ko" hreflang="ko" data-title="Psi (인스턴트 메신저)" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Psi_(software)" title="Psi (software) – Italian" lang="it" hreflang="it" data-title="Psi (software)" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Psi_(software)" title="Psi (software) – Dutch" lang="nl" hreflang="nl" data-title="Psi (software)" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Psi_(komunikator_internetowy)" title="Psi (komunikator internetowy) – Polish" lang="pl" hreflang="pl" data-title="Psi (komunikator internetowy)" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Psi_(mensageiro_instant%C3%A2neo)" title="Psi (mensageiro instantâneo) – Portuguese" lang="pt" hreflang="pt" data-title="Psi (mensageiro instantâneo)" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Psi_(instant_messaging_client)" title="Psi (instant messaging client) – Romanian" lang="ro" hreflang="ro" data-title="Psi (instant messaging client)" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/Psi" title="Psi – Russian" lang="ru" hreflang="ru" data-title="Psi" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Psi_(tietokoneohjelma)" title="Psi (tietokoneohjelma) – Finnish" lang="fi" hreflang="fi" data-title="Psi (tietokoneohjelma)" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Psi_(datorprogram)" title="Psi (datorprogram) – Swedish" lang="sv" hreflang="sv" data-title="Psi (datorprogram)" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/Psi" title="Psi – Ukrainian" lang="uk" hreflang="uk" data-title="Psi" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/Psi_(%E8%BB%9F%E4%BB%B6)" title="Psi (軟件) – Chinese" lang="zh" hreflang="zh" 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Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Psi%22+instant+messaging+client">"Psi" instant messaging client</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Psi%22+instant+messaging+client+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Psi%22+instant+messaging+client&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Psi%22+instant+messaging+client+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Psi%22+instant+messaging+client">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Psi%22+instant+messaging+client&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">January 2012</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">Psi</caption><tbody><tr><td colspan="2" class="infobox-image logo"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Psi_icon_new.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/07/Psi_icon_new.png/60px-Psi_icon_new.png" decoding="async" width="60" height="60" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/07/Psi_icon_new.png/90px-Psi_icon_new.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/07/Psi_icon_new.png/120px-Psi_icon_new.png 2x" data-file-width="128" data-file-height="128" /></a></span></td></tr><tr><td colspan="2" class="infobox-image logo"><style data-mw-deduplicate="TemplateStyles:r1214851843">.mw-parser-output .hidden-begin{box-sizing:border-box;width:100%;padding:5px;border:none;font-size:95%}.mw-parser-output .hidden-title{font-weight:bold;line-height:1.6;text-align:left}.mw-parser-output .hidden-content{text-align:left}@media all and (max-width:500px){.mw-parser-output .hidden-begin{width:auto!important;clear:none!important;float:none!important}}</style><div class="hidden-begin mw-collapsible mw-collapsed" style=""><div class="hidden-title skin-nightmode-reset-color" style="background:gainsboro;text-align:center">Screenshot</div><div class="hidden-content mw-collapsible-content" style="text-align:center"> <figure class="mw-default-size mw-halign-center" typeof="mw:File/Frameless"><a href="/wiki/File:Psi-0.11.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/28/Psi-0.11.png/220px-Psi-0.11.png" decoding="async" width="220" height="515" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/2/28/Psi-0.11.png 1.5x" data-file-width="225" data-file-height="527" /></a><figcaption></figcaption></figure><div class="infobox-caption"></div></div></div></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Developer(s)</a></th><td class="infobox-data">The Psi Team</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Initial release</th><td class="infobox-data">July 7, 2001<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr style="display: none;"><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_release_life_cycle" title="Software release life cycle">Stable release</a></th><td class="infobox-data"><div style="margin:0px;">1.5<sup id="cite_ref-wikidata-6e795ac17ee96216dea2c51b45f933c63a21453a-v18_2-0" class="reference"><a href="#cite_note-wikidata-6e795ac17ee96216dea2c51b45f933c63a21453a-v18-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q71393?uselang=en#P348" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span> / 6 September 2020<span class="noprint">; 4 years ago</span><span style="display:none"> (<span class="bday dtstart published updated">6 September 2020</span>)</span></div></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Repository_(version_control)" title="Repository (version control)">Repository</a></th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li><span class="url"><a rel="nofollow" class="external text" href="https://github.com/psi-im/psi">github<wbr />.com<wbr />/psi-im<wbr />/psi</a></span> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q71393#P1324" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></li></ul> </div></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Written in</th><td class="infobox-data"><a href="/wiki/C%2B%2B" title="C++">C++</a>, <a href="/wiki/Qt_(framework)" class="mw-redirect" title="Qt (framework)">Qt</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Operating_system" title="Operating system">Operating system</a></th><td class="infobox-data"><a href="/wiki/Unix-like" title="Unix-like">Unix-like</a>, <a href="/wiki/MacOS" title="MacOS">macOS</a>, <a href="/wiki/Microsoft_Windows" title="Microsoft Windows">Microsoft Windows</a>, <a href="/wiki/Haiku_(operating_system)" title="Haiku (operating system)">Haiku</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Available in</th><td class="infobox-data"><a href="/wiki/Chinese_language" title="Chinese language">Chinese</a>, <a href="/wiki/Czech_language" title="Czech language">Czech</a>, <a href="/wiki/English_language" title="English language">English</a>, <a href="/wiki/French_language" title="French language">French</a>, <a href="/wiki/German_language" title="German language">German</a>, <a href="/wiki/Macedonian_language" title="Macedonian language">Macedonian</a>, <a href="/wiki/Polish_language" title="Polish language">Polish</a>, <a href="/wiki/Portuguese_language" title="Portuguese language">Portuguese</a>, <a href="/wiki/Russian_language" title="Russian language">Russian</a>, <a href="/wiki/Spanish_language" title="Spanish language">Spanish</a>, <a href="/wiki/Ukrainian_language" title="Ukrainian language">Ukrainian</a>, <a href="/wiki/Vietnamese_language" title="Vietnamese language">Vietnamese</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data"><a href="/wiki/Instant_messaging" title="Instant messaging">Instant messaging</a> <a href="/wiki/Client_(computing)" title="Client (computing)">client</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/GNU_General_Public_License" title="GNU General Public License">GPL-2.0-or-later</a><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="https://psi-im.org/">psi-im<wbr />.org</a></span></td></tr></tbody></table> <p><b>Psi</b> is a <a href="/wiki/Free_software" title="Free software">free</a> <a href="/wiki/Instant_messaging" title="Instant messaging">instant messaging</a> <a href="/wiki/Client_(computing)" title="Client (computing)">client</a> for the <a href="/wiki/Extensible_Messaging_and_Presence_Protocol" class="mw-redirect" title="Extensible Messaging and Presence Protocol">XMPP</a> protocol (including such services as <a href="/wiki/Google_Talk" title="Google Talk">Google Talk</a><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>) which uses the <a href="/wiki/Qt_(framework)" class="mw-redirect" title="Qt (framework)">Qt</a> toolkit. It runs on <a href="/wiki/Linux" title="Linux">Linux</a> (and other <a href="/wiki/Unix-like" title="Unix-like">Unix-like</a> operating systems), <a href="/wiki/Microsoft_Windows" title="Microsoft Windows">Windows</a>, <a href="/wiki/MacOS" title="MacOS">macOS</a> and <a href="/wiki/OS/2" title="OS/2">OS/2</a><sup id="cite_ref-Psi/2_5-0" class="reference"><a href="#cite_note-Psi/2-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> (including <a href="/wiki/EComStation" title="EComStation">eComStation</a> and <a href="/wiki/ArcaOS" title="ArcaOS">ArcaOS</a>).<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p><p>User interface of program is very flexible in customization. For example, there are "multi windows" and "all in one" modes, support of different iconsets and themes. </p><p>Ready-to-install <a href="/wiki/Deb_(file_format)" title="Deb (file format)">deb</a> and <a href="/wiki/RPM_Package_Manager" title="RPM Package Manager">RPM</a> packages are available for many <a href="/wiki/Linux_distribution" title="Linux distribution">Linux distributions</a>. Successful ports of Psi were reported for <a href="/wiki/Haiku_(operating_system)" title="Haiku (operating system)">Haiku</a>,<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> <a href="/wiki/FreeBSD" title="FreeBSD">FreeBSD</a> and <a href="/wiki/Sun_Microsystems" title="Sun Microsystems">Sun</a> <a href="/wiki/Solaris_(operating_system)" class="mw-redirect" title="Solaris (operating system)">Solaris</a> operating systems. </p><p>Due to Psi's free/open-source nature, several <a href="/wiki/Fork_(software_development)" title="Fork (software development)">forks</a> have appeared, which occasionally contain features that may appear in future official Psi versions. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Project_name">Project name</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Psi_(instant_messaging_client)&action=edit&section=1" title="Edit section: Project name"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>'Psi' is the twenty-third letter of the <a href="/wiki/Greek_alphabet" title="Greek alphabet">Greek alphabet</a> (Ψ), which is used as the software's logo. </p> <div class="mw-heading mw-heading2"><h2 id="Mission_statement">Mission statement</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Psi_(instant_messaging_client)&action=edit&section=2" title="Edit section: Mission statement"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The goal of the Psi project is to create a powerful, yet easy-to-use XMPP client that tries to strictly adhere to the XMPP drafts and XMPP XEPs. This means that in most cases, Psi will not implement a feature unless there is an accepted standard for it in the XMPP community. Doing so ensures that Psi will be compatible, stable, and predictable. </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Psi_(instant_messaging_client)&action=edit&section=3" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The application was created by Justin Karneges and it began as a side project. At various points during its existence Karneges was paid to develop the codebase, during which Psi flourished. Typically however, the release cycle of Psi is relatively slow, but the client has always been seen by its fans as a very stable and powerful instant messaging client. Karneges left the project in late 2004 to pursue other endeavors.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> In 2002 Michail Pishchagin started hacking Qt code which later became libpsi library. Pishchagin joined the team in March 2003 and he is responsible for many large chunks in Psi code. </p><p>In November 2004, maintenance was taken over by Kevin Smith, a long-time contributor to the project. In 2009, Smith handed maintenance back to Karneges,<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> who also maintains Iris, the <a href="/wiki/Qt_(framework)" class="mw-redirect" title="Qt (framework)">Qt</a>/<a href="/wiki/C%2B%2B" title="C++">C++</a> XMPP library upon which Psi is based.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>Remko Tronçon started writing his custom patches for Psi in 2003, and became an official developer in May 2005. </p><p>In 2009 a Psi <a href="/wiki/Fork_(software_development)" title="Fork (software development)">fork</a> named <a rel="nofollow" class="external text" href="https://psi-plus.com">Psi+</a> was started. Project purposes are: implementation of new features, writing of <a href="/wiki/Patch_(computing)" title="Patch (computing)">patches</a> and plugins for transferring them to <a href="/wiki/Upstream_(software_development)" title="Upstream (software development)">upstream</a>. As of 2017 all active Psi+ developers have become official Psi developers,<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> and now Psi+ is just a development branch of Psi with <a href="/wiki/Rolling_release" title="Rolling release">rolling release</a> development model. </p><p>Users who wants to receive new features and bug fixes very quickly may use Psi+ on daily basis. Users who do not care about new trends and prefer constancy may choose Psi as it uses classical development model and its releases are quite rare. </p> <div class="mw-heading mw-heading2"><h2 id="Features">Features</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Psi_(instant_messaging_client)&action=edit&section=4" title="Edit section: Features"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Because XMPP allows gateways to other services, which many servers support, it can also connect to <a href="/wiki/Yahoo!_Messenger" class="mw-redirect" title="Yahoo! Messenger">Yahoo!</a>, <a href="/wiki/AOL_Instant_Messenger" class="mw-redirect" title="AOL Instant Messenger">AIM</a>, <a href="/wiki/Gadu-Gadu" title="Gadu-Gadu">Gadu-Gadu</a>, <a href="/wiki/ICQ" title="ICQ">ICQ</a> and <a href="/wiki/Microsoft_Messenger_service" title="Microsoft Messenger service">Microsoft</a> networks.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Other services available using gateway servers include <a href="/wiki/RSS_(file_format)" class="mw-redirect" title="RSS (file format)">RSS</a> and <a href="/wiki/Atom_(standard)" class="mw-redirect" title="Atom (standard)">Atom</a> news feeds, sending <a href="/wiki/Short_message_service" class="mw-redirect" title="Short message service">SMS</a> messages to cellular networks and weather reports. </p><p>As of 2012, Psi has language packs for 20 languages, with more being created.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p><p><a href="/wiki/Emoticon" title="Emoticon">Emoticon</a> packs are supported using the <a href="/w/index.php?title=Jisp_(icons)&action=edit&redlink=1" class="new" title="Jisp (icons) (page does not exist)">jisp</a> format. Many jisp emoticon packs are available, including ones from AIM, <a href="/wiki/IChat" title="IChat">iChat</a>, and <a href="/wiki/Trillian_(instant_messenger)" class="mw-redirect" title="Trillian (instant messenger)">Trillian</a>. </p><p>Psi supports file transfers between other XMPP clients, and it is possible to send to or receive files from other <a href="/wiki/Instant_messenger" class="mw-redirect" title="Instant messenger">IM</a> networks, if the user's servers support this. Psi supports Contact Is Typing Notification (which works with Yahoo!, MSN, and AIM contacts). Version 0.10, released in January 2006, brought automatically resizing contact list and composing window in chat dialogs, tabbed chats, support for Growl messaging system on <a href="/wiki/Mac_OS_X" class="mw-redirect" title="Mac OS X">Mac OS X</a>, window transparency and many other changes. </p><p>Support of audio and video calls in Psi via <a href="/wiki/Jingle_(protocol)" title="Jingle (protocol)">Jingle</a> is implemented via officially supported plugin PsiMedia.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Encryption">Encryption</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Psi_(instant_messaging_client)&action=edit&section=5" title="Edit section: Encryption"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Security is also a major consideration, and Psi provides it for both client-to-server (TLS) and client-to-client (<a href="/wiki/OpenPGP" class="mw-redirect" title="OpenPGP">OpenPGP</a>,<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Off-the-Record_Messaging" class="mw-redirect" title="Off-the-Record Messaging">OTR</a>,<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> and <a href="/wiki/OMEMO" title="OMEMO">OMEMO</a><sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup>) via appropriate plugins. Encryption of messages in group chats is supported only via <a href="/wiki/OMEMO" title="OMEMO">OMEMO</a> plugin. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Psi_(instant_messaging_client)&action=edit&section=6" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1259569809">.mw-parser-output .portalbox{padding:0;margin:0.5em 0;display:table;box-sizing:border-box;max-width:175px;list-style:none}.mw-parser-output .portalborder{border:1px solid var(--border-color-base,#a2a9b1);padding:0.1em;background:var(--background-color-neutral-subtle,#f8f9fa)}.mw-parser-output .portalbox-entry{display:table-row;font-size:85%;line-height:110%;height:1.9em;font-style:italic;font-weight:bold}.mw-parser-output .portalbox-image{display:table-cell;padding:0.2em;vertical-align:middle;text-align:center}.mw-parser-output .portalbox-link{display:table-cell;padding:0.2em 0.2em 0.2em 0.3em;vertical-align:middle}@media(min-width:720px){.mw-parser-output .portalleft{clear:left;float:left;margin:0.5em 1em 0.5em 0}.mw-parser-output .portalright{clear:right;float:right;margin:0.5em 0 0.5em 1em}}</style><ul role="navigation" aria-label="Portals" class="noprint portalbox portalborder portalright"> <li class="portalbox-entry"><span class="portalbox-image"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/31/Free_and_open-source_software_logo_%282009%29.svg/28px-Free_and_open-source_software_logo_%282009%29.svg.png" decoding="async" width="28" height="28" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/31/Free_and_open-source_software_logo_%282009%29.svg/42px-Free_and_open-source_software_logo_%282009%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/31/Free_and_open-source_software_logo_%282009%29.svg/56px-Free_and_open-source_software_logo_%282009%29.svg.png 2x" data-file-width="512" data-file-height="512" /></span></span></span><span class="portalbox-link"><a href="/wiki/Portal:Free_and_open-source_software" title="Portal:Free and open-source software">Free and open-source software portal</a></span></li></ul> <ul><li><a href="/wiki/Comparison_of_instant_messaging_clients" class="mw-redirect" title="Comparison of instant messaging clients">Comparison of instant messaging clients</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Psi_(instant_messaging_client)&action=edit&section=7" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFKarneges" class="citation web cs1">Karneges, Justin. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20011218061414/http://www.affinix.com/~justin/">"Justin's Homepage!"</a>. <i>Psi</i>. Archived from <a rel="nofollow" class="external text" href="http://www.affinix.com/~justin">the original</a> on December 18, 2001.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Psi&rft.atitle=Justin%27s+Homepage%21&rft.aulast=Karneges&rft.aufirst=Justin&rft_id=http%3A%2F%2Fwww.affinix.com%2F~justin&rfr_id=info%3Asid%2Fen.wikipedia.org%3APsi+%28instant+messaging+client%29" class="Z3988"></span></span> </li> <li id="cite_note-wikidata-6e795ac17ee96216dea2c51b45f933c63a21453a-v18-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-wikidata-6e795ac17ee96216dea2c51b45f933c63a21453a-v18_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://github.com/psi-im/psi/releases/tag/1.5">"Release 1.5"</a>. September 6, 2020<span class="reference-accessdate">. Retrieved <span class="nowrap">September 14,</span> 2020</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Release+1.5&rft.date=2020-09-06&rft_id=https%3A%2F%2Fgithub.com%2Fpsi-im%2Fpsi%2Freleases%2Ftag%2F1.5&rfr_id=info%3Asid%2Fen.wikipedia.org%3APsi+%28instant+messaging+client%29" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://github.com/psi-im/psi/blob/master/COPYING">COPYING</a></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.google.com/talk/otherclients.html">"Other IM Clients"</a>. <i>Google Talk Help</i>. 2011<span class="reference-accessdate">. Retrieved <span class="nowrap">January 24,</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Google+Talk+Help&rft.atitle=Other+IM+Clients&rft.date=2011&rft_id=https%3A%2F%2Fwww.google.com%2Ftalk%2Fotherclients.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3APsi+%28instant+messaging+client%29" class="Z3988"></span></span> </li> <li id="cite_note-Psi/2-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-Psi/2_5-0">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="ftp://ftp.netlabs.org/pub/qtapps/psi.zip">Psi build for OS/2</a>. Version 0.15, ZIP package.</span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://xmpp.org/xmpp-software/clients/">"XMPP Software: Clients"</a>. <i>XMPP Standards Foundation</i><span class="reference-accessdate">. Retrieved <span class="nowrap">January 24,</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=XMPP+Standards+Foundation&rft.atitle=XMPP+Software%3A+Clients&rft_id=https%3A%2F%2Fxmpp.org%2Fxmpp-software%2Fclients%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3APsi+%28instant+messaging+client%29" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://archive.today/20120722113703/http://www.bebits.com/app/4625/">"Psi"</a>. <i><a href="/w/index.php?title=BeBits&action=edit&redlink=1" class="new" title="BeBits (page does not exist)">BeBits</a></i>. February 8, 2010. Archived from <a rel="nofollow" class="external text" href="http://www.bebits.com/app/4625/">the original</a> on July 22, 2012<span class="reference-accessdate">. Retrieved <span class="nowrap">January 24,</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=BeBits&rft.atitle=Psi&rft.date=2010-02-08&rft_id=http%3A%2F%2Fwww.bebits.com%2Fapp%2F4625%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3APsi+%28instant+messaging+client%29" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKarneges2004" class="citation mailinglist cs1">Karneges, Justin (November 25, 2004). <a rel="nofollow" class="external text" href="http://lists.affinix.com/pipermail/psi-devel-affinix.com/2004-November/001280.html">"[Psi-devel] Passing the torch"</a>. <i>psi-devel</i> (Mailing list)<span class="reference-accessdate">. Retrieved <span class="nowrap">January 24,</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=%26%2391%3BPsi-devel%26%2393%3B+Passing+the+torch&rft.date=2004-11-25&rft.aulast=Karneges&rft.aufirst=Justin&rft_id=http%3A%2F%2Flists.affinix.com%2Fpipermail%2Fpsi-devel-affinix.com%2F2004-November%2F001280.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3APsi+%28instant+messaging+client%29" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSmith2009" class="citation mailinglist cs1">Smith, Kevin (March 5, 2009). <a rel="nofollow" class="external text" href="http://lists.affinix.com/pipermail/psi-devel-affinix.com/2009-March/008511.html">"[Psi-devel] Psi - under new^h^h^hold management"</a>. <i>psi-devel</i> (Mailing list)<span class="reference-accessdate">. Retrieved <span class="nowrap">January 24,</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=%26%2391%3BPsi-devel%26%2393%3B+Psi+-+under+new%5Eh%5Eh%5Ehold+management&rft.date=2009-03-05&rft.aulast=Smith&rft.aufirst=Kevin&rft_id=http%3A%2F%2Flists.affinix.com%2Fpipermail%2Fpsi-devel-affinix.com%2F2009-March%2F008511.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3APsi+%28instant+messaging+client%29" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20060211051839/http://delta.affinix.com/iris/">"Iris XMPP Library"</a>. <i>Delta XMPP Project</i>. Affinix Software. December 5, 2004. Archived from <a rel="nofollow" class="external text" href="http://delta.affinix.com/iris/">the original</a> on February 11, 2006<span class="reference-accessdate">. Retrieved <span class="nowrap">January 24,</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Delta+XMPP+Project&rft.atitle=Iris+XMPP+Library&rft.date=2004-12-05&rft_id=http%3A%2F%2Fdelta.affinix.com%2Firis%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3APsi+%28instant+messaging+client%29" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://github.com/psi-im/psi/blob/a7afbd9a0d/README.md#development">"README.md"</a>. <i><a href="/wiki/GitHub" title="GitHub">GitHub</a></i>. March 7, 2018<span class="reference-accessdate">. Retrieved <span class="nowrap">March 7,</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=GitHub&rft.atitle=README.md&rft.date=2018-03-07&rft_id=https%3A%2F%2Fgithub.com%2Fpsi-im%2Fpsi%2Fblob%2Fa7afbd9a0d%2FREADME.md%23development&rfr_id=info%3Asid%2Fen.wikipedia.org%3APsi+%28instant+messaging+client%29" class="Z3988"></span></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPopa2007" class="citation web cs1">Popa, Roxana (May 29, 2007). <a rel="nofollow" class="external text" href="http://www.softpedia.com/reviews/linux/Psi-Review-55917.shtml">"Psi Review"</a>. <i><a href="/wiki/Softpedia" title="Softpedia">Softpedia</a></i><span class="reference-accessdate">. Retrieved <span class="nowrap">January 24,</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Softpedia&rft.atitle=Psi+Review&rft.date=2007-05-29&rft.aulast=Popa&rft.aufirst=Roxana&rft_id=http%3A%2F%2Fwww.softpedia.com%2Freviews%2Flinux%2FPsi-Review-55917.shtml&rfr_id=info%3Asid%2Fen.wikipedia.org%3APsi+%28instant+messaging+client%29" class="Z3988"></span></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPopa2008" class="citation web cs1">Popa, Bogdan (March 27, 2008). <a rel="nofollow" class="external text" href="http://news.softpedia.com/news/Best-5-Jabber-Clients-for-Windows-in-Pictures-86636.shtml">"Best 5 Jabber Clients for Windows in Pictures"</a>. <i><a href="/wiki/Softpedia" title="Softpedia">Softpedia</a></i><span class="reference-accessdate">. Retrieved <span class="nowrap">January 24,</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Softpedia&rft.atitle=Best+5+Jabber+Clients+for+Windows+in+Pictures&rft.date=2008-03-27&rft.aulast=Popa&rft.aufirst=Bogdan&rft_id=http%3A%2F%2Fnews.softpedia.com%2Fnews%2FBest-5-Jabber-Clients-for-Windows-in-Pictures-86636.shtml&rfr_id=info%3Asid%2Fen.wikipedia.org%3APsi+%28instant+messaging+client%29" class="Z3988"></span></span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-14">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://github.com/psi-im/psimedia">PsiMedia</a></span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-15">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://github.com/psi-im/plugins/tree/master/generic/openpgpplugin">OpenPGP Plugin</a></span> </li> <li id="cite_note-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-16">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://github.com/psi-im/plugins/tree/master/generic/otrplugin">OTR Plugin</a></span> </li> <li id="cite_note-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-17">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://github.com/psi-im/plugins/tree/master/generic/omemoplugin">OMEMO Plugin</a></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Psi_(instant_messaging_client)&action=edit&section=8" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output 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td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Instant_messaging" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Instant_messaging" title="Template:Instant messaging"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Instant_messaging" title="Template talk:Instant messaging"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Instant_messaging" title="Special:EditPage/Template:Instant messaging"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Instant_messaging" style="font-size:114%;margin:0 4em"><a href="/wiki/Instant_messaging" title="Instant messaging">Instant messaging</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Protocols<br />(<a href="/wiki/Comparison_of_instant_messaging_protocols" title="Comparison of instant messaging protocols">comparison</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Open</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Distributed_Data_Protocol" class="mw-redirect" title="Distributed Data Protocol">DDP</a></li> <li><a href="/wiki/Instant_Messaging_and_Presence_Protocol" title="Instant Messaging and Presence Protocol">IMPP</a></li> <li><a href="/wiki/IRC" title="IRC">IRC</a></li> <li><a href="/wiki/Matrix_(protocol)" title="Matrix (protocol)">Matrix</a></li> <li><a href="/wiki/MTProto" class="mw-redirect" title="MTProto">MTProto</a></li> <li><a href="/wiki/Retroshare" title="Retroshare">Retroshare</a></li> <li><a href="/wiki/Signal_Protocol" title="Signal Protocol">Signal Protocol</a></li> <li><a href="/wiki/Session_Initiation_Protocol" title="Session Initiation Protocol">SIP</a> <ul><li><a href="/wiki/Message_Session_Relay_Protocol" title="Message Session Relay Protocol">MSRP</a></li> <li><a href="/wiki/SIMPLE_(instant_messaging_protocol)" title="SIMPLE (instant messaging protocol)">SIMPLE</a></li></ul></li> <li><a href="/wiki/Tox_(protocol)" title="Tox (protocol)">Tox</a></li> <li><a href="/wiki/XMPP" title="XMPP">XMPP</a> <ul><li><a href="/wiki/Jingle_(protocol)" title="Jingle (protocol)">Jingle</a></li> <li><a href="/wiki/Google_Wave_Federation_Protocol" title="Google Wave Federation Protocol">WFP</a></li></ul></li> <li><a href="/wiki/Zephyr_(protocol)" title="Zephyr (protocol)">Zephyr</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Closed</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Microsoft_Notification_Protocol" title="Microsoft Notification Protocol">MSNP</a></li> <li><a href="/wiki/OSCAR_protocol" title="OSCAR protocol">OSCAR</a> <ul><li><a href="/wiki/TOC_protocol" title="TOC protocol">TOC</a></li></ul></li> <li><a href="/wiki/Skype_protocol" title="Skype protocol">Skype</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Services</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Band_(software)" title="Band (software)">Band</a></li> <li><a href="/wiki/BBM_Enterprise" title="BBM Enterprise">BBM Enterprise</a></li> <li><a href="/wiki/Beeper_(application)" title="Beeper (application)">Beeper</a></li> <li><a href="/wiki/BiP_(software)" title="BiP (software)">BiP</a></li> <li><a href="/wiki/DingTalk" title="DingTalk">DingTalk</a></li> <li><a href="/wiki/Discord" title="Discord">Discord</a></li> <li><a href="/wiki/Element_(software)" title="Element (software)">Element</a></li> <li><a href="/wiki/Google_Chat" title="Google Chat">Google Chat</a></li> <li><a href="/wiki/Google_Meet" title="Google Meet">Google Meet</a></li> <li><a href="/wiki/Google_Messages" title="Google Messages">Google Messages</a></li> <li><a href="/wiki/GroupMe" title="GroupMe">GroupMe</a></li> <li><a href="/wiki/Guilded" title="Guilded">Guilded</a></li> <li><a href="/wiki/HipChat" title="HipChat">HipChat</a></li> <li><a href="/wiki/IGap" title="IGap">iGap</a></li> <li><a href="/wiki/IMessage" title="IMessage">iMessage</a></li> <li><a href="/wiki/Imo.im" title="Imo.im">Imo</a></li> <li><a href="/wiki/IRC#Networks" title="IRC">IRC Networks</a></li> <li><a href="/wiki/Jongla" title="Jongla">Jongla</a></li> <li><a href="/wiki/KakaoTalk" title="KakaoTalk">KakaoTalk</a></li> <li><a href="/wiki/Kik_Messenger" title="Kik Messenger">Kik</a></li> <li><a href="/wiki/Lark_(software)" title="Lark (software)">Lark</a></li> <li><a href="/wiki/Libon_(service)" title="Libon (service)">Libon</a></li> <li><a href="/wiki/Line_(software)" title="Line (software)">Line</a></li> <li><a href="/wiki/Marco_Polo_(app)" title="Marco Polo (app)">Marco Polo</a></li> <li><a href="/wiki/Mattermost" title="Mattermost">Mattermost</a></li> <li><a href="/wiki/Messenger_(software)" title="Messenger (software)">Messenger</a></li> <li><a href="/wiki/The_Palace_(computer_program)" title="The Palace (computer program)">The Palace</a></li> <li><a href="/wiki/Tencent_QQ" title="Tencent QQ">QQ</a></li> <li><a href="/wiki/Session_(software)" title="Session (software)">Session</a></li> <li><a href="/wiki/Signal_(software)" title="Signal (software)">Signal</a></li> <li><a href="/wiki/Skype" title="Skype">Skype</a></li> <li><a href="/wiki/Slack_(software)" title="Slack (software)">Slack</a></li> <li><a href="/wiki/Snapchat" title="Snapchat">Snapchat</a></li> <li><a href="/wiki/Snow_(app)" title="Snow (app)">Snow</a></li> <li><a href="/wiki/Tango_Live" title="Tango Live">Tango Live</a></li> <li><a href="/wiki/Telegram_(software)" title="Telegram (software)">Telegram</a></li> <li><a href="/wiki/Textfree" title="Textfree">Textfree/Pinger</a></li> <li><a href="/wiki/Threema" title="Threema">Threema</a></li> <li><a href="/wiki/Tox_(protocol)" title="Tox (protocol)">Tox</a></li> <li><a href="/wiki/Trillian_(software)" title="Trillian (software)">Trillian</a></li> <li><a href="/wiki/Viber" title="Viber">Viber</a></li> <li><a href="/wiki/VK_(service)" title="VK (service)">VK Messenger</a></li> <li><a href="/wiki/WeChat" title="WeChat">WeChat</a></li> <li><a href="/wiki/WhatsApp" title="WhatsApp">WhatsApp</a></li> <li><a href="/wiki/Wickr" title="Wickr">Wickr</a></li> <li><a href="/wiki/Windows_Messenger_service" title="Windows Messenger service">Windows Messenger service</a></li> <li><a href="/wiki/The_World%27s_Online_Festival" title="The World's Online Festival">WOLF</a></li> <li><a href="/wiki/Zoom_Video_Communications" class="mw-redirect" title="Zoom Video Communications">Zoom</a></li> <li><a href="/wiki/Zulip" title="Zulip">Zulip</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Clients<br />(<a href="/wiki/Comparison_of_cross-platform_instant_messaging_clients" title="Comparison of cross-platform instant messaging clients">comparison</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Single protocol</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Baidu" title="Baidu">Baidu Hi</a></li> <li><a href="/wiki/BBM_Enterprise" title="BBM Enterprise">BBM Enterprise</a></li> <li><a href="/wiki/Briar_(software)" title="Briar (software)">Briar</a></li> <li><a href="/wiki/Element_(software)" title="Element (software)">Element</a></li> <li><a href="/wiki/FaceTime" title="FaceTime">FaceTime</a></li> <li><a href="/wiki/Gadu-Gadu" title="Gadu-Gadu">Gadu-Gadu</a></li> <li><a href="/wiki/GroupMe" title="GroupMe">GroupMe</a></li> <li><a href="/wiki/HCL_Sametime" title="HCL Sametime">HCL Sametime</a></li> <li><a href="/wiki/IMVU" title="IMVU">IMVU</a></li> <li><a href="/wiki/Jami_(software)" title="Jami (software)">Jami</a></li> <li><a href="/wiki/Jongla" title="Jongla">Jongla</a></li> <li><a href="/wiki/Linphone" title="Linphone">Linphone</a></li> <li><a href="/wiki/Messenger_(software)" title="Messenger (software)">Messenger</a></li> <li><a href="/wiki/Tencent_QQ" title="Tencent QQ">QQ</a></li> <li><a href="/wiki/Retroshare" title="Retroshare">Retroshare</a></li> <li><a href="/wiki/Ricochet_(software)" title="Ricochet (software)">Ricochet</a></li> <li><a href="/wiki/Session_(software)" title="Session (software)">Session</a></li> <li><a href="/wiki/Signal_(software)" title="Signal (software)">Signal</a></li> <li><a href="/wiki/Skype" title="Skype">Skype</a></li> <li><a href="/wiki/Telegram_(software)" title="Telegram (software)">Telegram</a></li> <li><a href="/wiki/Tox_(protocol)" title="Tox (protocol)">Tox</a></li> <li><a href="/wiki/WeChat" title="WeChat">WeChat</a></li> <li><a href="/wiki/WhatsApp" title="WhatsApp">WhatsApp</a></li> <li><a href="/wiki/Wickr" title="Wickr">Wickr</a></li> <li><a href="/wiki/Wire_(software)" title="Wire (software)">Wire</a></li> <li><a href="/wiki/The_World%27s_Online_Festival" title="The World's Online Festival">WOLF</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Multi-protocol</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Adium" title="Adium">Adium</a></li> <li><a href="/wiki/Ayttm" title="Ayttm">Ayttm</a></li> <li><a href="/wiki/Beeper_(application)" title="Beeper (application)">Beeper</a></li> <li><a href="/wiki/BitlBee" title="BitlBee">BitlBee</a></li> <li><a href="/wiki/Centericq" title="Centericq">Centericq</a></li> <li><a href="/wiki/EBuddy" title="EBuddy">eBuddy</a></li> <li><a href="/wiki/Jitsi" title="Jitsi">Jitsi</a></li> <li><a href="/wiki/Kopete" title="Kopete">Kopete</a></li> <li><a href="/wiki/Messages_(Apple)" title="Messages (Apple)">Messages</a></li> <li><a href="/wiki/Miranda_NG" title="Miranda NG">Miranda NG</a></li> <li><a href="/wiki/Nimbuzz" title="Nimbuzz">Nimbuzz</a></li> <li><a href="/wiki/Pidgin_(software)" title="Pidgin (software)">Pidgin</a> <ul><li><a href="/wiki/Finch_(software)" title="Finch (software)">Finch</a></li></ul></li> <li><a href="/wiki/Quiet_Internet_Pager" title="Quiet Internet Pager">QIP 2010</a></li> <li><a href="/wiki/Skype_for_Business" title="Skype for Business">Skype for Business</a></li> <li><a href="/wiki/KDE_Telepathy" title="KDE Telepathy">Telepathy</a></li> <li><a href="/wiki/Mozilla_Thunderbird" title="Mozilla Thunderbird">Thunderbird</a></li> <li><a href="/wiki/Trillian_(software)" title="Trillian (software)">Trillian</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/XMPP" title="XMPP">XMPP (Jabber)</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ChatSecure" title="ChatSecure">ChatSecure</a></li> <li><a href="/wiki/Conversations_(software)" title="Conversations (software)">Conversations</a></li> <li><a href="/wiki/Gajim" title="Gajim">Gajim</a></li> <li>Monal</li> <li><a class="mw-selflink selflink">Psi</a></li> <li><a href="/wiki/Spark_(XMPP_client)" title="Spark (XMPP client)">Spark</a></li> <li><a href="/wiki/Tkabber" title="Tkabber">Tkabber</a></li> <li><a href="/wiki/Xabber" title="Xabber">Xabber</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Microsoft_Notification_Protocol" title="Microsoft Notification Protocol">MSNP</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Microsoft_Teams" title="Microsoft Teams">Microsoft Teams</a></li> <li><a href="/wiki/Skype" title="Skype">Skype</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Defunct</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_defunct_instant_messaging_platforms" title="List of defunct instant messaging platforms">List of defunct instant messaging platforms</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Backchannel" title="Backchannel">Backchannel</a></li> <li><a href="/wiki/Chat_log" title="Chat log">Chat log</a></li> <li><a href="/wiki/Chatbot" title="Chatbot">Chatbot</a></li> <li><a href="/wiki/Circuit_(software)" class="mw-redirect" title="Circuit (software)">Circuit</a></li> <li><a href="/wiki/Comparison_of_user_features_of_messaging_platforms" title="Comparison of user features of messaging platforms">Comparison of user features of messaging platforms</a></li> <li><a href="/wiki/Contact_list" title="Contact list">Contact list</a></li> <li><a href="/wiki/Emoticon" title="Emoticon">Emoticon</a></li> <li><a href="/wiki/File_sharing" title="File sharing">File sharing</a></li> <li><a href="/wiki/FirstClass" title="FirstClass">FirstClass</a></li> <li><a href="/wiki/Flock_(messaging_service)" title="Flock (messaging service)">Flock</a></li> <li><a href="/wiki/Fuze_(company)" title="Fuze (company)">Fuze Box</a></li> <li><a href="/wiki/Hall.com" class="mw-redirect" title="Hall.com">Hall.com</a></li> <li><a href="/wiki/LAN_messenger" title="LAN messenger">LAN messenger</a></li> <li><a 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