Linphone

{{Short description|Voice over IP software}}

{{Infobox software

| logo =

| logo alt =

| logo size = 128px

| screenshot = Linphone-4.1.1-screenshot.png

| screenshot alt = Dialer, video call and chat interfaces side by side

| caption = Linphone running on Windows

| collapsible =

| author = Belledonne Communications

| developer = Linphone

| released =

| ver layout = stacked

| latest release version = {{Multiple releases

| branch1 = Android

| version1 = {{wikidata|property|preferred|reference|edit|Q119979|P348|P400=Q94|P548=Q2804309}}

| date1 = {{wikidata|qualifier|preferred|single|Q119979|P348|P400=Q94|P548=Q2804309|P577}}

| branch2 = iOS

| version2 = {{wikidata|property|preferred|reference|edit|Q119979|P348|P400=Q48493|P548=Q2804309}}

| date2 = {{wikidata|qualifier|preferred|single|Q119979|P348|P400=Q48493|P548=Q2804309|P577}}

| branch3 = Linux

| version3 = {{wikidata|property|preferred|reference|edit|Q119979|P348|P400=Q388|P548=Q2804309}}

| date3 = {{wikidata|qualifier|preferred|single|Q119979|P348|P400=Q388|P548=Q2804309|P577}}

| branch4 = macOS

| version4 = {{wikidata|property|preferred|reference|edit|Q119979|P348|P400=Q14116|P548=Q2804309}}

| date4 = {{wikidata|qualifier|preferred|single|Q119979|P348|P400=Q14116|P548=Q2804309|P577}}

| branch5 = Windows

| version5 = {{wikidata|property|preferred|reference|edit|Q119979|P348|P400=Q1406|P548=Q2804309}}

| date5 = {{wikidata|qualifier|preferred|single|Q119979|P348|P400=Q1406|P548=Q2804309|P577}}

}}

| latest preview version = {{Multiple releases

| branch1 = Android

| version1 = {{wikidata|property|preferred|reference|edit|Q119979|P348|P400=Q94|P548=Q51930650}}

| date1 = {{wikidata|qualifier|preferred|single|Q119979|P348|P400=Q94|P548=Q51930650|P577}}

| branch2 = iOS

| version2 = {{wikidata|property|preferred|reference|edit|Q119979|P348|P400=Q48493|P548=Q51930650}}

| date2 = {{wikidata|qualifier|preferred|single|Q119979|P348|P400=Q48493|P548=Q51930650|P577}}

| branch3 = Linux

| version3 = {{wikidata|property|preferred|reference|edit|Q119979|P348|P400=Q388|P548=Q51930650}}

| date3 = {{wikidata|qualifier|preferred|single|Q119979|P348|P400=Q388|P548=Q51930650|P577}}

| branch4 = macOS

| version4 = {{wikidata|property|preferred|reference|edit|Q119979|P348|P400=Q14116|P548=Q51930650}}

| date4 = {{wikidata|qualifier|preferred|single|Q119979|P348|P400=Q14116|P548=Q51930650|P577}}

| branch5 = Windows

| version5 = {{wikidata|property|preferred|reference|edit|Q119979|P348|P400=Q1406|P548=Q51930650}}

| date5 = {{wikidata|qualifier|preferred|single|Q119979|P348|P400=Q1406|P548=Q51930650|P577}}

}}

| programming language = C, Java, C#, Python{{cite web|url=https://www.linphone.org/technical-corner/linphone/overview |archive-url=https://archive.today/20160113040339/https://www.linphone.org/technical-corner/linphone/overview |archive-date=2016-01-13 |title=Linphone |url-status=dead }}

| operating system = Linux, FreeBSD,[http://www.freshports.org/net/linphone/ FreeBSD port of Linphone] Windows, Mac OS, iPhone, Android, Windows Phone

| size = 8–17 MB

| language = Multilingual, including English, Arabic, Dutch, French, German, Japanese, Russian and Traditional Chinese

| status =

| genre = Voice over IP, instant messaging, videoconferencing

| license = GPL-3.0-or-later[https://www.linphone.org/licensing-services Linphone.org » Linphone » Licensing] {{webarchive|url=https://web.archive.org/web/20130815194002/http://www.linphone.org/eng/linphone/license.html |date=2013-08-15 }} or proprietary{{Cite web |url=https://www.linphone.org/technical-corner/linphone |title=Linphone: VOIP softphone - open source video sip phone, voip software |access-date=2018-08-02 |archive-url=https://web.archive.org/web/20171211105027/http://www.linphone.org/technical-corner/linphone/downloads |archive-date=2017-12-11 |url-status=dead }}

| website = {{URL|https://linphone.org}}

}}

Linphone (contraction of Linux phone) is a free voice over IP softphone, SIP client and service. It may be used for audio and video direct calls and calls through any VoIP softswitch or IP-PBX. Linphone also provides the possibility to exchange instant messages. It has a simple multilanguage interface based on Qt for GUI and can also be run as a console-mode application on Linux.

Both SIP service and software could be used together, but also independently: it's possible to connect Linphone service with any SIP client (software or hardware), and to use Linphone software with any SIP service.

The softphone is currently developed by Belledonne Communications in France. Linphone was initially developed for Linux{{cite web|url=http://linphone.org/|title=LINPHONE, SIP video phone client|access-date=1 September 2014|archive-url=https://web.archive.org/web/20141008144717/http://www.belledonne-communications.com/linphone.html|archive-date=8 October 2014|url-status=dead}}[http://androidtapp.com/linphone-video AndroidTapp.com: Linphone Video, Make Phone Calls over Phone’s Internet without using Minutes] but now supports many additional platforms including Microsoft Windows, macOS, and mobile phones running Windows Phone,[https://www.windowsphone.com/en-gb/store/app/linphone/99661466-8c5c-489b-a567-569c1f480d29 Linphone] iOS[http://ostatic.com/blog/bye-bye-skype-top-3-free-replacements Ostatic.com: Blog: Bye Bye Skype, Top 3 Free Replacements] {{webarchive|url=https://web.archive.org/web/20111127175055/http://ostatic.com/blog/bye-bye-skype-top-3-free-replacements |date=2011-11-27 }} or Android.[https://play.google.com/store/apps/details?id=org.linphone Linphone in the] Google Play Store It supports ZRTP for end-to-end encrypted voice and video communication.

Linphone is licensed under the GNU GPL-3.0-or-later and supports IPv6. Linphone can also be used behind network address translator (NAT), meaning it can run behind home routers. It is compatible with telephony by using an Internet telephony service provider (ITSP).