Jitsi (from Bulgarian: жици — "wires") is a collection of free and open-source multiplatform voice (VoIP), video conferencing and instant messaging applications for the Web platform, Windows, Linux, macOS, iOS, iPadOS, watchOS, and Android.

With the growth of WebRTC, the project team focus shifted to the Jitsi Videobridge for allowing web-based multi-party video calling.

Later the team added Jitsi Meet, a full video conferencing application that includes web, Android, iOS, iPadOS, and watchOS clients.

[10][11][12] Jitsi has received support from various institutions such as the NLnet Foundation,[13][14] the University of Strasbourg and the Region of Alsace,[15] Data Consultancy Services, the European Commission[16] and it has also had multiple participations in the Google Summer of Code program.

[20] In 2009, Emil Ivov founded the BlueJimp company, which has employed some of Jitsi's main contributors,[21][22] in order to offer professional support and development services[23] related to the project.

[28] On February 1, 2015, Hristo Terezov, Ingo Bauersachs and the rest of the team released[29] version 2.6 from their stand at the Free and Open Source Software Developers' European Meeting 2015 event in Brussels.

Among other notable improvements, the OS X version bundles a Java 8 runtime, enables echo cancelling by default, and uses the CoreAudio subsystem.

The major projects include:[36] Jitsi Meet is an open source JavaScript WebRTC application used primarily for video conferencing.

[8] It also includes:[52] In an April 2020 test of video conferencing services, US product review owned by the New York Times Wirecutter recommended Jitsi Meet as one of its two picks (after the more feature-rich Cisco Webex which it found preferable for large groups and enterprises), stating that Jitsi was "easy to use and reliable" and that "in our testing, the video quality and audio quality were both great — noticeably sharper and crisper than on Zoom or Webex".