Jitsi
Open Source
Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.
Linphone
Open Source
Linphone is a free voice over IP (VoIP) service and SIP client.
Ring
Open Source
Ring (SFLphone) is an open-source SIP-compatible softphone and instant messenger for Linux, Microsoft Windows, OS X and Android.
Zulip
Open Source
Zulip is a chat and collaborative software.
YakYak
Open Source
YakYak is a desktop chat client for Google Hangouts.
Empathy
Open Source
Empathy is an instant messaging (IM) and voice over IP (VoIP) client which supports text, voice, video, file transfers, and inter-application communication ov…
Wire
Free
Wire is a cross-platform, encrypted instant messaging client created by Wire Swiss. It is available for iOS, Android, Linux, Windows, macOS and Web browser cl…
Blink
Freemium
Blink is the best real-time communications client using the SIP protocol.
QuteCom
Open Source
QuteCom (WengoPhone) is a free-software SIP-compliant VoIP client.
