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.
CSipSimple
Open Source
CSipSimple is a Voice over Internet Protocol (VoIP) application for Google Android operating system using the Session Initiation Protocol (SIP).
Telephone
Open Source
Telephone allows you to make phone calls over the Internet or your company’s network.
QuteCom
Open Source
QuteCom (WengoPhone) is a free-software SIP-compliant VoIP client.
Dasher Messenger
Free
Dasher Messenger provids a way to message friends.
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…
appear.in
Freemium
appear.in provides one-click video conferences right in your browser without requiring PIN codes or additional software.
Blink
Freemium
Blink is the best real-time communications client using the SIP protocol.
Zulip
Open Source
Zulip is a chat and collaborative software.
MicroSIP
Open Source
MicroSIP is a portable SIP softphone based on the PJSIP stack available for Microsoft Windows.
YakYak
Open Source
YakYak is a desktop chat client for Google Hangouts.
Compare Zoiper with alternatives
Compare Dasher Messenger and Zoiper and decide which is most suitable for you.