Signal
Open Source
Signal is the most scalable encryption tool.
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…
Xabber
Open Source
Xabber (XMPP and Jabber) is a XMPP client for the Android Operating System.
Conversations
Freemium
Conversations is an open source XMPP/Jabber client for the Android platform.
QuteCom
Open Source
QuteCom (WengoPhone) is a free-software SIP-compliant VoIP client.
YakYak
Open Source
YakYak is a desktop chat client for Google Hangouts.
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.
Tango
Freemium
Tango is the messaging app with the best video calling. All messages and calls are free.
Zoiper
Freemium
Zoiper is an easy to use sip video softphone, with excellent voice quality and easy to setup.
MicroSIP
Open Source
MicroSIP is a portable SIP softphone based on the PJSIP stack available for Microsoft Windows.
Compare Blink with alternatives
Compare Conversations and Blink and decide which is most suitable for you.