baresip

This application is a fully open source VoIP User Agent based on baresip library. Its development is motivated by need for a secure, privacy focused SIP user agent for Android that has no commercial associations and does not depend on third party push notification services.

Currently baresip app supports voice calls. text messages, voicemail Message Waiting Indication as well as blind and attended call transfers. Voice can be coded with Opus, AMR, Codec2, G.729, G.722, G.722.1, G.726, or PCMU/PCMA codecs. Security is achieved via TLS or WSS SIP signaling transport and ZRTP or (DTLS) SRTP media encapsulation.

If you need video calling and have a device that supports Camera2 API at hardware Support Level LEVEL3, you can instead of this application install its sister application baresip+, which is currently only available from F-Droid.

baresip app privacy policy is available here.

Source code is available at GitHub, where also issues can be reported.