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by Fox8 3274 days ago
Signal, Wire, Privus SecurLine, Riot (Matrix), Threema are good candidates for audio and text secure communications.

Some leak metadata, some have countermeasures like not using own's phone number (SecurLine and Threema) or using fixed bitrate for audio calls (Signal, Wire, SecurLine).

If you want privacy and trust choose a solution in that you can audit the source code and that it is verified by a third party auditor.