Someone made a compilation of academic reviews and blogposts here: https://community.signalusers.org/t/wiki-overview-of-third-party-security-audits/13243 but none of them seem to be real security audit reports, ex. compare with real security audits to Delta Chat: https://delta.chat/en/help#security-audits
IIRC by US law they are not allowed to disclose requests from US gov itself
I would rather prefer real security audits
I would also prefer a server in a jurisdiction that I choose as suitable for my needs. Or, better, a mini-computer on my balcony.
If you and your contacts are all Android, you can Use Briar. It has no central servers and all traffic go through Tor. Open Source and on Fdroid and recommended by privacyguides.org
Yeah, true - I have this installed but inactive for emergencies. It cannot, however, deliver messages when the recipient is offline, and I don’t know how much it drains the battery if left on. So not sure I’d use it as a daily messenger.