[tmikaeld]

Bitwarden recently completed a 3rd party Audit[1] and Bitwarden is the only one to be completely open source[2] (server and client).

[1] https://blog.bitwarden.com/bitwarden-completes-third-party-s... [2] https://github.com/bitwarden/

[woolvalley]

It also has pretty much zero automated (unit, integration, etc) tests as of a few weeks ago.

[jopsen]

But you only know that because you can see the source.

[paulryanrogers]

They may have non-public tests to discourage forking. IIRC, Sqlite similarly has some proprietary tests only available to paying customers.