Bitwarden
the only one open source top to bottom, audited by a named firm every year since 2018, and the cheapest here.
nothing else here lets outside researchers read both the client and the server, and nothing else has an audit trail this long or this specific.
client and server are both published on github, which means the zero-knowledge claim is checkable rather than promised. the audit record backs it: cure53 repeatedly from 2018, insight risk, mandiant on mobile in 2024, ioactive on the clients, unit 42 in 2025, fracture labs, and an eth zurich applied cryptography review in 2025 that tested the core crypto against a scenario where bitwarden's own server is malicious. all downloadable.
it is also the cheapest paid tier in the ranking at $19.80 a year, with a free tier that stores unlimited items across unlimited devices — a genuinely usable product rather than a trial. self-hosting is supported through docker, kubernetes or an offline deployment for anyone who wants the server under their own control.
the description above is ours, condensed from the ranking. pricing moves — check it on the vendor's own page before you rely on it.
- category
- password managers
- pricing
- $19.80/yr
- website
- bitwarden.com
nothing else here lets outside researchers read both the client and the server, and nothing else has an audit trail this long or this specific.
we researched this category against vendors' own pricing pages and licence files. that is where this line comes from — not from the vendor, and not from anything they paid for.