Bitwarden is an open source password manager. The source code for Bitwarden is hosted on GitHub and everyone is free to review, audit, and contribute to the Bitwarden codebase.

Vaultwarden is an alternative implementation of the Bitwarden server API written in Rust and compatible with upstream Bitwarden clients, perfect for self-hosted deployment where running the official resource-heavy service might not be ideal.

Homepage: https://bitwarden.com/open-source/
Homepage: https://github.com/dani-garcia/vaultwarden
Homepage: https://www.vaultwarden.net/