Overview
Buttercup is a free, open-source password manager available as desktop apps (Linux, macOS, Windows), a browser extension, and a mobile app. Vaults are stored as encrypted BCUP files that can be synced via Dropbox, Google Drive, WebDAV, or any self-hosted Nextcloud instance. The codebase is fully JavaScript/TypeScript, making it easy for contributors to audit or extend.
Where it falls short of 1Password
- No native server component; vault sync relies on third-party storage providers
- No emergency access or vault recovery mechanism built in
- Team sharing and organizational features are absent
We list the gaps honestly so you can decide if the trade-off is worth owning your data.
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