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Buttercup vs Padloc: catalog facts
Buttercup	Padloc
Free Free and open source, no longer developed.	Freemium The software is open source and self-hostable. The hosted service has free and paid tiers.
Windows, macOS, Linux	Windows, macOS, Linux, Android, iOS, Web, Self-hosted, Browser extension
Vaults are ordinary encrypted files you control, with no Buttercup account Installers for Windows, macOS and Linux, plus a portable Windows build	The server is open source, so the whole stack can be self-hosted Clean interface across desktop, mobile and browser
The project has ended; no updates or security fixes will follow the September 2024 release Issues and pull requests are ignored, so bugs will not be fixed	Smaller ecosystem and slower development than the market leaders Advanced sharing and organisation features need a paid plan
Downloadable app	Downloadable app, Self-hosted, Hosted service, Browser extension
Open source	Open source
License: GPL-3.0	License: AGPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.