Files

Zero-knowledge encrypted cloud storage from a German company, with open source clients and a 10 GiB free tier.

End-to-end encrypted cloud storage from a Swiss company, with web, desktop, and mobile clients.

Self-hosted file sync and collaboration suite covering files, calendar, contacts, chat, and office.

Self-hosted file sync server with library-based encryption and block-level deduplication, scoped tightly to files.

Peer-to-peer continuous file sync between your own devices, with no central server and no cloud copy.

Open-source office suite for documents, spreadsheets, and presentations, fully offline and self-hostable.