CryptPad

CryptPad is a unique open-source collaboration suite that combines real-time editing with end-to-end encryption. Unlike most cloud office tools, CryptPad ensures that the server never has access to the content of your documents — all encryption and decryption happens in the browser. This zero-knowledge architecture makes it one of the most privacy-respecting alternatives to Google Docs.

CryptPad includes tools for collaborative documents (rich text), spreadsheets, presentations, code editing, forms, whiteboards, and Kanban boards — all available in one unified platform. Documents can be organized in drives and shared securely with teams using cryptographic access controls.

Licensed under AGPL-3.0, CryptPad can be self-hosted and is also available as a managed service at cryptpad.fr. It is actively maintained by a team committed to privacy-first collaboration software and is widely used by journalists, activists, and privacy-conscious organizations.