CryptPad

CryptPad is an open source collaborative office suite that encrypts documents end to end. The service is built so that the server cannot read what people write.

The suite includes rich text, spreadsheets, presentations, code, diagrams, forms and Kanban boards. People edit together in real time, and content is encrypted before it leaves their browser. Chat and other apps sit alongside the editors, so a team can work in one suite rather than several.

• Edit documents, sheets and presentations together
• Keep content end to end encrypted
• Build Kanban boards and forms
• Use code and Markdown editors
• Run apps on public or self-hosted instances

Privacy-conscious teams, nonprofits and schools that want shared documents without handing content to a third party. Organisations that need to host their own instance may also choose it for the same reasons.

CryptPad is open source under AGPL-3.0. Public instances can be used at no charge, and the project accepts donations through OpenCollective. Enterprise and hosted options are also listed on the site. Public instances have their own usage terms, so read them before relying on one.