CryptPad
End-to-end encrypted collaborative office suite.
CryptPad is an open-source, end-to-end encrypted collaborative office suite. Data is encrypted in the browser before it leaves the device, so no readable content is exposed to service administrators, and changes to documents are synchronized in real time for collaboration.
The suite includes apps for rich text, spreadsheets, presentations, kanban boards, code/Markdown, whiteboards, forms, diagrams, and documents, along with team drives, calendar, and sharing features. It is available as a hosted service or can be self-hosted, and the development team offers subscriptions and support contracts for ready-to-use deployments. A free tier is available on public instances, with paid subscription tiers and donation options for those who wish to support development.
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