Anytype

anytype.io

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A local-first, open-source personal knowledge and productivity app with pages, databases, graphs, and full offline support — your data stays on your device.

Why it is useful

The most ambitious open-source alternative to Notion — it stores everything locally and syncs peer-to-peer rather than through a central server, giving users genuine data ownership. The object-based model is more flexible than page-based tools for building interconnected knowledge bases. Currently free during beta, with a commitment to always offer a free self-hosted option.