Open Source Alternative to:

Anytype is a local-first workspace where your data lives on your device, encrypted with keys only you hold. It's built for people who want the flexibility of a tool like Notion or Nuclino without handing their data to a company's servers. Notes, tasks, databases, wikis, and chats all live in one place, and none of it is readable by anyone but you.
The privacy model is the core differentiator. Anytype uses on-device encryption by default. No server sits between your devices; sync happens peer-to-peer over local networks. You can also self-host your own backup node. There's no account recovery through a third party because no third party ever has your keys.
Beyond privacy, it's a capable creation tool:
The object model is flexible. Everything in Anytype is an "object" with its own type and relations, which means a task, a contact, a note, and a project can all link to each other in structured ways. It's closer to a personal knowledge graph than a simple note-taking app.
For teams, Anytype supports shared spaces with collaborative editing, making it a self-sovereign alternative to tools like Affine for groups that need both privacy and real-time collaboration. A business tier adds features for larger organizations.
The underlying protocols are open, built by Any, a Swiss non-profit association, so third-party developers can build on top of them without permission.
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