AFFiNE offers a full KnowledgeOS package that includes docs, whiteboards and databases. It's got AI tools for writing, drawing and planning, and unlimited local workspaces, and its pricing is flexible. AFFiNE puts data privacy first with a local-first approach, and it's got a community space for people to connect and share ideas.
Another good option is Puzzle Studio, a private chatbot-building tool that marries AI with a peer-to-peer knowledge base. It lets teams work together without knowledge silos, and data stays on their own machines. Offline support and LLM agnosticism means Puzzle Studio is flexible and gives you control over your knowledge.
If you need a centralized knowledge management system with strong privacy, WorkHub is worth a look. It can link multiple databases, files and URLs into one interface, and AI tools automate tasks and deliver personalized knowledge. The system has strong privacy controls with role-based access control and compliance options, so it should work in many industries.