Anytype is a local-first, end-to-end encrypted workspace for notes, tasks, and knowledge management. It handles local-first, e2e encrypted, object types, and relations, and it's best suited for users wanting a local-first, encrypted notion alternative. It has been around since 2021, giving it a 5-year head start in building out integrations and refining the product.

The core product is entirely free. Since it's open-source, you can self-host for free with no user limits. It's aimed at individual users, so it's fast to set up but may lack team-management features if you scale.