notesnook

Notesnook is the note-taking app for people who actually care about privacy. End-to-end encrypted with XChaCha20-Poly1305 and Argon2, everything is encrypted on-device before it touches any server. Web app, desktop (Electron), and mobile (React Native) all ship for free.

The encryption isn't bolted on as an afterthought. It's the foundation. Notes, notebooks, tags, attachments, everything gets encrypted client-side. The sync infrastructure handles encrypted blobs only. This makes it a credible Evernote replacement for anyone who's uncomfortable with their notes sitting in plaintext on someone else's server.

Solo users and small teams who value privacy over collaboration features will love this. The editor is solid, markdown support works well, and the apps are polished. Real-time collaboration and deep integrations with other tools are where Notion or Evernote still win. For personal note-taking with actual security, Notesnook is the best option in this space.

The catch: the open source version is the full product, but self-hosting the sync server isn't officially documented. You're trusting their sync infrastructure or going without sync entirely.