Documents and notes

Supernotes alternatives

2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.

The full assessment →

The projects

AppFlowy-IO/AppFlowy75,040AGPL-3.0Self-hosted Notion-like collaborative workspace with blocks, rich editor, and AI integrations.Open on GitHub TriliumNext/Trilium37,290AGPL-3.0Hierarchical note-taking app with rich editor, tagging, full-text search, and sharing/export features.Open on GitHub

What you give up either way

Mobile & native desktop apps (iOS, Android, Mac, Windows, Linux) bundled and maintained
Fully offline-first sync with automatic conflict merge across devices
Realtime collaborative editing and presence
AI features (proofreading, auto-organisation) unless you add paid model APIs
Priority support and the vendor's uptime/hosting SLA (99.999% claim)

An open-source project doing the core job proves a replacement is possible. It does not prove it matches Supernotes, and it does not prove anyone has run it for a month. How we decide.