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Heptabase vs Supernotes: catalog facts
Heptabase	Supernotes
Paid Paid subscription, no permanent free tier mentioned.	Freemium Free to start, with paid plans for more features.
Windows, macOS, Web	iOS, Web
Whiteboard and card format suits visual thinkers and complex research Cross-platform availability across desktop and web	Notecard format with Markdown and LaTeX Linked cards with a 2D or 3D graph view
Paid subscription required to use Visual, card-based workflow takes longer to set up than plain text notes	Requires an account and cloud service Some features, including AI, need a paid plan
Downloadable app, Web application	Downloadable app, Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.