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

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