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Heptabase vs Scapple: catalog facts
Heptabase	Scapple
Paid Paid subscription, no permanent free tier mentioned.	Paid One-time purchase, with a free trial available.
Windows, macOS, Web	Windows, macOS
Whiteboard and card format suits visual thinkers and complex research Cross-platform availability across desktop and web	Notes can go anywhere with no forced central topic Connections made by dragging one note onto another
Paid subscription required to use Visual, card-based workflow takes longer to set up than plain text notes	Paid after the trial No Linux or mobile versions mentioned
Downloadable app, Web application	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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