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Heynote vs Whisp: catalog facts
Heynote	Whisp
Free Free download with source code on GitHub.	Free Free and open source under the GPL 3.0 or later.
Windows, macOS, Linux	Linux
Blocks with per-block language, highlighting and auto-format Built-in calculator blocks with units and currencies	Start typing immediately with no files or titles to manage Text expansion and automatic checklists
A scratchpad rather than a full note organiser or editor	Built for GNOME on Linux only Not meant for organising a large note collection
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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