Compare software

Heynote vs Buffer: catalog facts
Heynote	Buffer
Free Free download with source code on GitHub.	Free Free and open source under the GPL-3.0 or later licence.
Windows, macOS, Linux	Linux
Blocks with per-block language, highlighting and auto-format Built-in calculator blocks with units and currencies	Focused on temporary text rather than saved documents Native GNOME app
A scratchpad rather than a full note organiser or editor	Not meant for keeping notes long term Linux only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	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.