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Mutt vs nmh: catalog facts
Mutt	nmh
Free Free and open source.	Free Free software under the BSD-3-Clause license.
macOS, Linux, Command line	macOS, Linux, Command line
Keyboard-driven and fast Works well over SSH	Uses small, single-purpose mail programs Commands can be combined in shell scripts
Steep learning curve No graphical interface	Gmail API access is experimental Gmail OAuth2 support for desktop applications has been dropped
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: BSD-3-Clause
No 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 24, 2026	Official website Full listing and sources Checked October 8, 2026

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