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

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