Compare software

Mutt vs mu: catalog facts
Mutt	mu
Free Free and open source.	Free Free to download, with source code on GitHub.
macOS, Linux, Command line	Linux, Command line
Keyboard-driven and fast Works well over SSH	Fast indexing and detailed search of Maildir mail mu4e gives a full email client inside Emacs
Steep learning curve No graphical interface	Works only with Maildir storage; mail must be fetched separately The client side requires Emacs
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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