Compare software

mu vs meli: catalog facts
mu	meli
Free Free to download, with source code on GitHub.	Free Free and open source under the GPLv3.
Linux, Command line	macOS, Linux, Command line
Fast indexing and detailed search of Maildir mail mu4e gives a full email client inside Emacs	Supports IMAP, Maildir, notmuch, JMAP and mbox Plain text configuration with sane defaults
Works only with Maildir storage; mail must be fetched separately The client side requires Emacs	Described by its developers as experimental Non-UTF-8 encodings are read-only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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