Compare software

mu vs Himalaya: catalog facts
mu	Himalaya
Free Free to download, with source code on GitHub.	Free The open-source software is available without a license fee. Hosting, hardware and…
Linux, Command line	Windows, macOS, Linux, Command line
Fast indexing and detailed search of Maildir mail mu4e gives a full email client inside Emacs	Supports several mail protocols and local mailbox formats.
Works only with Maildir storage; mail must be fetched separately The client side requires Emacs	Mail authentication and account configuration are required.
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT OR Apache-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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