Compare software

mu vs aerc: catalog facts
muaerc
Free

Free to download, with source code on GitHub.

Free

Free and open source under the MIT licence.

Linux, Command line macOS, Linux, Command line
  • Fast indexing and detailed search of Maildir mail
  • mu4e gives a full email client inside Emacs
  • Composes in an embedded terminal, so you can read other mail while replying
  • Built for the git mailing-list patch workflow, with diff highlighting and repo tabs
  • Works only with Maildir storage; mail must be fetched separately
  • The client side requires Emacs
  • Terminal only, with vim-style keybindings to learn
  • HTML mail rendering is a terminal browser, so complex newsletters look poor
Downloadable app Downloadable app
Open source Open source
License not stated License: MIT
No account needed No account needed
Works offline Works offline

Checked September 23, 2026

Checked September 21, 2026

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