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aerc vs Pop: catalog facts
aerc	Pop
Free Free and open source under the MIT licence.	Free The open-source software is available without a license fee. Hosting, hardware and…
macOS, Linux, Command line	Windows, macOS, Linux, Command line
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	Offers interactive composition and a scriptable command-line mode.
Terminal only, with vim-style keybindings to learn HTML mail rendering is a terminal browser, so complex newsletters look poor	Requires SMTP credentials or a supported sending-service account.
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
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 21, 2026	Official website Full listing and sources Checked September 22, 2026

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