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iamb vs Ement.el: catalog facts
iamb	Ement.el
Free Free and open source under the Apache-2.0 licence.	Free Free and open source under the GPL-3.0.
Command line	Windows, macOS, Linux
Vim keybindings throughout End-to-end encryption, threads and spaces	Matrix chat without leaving Emacs Uses Emacs buffers and keybindings
Terminal only, no graphical interface Still pre-1.0 releases	Requires GNU Emacs and some familiarity with it Text-focused, with no standalone interface
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-3.0
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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