Compare software

GNU Emacs vs Lem: catalog facts
GNU EmacsLem
Free

Free software under the GPL, part of the GNU Project.

Free

Free and open source.

Windows, macOS, Linux, Android macOS, Linux, Command line
  • Extensible in Emacs Lisp at runtime, so any behaviour can be changed without rebuilding
  • Org mode is a genuinely excellent system for notes, tasks and literate documents
  • Extensible in Common Lisp while running
  • Emacs-like and Vim-like modes
  • A steep learning curve, with keybindings unlike any other editor
  • A usable configuration takes substantial time, hence Doom and Spacemacs
  • Extending it requires learning Common Lisp
  • GUI is in transition from SDL2 to a webview version
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License not stated
No account needed No account needed
Works offline Works offline

Checked September 21, 2026

Checked September 23, 2026

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