Compare software

ATAC vs Slumber: catalog facts
ATAC	Slumber
Free Free and open source under the MIT licence.	Free Free and open source.
Windows, macOS, Linux, Command line	Command line
Full API client inside the terminal Optional Vim key bindings	Runs entirely in the terminal Request collections are plain YAML files
Still working toward its 1.0 release No graphical interface for people who prefer a mouse	No graphical interface Requires writing YAML to define requests
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
No account needed	No account needed
Not stated if it 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 23, 2026

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