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ain vs Slumber: catalog facts
ain	Slumber
Free Free to download.	Free Free and open source.
Windows, macOS, Linux, Command line	Command line
Requests kept as plain-text files in folders Environment variables and .env file support	Runs entirely in the terminal Request collections are plain YAML files
Terminal only, no graphical interface Smaller community than the GUI clients it replaces	No graphical interface Requires writing YAML to define requests
Downloadable app	Downloadable app
Closed source	Open source
License not stated	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 24, 2026	Official website Full listing and sources Checked September 23, 2026

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