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Slumber vs Bruno: catalog facts
Slumber	Bruno
Free Free and open source.	Freemium Most features are free and open source under the MIT licence. Paid editions add features…
Command line	Windows, macOS, Linux
Runs entirely in the terminal Request collections are plain YAML files	Collections are plain files, so Git does the versioning and sharing Offline only, with the project committing to never adding cloud sync
No graphical interface Requires writing YAML to define requests	Some team features are paid The Bru markup is a format specific to Bruno
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 21, 2026

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