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Catsxp vs Sleipnir: catalog facts
Catsxp	Sleipnir
Free Free to download from the official site.	Free Free to download and use. The software is closed source.
Windows, macOS	Windows, macOS
Continued support for Manifest V2 extensions Mouse gestures, super drag and boss key built in	Right-button mouse gestures cover most navigation, and the tab thumbnails stay usable even with a hundred tabs open.
Closed source Small developer with discussion mostly in Chinese	It is closed source, the documentation is largely Japanese, and the macOS build was paused over a Tahoe…
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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