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Catalyst vs Vieb: catalog facts
Catalyst	Vieb
Free Free and open source under the MIT licence.	Free Free and open source, with optional sponsorship of the developer.
Windows, Linux	Windows, macOS, Linux
Small, minimal browser with a customizable interface Separate stable, beta and LTS release channels	Vim-style keybindings, commands and options throughout Built-in ad blocker and privacy settings that work without web requests
Small independent project with a much smaller team than mainstream browsers The v5 rewrite is still an early alpha	Steep learning curve for anyone not used to Vim Built on Electron rather than a mainstream browser
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 October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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