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Sigma AI Browser vs Tabbit: catalog facts
Sigma AI Browser	Tabbit
Free Described by the developer as a free browser.	Freemium Free to download and try; paid plan details are not given on the homepage.
Windows, macOS, Android, iOS	Windows, macOS
Built-in AI agent that acts on web pages Local Eclipse LLM keeps prompts on the device	Agent mode for multi-step tasks in the browser Many AI models from different providers
Cloud AI features send data off the device Developer and licensing details are not clearly stated	Relies on cloud AI models No Linux version
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	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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