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Brave vs Sigma AI Browser: catalog facts
Brave	Sigma AI Browser
Freemium The browser is free. Brave VPN and Brave Leo Premium are paid subscriptions, and both are…	Free Described by the developer as a free browser.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Android, iOS
Ad and tracker blocking is on by default, with a per-site panel showing what was blocked Chromium underneath, so Chrome extensions and site compatibility carry over	Built-in AI agent that acts on web pages Local Eclipse LLM keeps prompts on the device
Ships a crypto wallet, a rewards programme and an AI assistant that many people will never use Brave has had to apologise for past missteps, including auto-completing affiliate links in the address bar in 2020	Cloud AI features send data off the device Developer and licensing details are not clearly stated
Downloadable app	Downloadable app
Open source	Closed source
License: MPL-2.0	License not stated
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 2, 2026

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