Sigma Browser
Sigma is a private AI browser with built-in AI agent and ad blocker.
At a glance
Starts at
$8 per month -20%
Price as published by the vendor, September 2026.
Free tier
Yes, limited
Platforms
Web, macOS, Windows
Best for
Developers, privacy-conscious users
4.0 out of 5
Scored by a Toolio reviewer after real useOur verdict
Sigma offers fast browsing and local AI. Great for those who value privacy but lacks some advanced features of bigger players like ChatGPT Atlas or Chrome.
✓What it does well
Fast1.32x faster than ChatGPT Atlas in benchmark tests.
Private AIData stays local; no cloud processing, enhancing privacy and speed.
Ad BlockerFilters out intrusive ads for a cleaner browsing experience.
✕Where it falls short
Limited features in free planFree version limits access to AI Agent, Deep Research and more.
No advanced search capabilitiesChat With Page does not support complex searches compared to competitors.
Higher RAM usage in Pro planPro version consumes more memory, potentially slowing down your system.
Key features
AI AgentHandles tasks and navigates pages on behalf of the user.
Web3 IntegrationConnects to decentralized apps directly from browser.
Privacy FirstEnd-to-end encryption prevents third-party access or interception of data.
Web3 InteractionsConnect to decentralized apps directly.