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No. 110 of 148 ·Web browsers

SigmaOS

Mac

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Freedom report

One barScore 6.0

  • Free tierNo free tier on record
  • Open codeNo open-source code on record
  • Runs widely1 of 6 device platforms
  • DocumentedPlans, terms and facts published

SigmaOS is ranked #110 of 148 in web browsers on Freedom251, made by SigmaOS (London, United Kingdom). It runs on macOS.

SigmaOS plans and pricing

All plans
Basic Not published Unlimited workspaces · Fast ad-blocker · Limited Airis Assistant sigmaos.com · 21 Sept 2026
Personal Pro $20/mo billed monthly Unlimited Advanced Airis · Look it up with high usage · Interactive Summaries with high usage sigmaos.com · 21 Sept 2026
Personal Max $30/mo billed monthly Everything in Personal Pro · More LLM models · Unlimited Look it up queries · Unlimited Interactive Summaries sigmaos.com · 21 Sept 2026

Compared on web browsers

Free plan
Yes
Paid from
$20/mo
Supported platforms
desktop
Browser engine
webkit
Built-in ad blocking
Yes
Extension support
both
Cross-device sync
Yes

Best SigmaOS alternatives

See all 20
Three bars Mozilla Firefox Free tierOpen source No. 1Free9.7 Three bars Brave Browser Free tierOpen source No. 2$2.50/mo9.7 Three bars Waterfox Free tierOpen source No. 3$5/mo9.5 Three bars Tor Browser Free tierOpen source No. 4Free9.4 Three bars Mullvad Browser Free tierOpen source No. 5Free9.3 Three bars LibreWolf Free tierOpen source No. 6Free9.3