SigmaOS
The facts below are what the maker publishes about SigmaOS, checked and dated. Our editors have not written about it yet.
Plans and prices
From SigmaOS's own pricing page, checked 21 Sep 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Basic | — | Unlimited workspaces · Fast ad-blocker · Limited Airis Assistant |
| Personal Pro | $20 a month | Unlimited Advanced Airis · Look it up with high usage · Interactive Summaries with high usage · billed monthly |
| Personal Max | $30 a month | Everything in Personal Pro · More LLM models · Unlimited Look it up queries · Unlimited Interactive Summaries · billed monthly |
The facts
Each one read from SigmaOS's own pages, with the date it was checked.
Where it runs
- Browser engine
- webkitchecked 21 Sep 2026
- Cross-device sync
- Yeschecked 21 Sep 2026
- Supported platforms
- desktopchecked 21 Sep 2026
What it does
- Built-in ad blocking
- Yeschecked 21 Sep 2026
- Extension support
- bothchecked 21 Sep 2026
- Paid from
- 20checked 21 Sep 2026
The company
- Founded
- 2020checked 28 Sep 2026
- Headquarters
- London, United Kingdomchecked 28 Sep 2026
Money
- Free plan
- Yeschecked 21 Sep 2026
Alternatives to SigmaOS
- 1
Brave Browser
Free planOpen sourceAndroidiOSLinuxmacOS9.2Free plan - 2
DuckDuckGo Browser
Free planAndroidiOSmacOSWindows8.8Free plan - 3
AVG Secure Browser
Free planAndroidWebExtensionmacOS8.8From $39.99 a year - 4
Kameleo
Free planAndroidiOSWebAPI8.8Free plan - 5
Opera
Free planAndroidiOSWebExtension8.7From $48 a year - 6
Waterfox
Free planOpen sourceAndroidExtensionLinuxmacOS8.7From $5 a month