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SigmaOS

Freemium#75 of 145 in Web BrowsersGoogle Chrome Alternatives

SigmaOS: A distinctive Mac-only browser for organizing research across workspaces. Ranked #75 of 145 in Web Browsers by our editors (3.0/10); pricing: Free plan; best for mac users organizing research-heavy browsing.

3.0/10Editor score
Visit SigmaOS
SigmaOS3.0 Visit SigmaOS

At a glance

  • Editor score
    3.0 / 10
  • Pricing
    Free plan
  • Best for
    Mac users organizing research-heavy browsing
  • Free plan
    Yes
  • Browser engine
    Webkit
  • Founded
    2020 · London, United Kingdom
  • Facts checked
    21 Sep 2026
SigmaOS screenshot

  • Where it wins

    • Workspaces and vertical page lists replace conventional tab rows.
    • Focus Mode, split screen, and Lazy Search support research workflows.
    • Chrome extensions, sync, ad blocking, and Airis AI are built in.

  • Where it doesn't

    • Available only on macOS.
    • Advanced AI features require paid plans starting at $20 per month.
    • The workspace-first layout may not suit conventional tab workflows.

Our verdict on SigmaOS

SigmaOS is a macOS-only web browser for people who organize research, pages, and web apps by project or context. Instead of conventional tab rows, it uses workspaces and vertical page lists, with Focus Mode, split-screen browsing, Lazy Search, private workspaces, separate cookies, and automatic synchronization across devices. It also includes a built-in ad blocker, Chrome Web Store extension support, and Airis AI features for web research. Its WebKit foundation and Mac-only availability make it a focused desktop choice rather than a general browser for every platform.

The pricing structure separates the core workspace experience from expanded AI usage. The Basic plan includes unlimited workspaces, a fast ad blocker, and limited Airis Assistant access. Personal Pro costs $20 per month and adds unlimited Advanced Airis powered by GPT-4o, high-usage Look it up access, and high-usage Interactive Summaries. Personal Max costs $30 per month and adds more LLM models, including Llama and Claude, plus unlimited Look it up queries and unlimited Interactive Summaries. The paid tiers make the most sense for buyers who specifically want frequent AI-assisted research rather than only workspace organization.

SigmaOS also fits into an established Mac browsing setup through Chrome Web Store extensions, Apple Keychain, password managers including 1Password, Dashlane, LastPass, Keeper, Zoho Vault, and Bitwarden, and search options including DuckDuckGo, Ecosia, You.com, and Bing. Choose it if vertical page management, separate workspaces, and focused research match how you work. Choose another browser if you need Windows coverage or prefer a conventional tab-row interface, and weigh the $20 monthly entry point carefully if AI features are not central to your workflow.

Your product? Our editors can test SigmaOS in depth and publish a review, labelled as paid · from $149/mo →

SigmaOS pricing

Plans Free planFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 21 Sep 2026.
See plans on sigmaos.com

All 3 SigmaOS plans and prices →

SigmaOS fact sheet

Free planYes
Paid fromNot verified
Supported platformsDesktop
Browser engineWebkit
Built-in ad blockingYes
Tracking protectionNot verified
Extension supportBoth
Cross-device syncYes
Open sourceNot verified
Money-back guarantee14 days
DeploymentDesktop
PlatformsmacOS
Compliance & security2FA
SupportEmail, Community, Docs
Built forSolo, Small business (editorial estimate)
PricingFree plan (source)
Websitesigmaos.com
Facts checked21 Sep 2026

Alternatives to SigmaOS

See all SigmaOS alternatives →

Also Ranked In

SigmaOS is ranked in 2 of our directories.

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Featured on iTechGuides

Featured on iTechGuides — SigmaOS 3.0/10

SigmaOS is listed in our Web Browsers directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

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