SigmaOS review (2026): is the free plan enough?
Mac browser with vertical tabs, workspaces and an AI assistant
Black Friday: is there a SigmaOS sale?
SigmaOS report card
Fair · out of 4.0 · graded Nov 12, 2026
Best for a Mac browser with vertical tabs and an AI helper
SigmaOS is a Mac browser with vertical tabs, workspaces and an AI assistant called Airis. The browser is free, but unlimited Airis needs Pro at $20 a month, and it runs only on macOS.
Who SigmaOS is for
- Fits if you live on a Mac and want tabs down the side in separate workspaces
- Works for people who want an assistant that answers questions about the page
Who SigmaOS is not for
- Not for you if you use Windows or Linux, as it runs on macOS only
- Pricey if you want unlimited AI, which needs Pro at $20 a month
- Watch out: the help docs list an older Pro price of $10 a month, against $20 on the homepage
- Watch out: iOS and Windows versions are described as coming, and pages on the site carry a 2024 copyright notice
Why SigmaOS gets a 2.4
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- AValue for moneyThe Personal plan is described as free forever, so the browser costs nothing. Unlimited Airis needs Pro at $20 a month, which is where this category's dearest tenth starts.
- BFree plan and trialA free-forever plan one person could live on, with the AI helper limited rather than missing.
- CFeaturesWorkspaces, vertical tabs, search across tabs and an ad blocker. Unlimited AI use is Pro only, and the help docs list an older Pro price of $10 against the homepage's $20.
- CEase of useNo store rating on record. Workspaces, profiles and keyboard-first search take some learning.
- DPlatforms and integrationsmacOS only. The FAQ says iOS and Windows support are coming.
What these grades rest on. Graded from this listing, whose facts were read from SigmaOS's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
Make SigmaOS? Put this grade on your site
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<a href="https://toolgpa.com/tools/sigmaos#review"><img src="https://toolgpa.com/badge/sigmaos.svg" alt="SigmaOS: 2.4 GPA on ToolGPA" width="196" height="56"></a>Where SigmaOS stands among browsers
SigmaOS's GPA of 2.4 is higher than 5 of the 25 other browsers we grade, and level with 1.
It stands best on value for money (A, above 10 of 25) and worst on platforms and integrations (D, above 0).
Its paid plans start at $20 a month, against a middle price of $8.33 for the category: 9 of the 10 others that charge start lower.
On features, ease of use and platforms it scores 1.7 out of 4. 22 tools score higher and cost less.
Each grade against the category
Every bar is all 26 browsers we grade, cut by the letter each got. SigmaOS’s own letter is outlined.
- AValue for moneyAbove 10 of 25, level with 15
- BFree plan and trialAbove 6 of 25, level with 1
- CFeaturesAbove 0 of 25, level with 13
- CEase of useAbove 0 of 25, level with 7
- DPlatforms and integrationsAbove 0 of 25
Price against what you get
Each dot is one of 24 browsers. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep SigmaOS, or make your own?
Keep it
To replace SigmaOS you would be making a web browser. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 19 of the 25 other browsers grade higher. It costs $240 a year.
What you could make
- Ad and tracker blocking: an app builder makes this well.
What you could not
- A web browser.
- A real app for macOS. Something home-made would be a web page.
- It plugs into other products, Apple Keychain, 1Password and Bitwarden among them.
- AI features, unless you pay a model provider for each request yourself.
What this rests on. SigmaOS’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is SigmaOS?
SigmaOS is a browser for macOS built on Apple's WebKit engine that also supports Chromium extensions. It uses vertical tabs and workspaces, treats tabs like tasks you can mark done, and has single-key shortcuts, split screen and an AI companion called Airis. A free Personal plan exists, and a paid Pro plan adds unlimited Airis use.
Worth knowing
- It runs only on macOS; the FAQ says iOS and Windows support are coming.
- Unlimited Airis usage needs the paid Pro plan.
- The company's help docs list an older Pro price of $10 per month ($8 billed yearly); the homepage FAQ says $20 a month. Check the price in the app before buying.
- Pages on the site carry a 2024 copyright notice.
Key features
- Workspaces and vertical tabs
- Tabs are kept in separate workspace lists down the side of the window, and a workspace can use separate profiles to sign in to different accounts.
- Tabs as tasks
- Tabs can be marked as done when finished or locked to a workspace to keep them.
- Lazy Search
- Pressing the spacebar searches across open tabs, the web, commands and bookmarks.
- Airis assistant
- The AI companion can answer questions about the page you are on, search the web and read several pages at once, and a Simplify view summarizes a page.
- Ad blocker and Focus Mode
- A built-in ad blocker is included, and Focus Mode hides everything except the current page.
- Chromium extensions
- The FAQ says SigmaOS is a WebKit browser that also supports Chromium extensions.
SigmaOS pricing
As of Nov 12, 2026, SigmaOS has a free plan, and paid plans start at $20 per month (Pro).
- Starts at
- $20 per month (Pro)
- Free plan
- SigmaOS Personal is described as free forever; unlimited Airis AI usage is a Pro feature.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Personal | $0 | The browser for macOS, free, without unlimited Airis AI usage. |
| Pro | $20per month; billing basis not stated on the page | Unlimited Airis usage. The site says Pro starts at this price and gives students and educators 50% off. |
Read from sigmaos.com on Nov 12, 2026. Prices change, so confirm with SigmaOS before you buy.
Ways to pay less
- Education50% off Pro for students and educators
The homepage FAQ says students and educators are eligible for a 50% discount on SigmaOS Pro.
Stated on sigmaos.com
Works with
- Apple Keychain
- 1Password
- Bitwarden
- Dashlane
- LastPass
SigmaOS alternatives
- SigmaOS vs Arc
Free
- SigmaOS vs Dia
Free plan · from $10/mo
- SigmaOS vs Orion
Free plan · from $5/mo
Common questions
Does SigmaOS have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. SigmaOS is listed for macOS.
Does SigmaOS have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. SigmaOS is listed for macOS.
Is SigmaOS open source?
SigmaOS is not described as open source on its own site, as read on Nov 12, 2026.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.