SigmaOS

macOS work browser with workspaces and a free Personal plan

About SigmaOS

SigmaOS is a WebKit-based browser for macOS built around workspaces that separate projects, vertical tabs, split screen and a built-in ad blocker. Its Airis AI assistant can summarise pages and answer questions, with the free Personal plan covering everyday browsing and paid Pro tiers raising AI usage limits.

SigmaOS website preview

Live preview of sigmaos.com via the WordPress mShots service — it can take a few seconds to generate on a first visit.

SigmaOS: strengths & things to check

Strengths

Free tier available — you can start without paying (freemium model).
Covers web browser, macos, workspaces, ai assistant — see the focus areas listed in its key facts.
Has 6 close alternatives in the same category on this page, so switching or comparing is easy.

Things to check

The full feature set sits behind a paid plan — check which limits the free tier carries on the official site before committing.
Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
It is one of 1194 tools in the Utilities & Security category here — compare it against the alternatives below before you commit.

Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.

SigmaOS pricing

Pricing model	Freemium — a free tier lets you start, and paid plans are available if you need more.
Free access	Yes — free tier, paid upgrades available
Current plan prices	Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale.
Official site	sigmaos.com

SigmaOS key facts

Category: Utilities & Security
Pricing: Freemium — a free tier lets you start, and paid plans are available if you need more.
Focus areas: web browser, macos, workspaces, ai assistant
Official site: sigmaos.com

SigmaOS FAQ

How much does SigmaOS cost?

Freemium — a free tier lets you start, and paid plans are available if you need more. Current plans and prices are listed on the official site (sigmaos.com).

What is SigmaOS used for?

macOS work browser with workspaces and a free Personal plan Its focus areas in the Utilities & Security category: web browser, macos, workspaces, ai assistant.

Where can I try SigmaOS?

On its official site, sigmaos.com — the Visit Official Site button above goes straight there.

SigmaOS vs alternatives

	SigmaOS	Zen Browser	Amethyst	AppCleaner
Pricing	Freemium — a free tier lets you start, and paid plans are available if you need more.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas	web browser, macos, workspaces, ai assistant	web browser, firefox fork, workspaces, vertical tabs	window manager, macos, tiling, open source	uninstaller, macos, cleanup, free
Official site	sigmaos.com	zen-browser.app	ianyh.com	freemacsoft.net
Directory status	Listed	Listed	Listed	Listed

Side-by-side from each listing's own directory data. Full alternative cards are below.

About the Utilities & Security category

Password managers, cloud storage, and VPNs for everyday digital security. The Utilities & Security category on Tools Hub currently lists 1194 tools. Alongside SigmaOS, it includes Waterfox, Floorp, Pale Moon, LibreWolf.

FreemiumUtilities & Securityweb browsermacosworkspacesai assistant

Alternatives to SigmaOS

Tools in the same Utilities & Security category that share focus areas with SigmaOS — worth comparing before you commit:

Utilities & Security

Zen Browser

Firefox-based browser with vertical tabs and workspaces, donation-funded

Freeweb browserfirefox forkworkspacesvertical tabs

Utilities & Security

Amethyst

Automatic tiling window manager for macOS

Freewindow-managermacostilingopen-source

Utilities & Security

AppCleaner

Thoroughly uninstall Mac apps and their leftover files

Freeuninstallermacoscleanupfree

Utilities & Security

Bartender

Take control of your Mac menu bar icons

Paidmenu-barmacosorganizationutility

Utilities & Security

Basilisk

Free, open-source browser with a classic pre-Quantum Firefox interface

Freeweb browseropen sourcexulclassic interface

Utilities & Security

BetterTouchTool

Customize trackpad, mouse, keyboard, and Touch Bar on Mac

Paidmacosgesturesshortcutscustomization

More in Utilities & Security

Comparing tools in the Utilities & Security category? These related listings are worth a look: Waterfox — Free, open-source Firefox fork with no telemetry and no premium tier; Floorp — Free, open-source Firefox-based browser built for customisation; Pale Moon — Open-source browser on its own Goanna engine, free forever.