SigmaOS vs Edge

We make Yab, the third column.facts checked Oct 9 ↓

SigmaOS is a Mac browser on WebKit that treats tabs like a to-do list, in workspaces down the side, with an AI assistant called Airis.

Edge is Microsoft’s Chromium browser on every desktop and phone, with Copilot built in. Since Copilot Mode was retired in May 2026, its agent, Browse with Copilot, comes with Microsoft 365 Premium in the US.

The short answer

Pick SigmaOS

if you want workspaces and tabs you mark done, on a Mac
if you browse by keyboard, with single-key shortcuts
if you prefer WebKit to Chromium and want spaces

Pick Edge

if you use Microsoft 365 and want Copilot in the browser
if you want tabs down the side, workspaces, split screen and sleeping tabs built in
if you work on Windows with Edge set up by your company

Or Yabours

if you miss Arc and want spaces, pins and folders kept, on a Mac
if you already pay for Claude or ChatGPT and want it to work in your signed-in tabs
if you want Claude Code, Codex or Cursor to drive a real browser over MCP

At a glance

SigmaOS and Edge, with Yab beside them for a Mac.

SigmaOS vs Edge
What	SigmaOS	Microsoft Edge	Yab
Made by	SigmaOS Inc. (London)	Microsoft	Serafim Korablev
Status	No release notes since February 2025	Updated	Updated
Runs on	Mac	Mac, Windows, Linux, iPhone and Android	Mac
Phone app	None; Mac only. iOS has been on its roadmap since 2021	iPhone, iPad and Android; syncs tabs, favorites, passwords and history	Not yet
Price	Free; Personal Pro $20/month or Personal Max $30/month for more AI	Free, with Copilot; Browse with Copilot needs Microsoft 365 Premium $19.99/month (US)	Free; its AI runs on your own Claude or ChatGPT plan
AI	Chat about pages, on its own AI service	An agent that works in pages, on its own AI service	An agent that works in pages, on your Claude or ChatGPT plan
Driven by outside agents	No	MCP and a command line	MCP and a command line
Engine	WebKit	Chromium	WebKit
Tabs down the side	Yes	A setting	Yes
Spaces	Yes	Yes	Yes
Split View	Yes	Yes	Yes
Extensions	Chrome Web Store	Chrome Web Store	Chrome Web Store
Ad blocker	Built in	No	Built in
Open source	No	No	No

Checked October 9, 2026 on each maker’s own pages, linked under Sources. Prices are per month, in US dollars.

Where they differ

What separates them, area by area. Where one plainly has more, it says who; where it comes down to taste, it says so.

AIEdge leads

Only Edge has an agent that clicks, types and finishes tasks in your pages. Airis chats about the page you are on, sums it up, looks things up and translates; no agent. Copilot reads the page, your tabs and history and sums up videos and PDFs; Browse with Copilot scrolls and types in pages for you, signed in, on Microsoft 365 Premium in the US.

Agents like Claude Code and CodexEdge leads

SigmaOS has no MCP server or command line for outside agents. Edge can be driven over MCP and a command line, through Microsoft’s Playwright MCP, which can launch Edge or attach to your running Edge.

Tabs and windowseven

SigmaOS has tabs down the side, spaces and Split View. Edge has tabs down the side as a setting, spaces, Split View, folders in the sidebar and tabs that sleep.

Priceeven

SigmaOS: Free; Personal Pro $20/month or Personal Max $30/month for more AI. Edge: Free, with Copilot; Browse with Copilot needs Microsoft 365 Premium $19.99/month (US).

Where it runsEdge leads

SigmaOS runs on Mac. Edge runs on Mac, Windows, Linux, iPhone and Android. On a Mac, SigmaOS needs macOS 12 or later and Edge needs macOS 13 or later. SigmaOS has no phone app: Mac only. iOS has been on its roadmap since 2021. On the phone, Edge: iPhone, iPad and Android; syncs tabs, favorites, passwords and history.

Engine and extensionsa matter of taste

SigmaOS is built on WebKit, the engine Safari uses; Edge on Chromium, as Chrome is. Both take extensions from the Chrome Web Store.

Privacyeven

SigmaOS has an ad blocker built in. SigmaOS keeps history and cookies on your Mac unless you turn on sync, stored encrypted on AWS; its privacy policy doesn’t say where Airis requests go. Edge has a VPN. Copilot may use your question, the page, your open tabs and history; Browse with Copilot keeps screenshots up to 30 days, not for training, Microsoft says.

UpdatesEdge leads

SigmaOS: Still downloadable, with no public release notes since version 1.19 in February 2025. Edge is updated as usual.

What their pages don’t lead with

Real limits, from the makers’ own words and our own use.

SigmaOS

Mac only
No public release notes since version 1.19 in February 2025
Chrome extensions only partly work, behind its WebKit+ option
Its AI is an assistant, and regular use needs the $20 or $30 plans

Microsoft Edge

Browse with Copilot needs Microsoft 365 Premium ($19.99 a month) and is US only
Copilot reads pages, tabs and history unless you turn it off
Workspaces lost sharing in 2026, and Collections were removed
No ad blocker of its own

Yab, honestly

Mac only: macOS 15.4 or later, no Windows, iPhone or Android
New: first released in September 2026
Its AI needs a Claude or ChatGPT plan; ChatGPT’s free plan may work with low limits
WebKit, as in Safari: a site tested only in Chrome can misbehave
Closed source

What changed lately

June 4, 2026Edge: Collections removed in Edge 149
May 13, 2026Edge: Copilot Mode retired; its features moved into Edge, and Copilot Actions became Browse with Copilot for Microsoft 365 Premium (US)
February 4, 2025SigmaOS: Version 1.19.0, a performance update, the last release with public notes

Questions

Is SigmaOS free?

Yes, with limits on its AI. Free; Personal Pro $20/month or Personal Max $30/month for more AI.

Is Microsoft Edge free?

Yes, with limits on its AI. Free, with Copilot; Browse with Copilot needs Microsoft 365 Premium $19.99/month (US).

Which has an AI agent, SigmaOS or Edge?

Edge. Airis chats about the page you are on, sums it up, looks things up and translates; no agent. Copilot reads the page, your tabs and history and sums up videos and PDFs; Browse with Copilot scrolls and types in pages for you, signed in, on Microsoft 365 Premium in the US.

Which runs on Windows, SigmaOS or Edge?

Edge does. SigmaOS runs on Mac.

Do SigmaOS and Edge have phone apps?

Edge does. SigmaOS has no phone app: Mac only. iOS has been on its roadmap since 2021. On the phone, Edge: iPhone, iPad and Android; syncs tabs, favorites, passwords and history.

Can I move from Edge to SigmaOS?

Yes: SigmaOS’s own help says it brings in from Edge.

Is SigmaOS still being updated?

Still downloadable, with no public release notes since version 1.19 in February 2025.

Is there a third option on a Mac?

Yab, Yet Another Browser, is free for the Mac: tabs down the side with spaces, folders and Split View, as in SigmaOS; an agent in your signed-in tabs like Edge’s, on the Claude or ChatGPT plan you already pay for. Claude Code, Codex and any MCP client can drive it too. It runs on WebKit, the engine Safari uses, and takes Chrome extensions. It is Mac only, and new.

More comparisons

SigmaOS vs Arc SigmaOS vs Vivaldi SigmaOS vs Zen SigmaOS vs Orion SigmaOS vs Chrome SigmaOS vs Safari SigmaOS vs Firefox SigmaOS alternatives Yab vs SigmaOS Edge vs Chrome Edge vs Safari Firefox vs Edge Brave vs Edge Opera vs Edge Arc vs Edge Dia vs Edge Edge alternatives Yab vs Edge

Sources, read October 9, 2026. Something out of date? Write to hello@serafimlabs.io and we fix it.

Yab, Yet Another Browser.

Free for the Mac. Arc’s sidebar, your own Claude or ChatGPT as the agent, Chrome extensions on WebKit.

it’s freeMove from Edge Download