BrowserOS vs Comet

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

BrowserOS is an open-source Chromium agent browser for Mac, Windows and Linux. Its agent runs on the AI you connect: an API key, a ChatGPT or Copilot plan, Claude Code or Codex, or a local model.

Comet is Perplexity’s free Chromium browser for Mac, Windows, iPhone and Android, with Perplexity’s search and an assistant that can act on pages for you.

The short answer

Pick BrowserOS

if you want an open-source agent browser on your own AI keys or local models
if you want Claude Code, Codex or Cursor to drive a signed-in browser over MCP
if you use Linux

Pick Comet

if you use Perplexity and want its search and agent in the browser
if you want one AI browser on Mac, Windows, iPhone and Android
if you want a free Chromium browser with an ad blocker built in

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

BrowserOS and Comet, with Yab beside them for a Mac.

BrowserOS vs Comet
What	BrowserOS	Perplexity Comet	Yab
Made by	Felafax, Inc.	Perplexity	Serafim Korablev
Status	Updated	Updated	Updated
Runs on	Mac, Windows and Linux	Mac, Windows, iPhone and Android	Mac
Phone app	None; desktop only, and no Android plans as of May 2026	iPhone, iPad and Android; on iPhone it syncs bookmarks and history with desktop Comet	Not yet
Price	Free and open source; you pay your own AI provider	Free; Comet Plus $5/month; Perplexity Pro $20/month or Max $200/month for more AI and agent use	Free; its AI runs on your own Claude or ChatGPT plan
AI	An agent that works in pages, on its own AI or yours	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	MCP and a command line	No	MCP and a command line
Engine	Chromium	Chromium	WebKit
Tabs down the side	Yes	Not stated	Yes
Spaces	No	Not stated	Yes
Split View	Yes	Yes	Yes
Extensions	Chrome Web Store	Chrome Web Store	Chrome Web Store
Ad blocker	No	Built in	Built in
Open source	Yes	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.

AIa matter of taste

Both have an agent that works in your pages. BrowserOS’s agent, in the new tab and side panel, clicks, types, fills forms and pulls out data, on the AI you connect. Comet’s assistant answers about pages and open tabs and can click, fill forms and navigate for you, asking before it acts.

Agents like Claude Code and CodexBrowserOS leads

BrowserOS can be driven over MCP and a command line, through a built-in MCP server with one-click setup for Claude Code, Codex and Cursor, and a command line. Comet has no MCP server or command line for outside agents.

Tabs and windowsBrowserOS leads

BrowserOS has tabs down the side, Split View and folders in the sidebar. Comet has Split View, folders in the sidebar and tabs that sleep.

PriceBrowserOS leads

BrowserOS: Free and open source; you pay your own AI provider. Comet: Free; Comet Plus $5/month; Perplexity Pro $20/month or Max $200/month for more AI and agent use.

Where it runsComet leads

BrowserOS runs on Mac, Windows and Linux. Comet runs on Mac, Windows, iPhone and Android. On a Mac, Comet needs macOS 13 or later. BrowserOS has no phone app: desktop only, and no Android plans as of May 2026. On the phone, Comet: iPhone, iPad and Android; on iPhone it syncs bookmarks and history with desktop Comet.

Engine and extensionsa matter of taste

Both are built on Chromium, as Chrome is, so sites work as they do in Chrome. Both take extensions from the Chrome Web Store.

Privacyeven

BrowserOS has open code. BrowserOS sends prompts and pages only to the AI you connect, or keeps them local with Ollama or LM Studio; it sends anonymous usage analytics. Comet has an ad blocker built in. Comet keeps history, cookies and passwords on your device unless you sync; the assistant sends the page it needs to Perplexity, kept up to 30 days.

What their pages don’t lead with

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

BrowserOS

No built-in model since version 0.51: connect a provider before the agent works
Its own docs say local models are too weak for agent tasks
Before 1.0 and changing fast: Skills and Memory were pulled in June 2026
No phone apps

Perplexity Comet

Free use of the assistant is limited; more agent use is Pro at $20 or Max at $200
No MCP server or command line from Perplexity for coding agents
Researchers showed prompt-injection attacks on its agent in 2025 (CometJacking)

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

October 5, 2026BrowserOS: Built-in model and account sign-in removed; Chromium 155 (0.51.0)
August 4, 2026Comet: Ninth Circuit vacated the injunction Amazon won against Comet’s shopping agent
June 17, 2026BrowserOS: Claude Code and Codex built into the agent; Skills and Memory removed (0.46.0)
March 18, 2026Comet: Comet for iPhone released
March 9, 2026BrowserOS: Vertical tabs became the default (0.42.0)
October 2, 2025Comet: Browser made free for everyone worldwide

Questions

Is BrowserOS free?

Yes. Free and open source; you pay your own AI provider.

Is Perplexity Comet free?

Yes, with limits on its AI. Free; Comet Plus $5/month; Perplexity Pro $20/month or Max $200/month for more AI and agent use.

Which has an AI agent, BrowserOS or Comet?

Both. BrowserOS’s agent, in the new tab and side panel, clicks, types, fills forms and pulls out data, on the AI you connect. Comet’s assistant answers about pages and open tabs and can click, fill forms and navigate for you, asking before it acts.

Do BrowserOS and Comet run on Windows?

Yes, both. BrowserOS runs on Mac, Windows and Linux; Comet on Mac, Windows, iPhone and Android.

Do BrowserOS and Comet have phone apps?

Comet does. BrowserOS has no phone app: desktop only, and no Android plans as of May 2026. On the phone, Comet: iPhone, iPad and Android; on iPhone it syncs bookmarks and history with desktop Comet.

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 BrowserOS; an agent in your signed-in tabs like BrowserOS’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

BrowserOS vs Dia BrowserOS vs Atlas BrowserOS vs Opera Neon BrowserOS vs Aside BrowserOS vs Chrome BrowserOS vs Safari BrowserOS vs Edge BrowserOS alternatives Yab vs BrowserOS Comet vs Dia Atlas vs Comet Opera Neon vs Comet Aside vs Comet Comet vs Chrome Comet vs Safari Comet vs Edge Comet alternatives Yab vs Comet

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 Comet Download