Tabbit vs Vivaldi

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

Tabbit is a free Chromium AI browser for Mac and Windows from Lumina Lab in Singapore, with chat, an agent mode and a choice of many vendors’ models.

Vivaldi is a Chromium browser with a setting for nearly everything, mail, calendar and feeds built in, a free Proton VPN and no AI by design, on every desktop and phone.

The short answer

Pick Tabbit

if you want a free agent browser with a wide choice of models, Chinese ones included
if you want the same AI browser on Windows and Mac
if you want Codex or Claude Code to use your signed-in sessions through its command line

Pick Vivaldi

if you want mail, calendar, feeds, notes and a VPN in the browser
if you want to customize nearly everything, and no AI
if you need one browser on Mac, Windows, Linux, iPhone and Android

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

Tabbit and Vivaldi, with Yab beside them for a Mac.

Tabbit vs Vivaldi
What	Tabbit	Vivaldi	Yab
Made by	Lumina Lab (LUMINALAB PTE. LTD., Singapore)	Vivaldi Technologies	Serafim Korablev
Status	Updated	Updated	Updated
Runs on	Mac and Windows	Mac, Windows, Linux, iPhone and Android	Mac
Phone app	Only for its Chinese edition, in Chinese; tabbit.ai lists mobile as planned	iPhone, iPad and Android; syncs tabs, bookmarks, passwords, history and notes	Not yet
Price	Free with a weekly AI allowance; Pro $30/month	Free; its Proton VPN is free with a Vivaldi account	Free; its AI runs on your own Claude or ChatGPT plan
AI	An agent that works in pages, on its own AI service	No AI	An agent that works in pages, on your Claude or ChatGPT plan
Driven by outside agents	a command line	No	MCP and a command line
Engine	Chromium	Chromium	WebKit
Tabs down the side	Yes	A setting	Yes
Spaces	Not stated	Yes	Yes
Split View	Yes	Yes	Yes
Extensions	Chrome Web Store	Chrome Web Store	Chrome Web Store
Ad blocker	Built in	Built in	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.

AITabbit leads

Only Tabbit has an agent that clicks, types and finishes tasks in your pages. Tabbit chats with your tabs, files and screenshots, and its agent mode runs multi-step tasks in tab groups of its own, on GPT, Claude, Gemini, DeepSeek, Kimi, Qwen or GLM. Vivaldi has no AI chat, summaries or agents, by choice.

Agents like Claude Code and CodexTabbit leads

Tabbit can be driven over a command line, through the Tabbit command line, with a skill for Codex, Claude Code and Cursor. Vivaldi has no MCP server or command line for outside agents.

Tabs and windowseven

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

PriceTabbit leads

Tabbit: Free with a weekly AI allowance; Pro $30/month. Vivaldi: Free; its Proton VPN is free with a Vivaldi account.

Where it runsVivaldi leads

Tabbit runs on Mac and Windows. Vivaldi runs on Mac, Windows, Linux, iPhone and Android. On a Mac, Tabbit needs macOS 13 or later and Vivaldi needs macOS 13 or later. On the phone, Tabbit: only for its Chinese edition, in Chinese; tabbit.ai lists mobile as planned. On the phone, Vivaldi: iPhone, iPad and Android; syncs tabs, bookmarks, passwords, history and notes.

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.

PrivacyVivaldi leads

Tabbit has an ad blocker built in. Tabbit sends prompts and pages you share to the model vendor you pick, on servers in Singapore or your region; its maker says it doesn’t train on your data. Vivaldi has an ad blocker built in and a VPN. Vivaldi sends a daily ping with a unique ID, version and rough location to count users; crash logs only if you opt in.

What their pages don’t lead with

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

Tabbit

Top models and heavy agent use need Pro at $30 a month
The free AI is a weekly allowance, larger only if Tabbit is your default browser
No Linux or phone apps yet
No MCP server documented, only its command line

Vivaldi

No AI assistant or agent, by design
Tabs down the side are a setting, not the default
Its interface code isn’t open source
Sends a daily usage ping with a unique ID

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

September 8, 2026Tabbit: Tabbit CLI lets coding agents drive the browser with your logins
August 21, 2026Tabbit: Version 1.11 dropped macOS 12; macOS 13 or later required
June 9, 2026Tabbit: Version 1.0 released after a 100-day public beta
May 21, 2026Vivaldi: Vivaldi 8.0 redesigned the interface
January 29, 2026Vivaldi: Vivaldi 7.8 restated its no-AI stance
March 27, 2025Vivaldi: Proton VPN built into Vivaldi on desktop

Questions

Is Tabbit free?

Yes, with limits on its AI. Free with a weekly AI allowance; Pro $30/month.

Is Vivaldi free?

Yes. Free; its Proton VPN is free with a Vivaldi account.

Which has an AI agent, Tabbit or Vivaldi?

Tabbit. Tabbit chats with your tabs, files and screenshots, and its agent mode runs multi-step tasks in tab groups of its own, on GPT, Claude, Gemini, DeepSeek, Kimi, Qwen or GLM. Vivaldi has no AI chat, summaries or agents, by choice.

Do Tabbit and Vivaldi run on Windows?

Yes, both. Tabbit runs on Mac and Windows; Vivaldi on Mac, Windows, Linux, iPhone and Android.

Do Tabbit and Vivaldi have phone apps?

On the phone, Tabbit: only for its Chinese edition, in Chinese; tabbit.ai lists mobile as planned. On the phone, Vivaldi: iPhone, iPad and Android; syncs tabs, bookmarks, passwords, history and notes.

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

Tabbit vs Dia Tabbit vs Comet Tabbit vs Atlas Tabbit vs Opera Neon Tabbit vs Chrome Tabbit vs Safari Tabbit vs Edge Tabbit alternatives Yab vs Tabbit Vivaldi vs Arc Zen vs Vivaldi Orion vs Vivaldi SigmaOS vs Vivaldi Vivaldi vs Chrome Vivaldi vs Safari Vivaldi vs Edge Vivaldi alternatives Yab vs Vivaldi

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 Vivaldi Download