Best AI Browsers and Browser Assistants in 2026
Browsers with AI built in, plus assistant extensions and browser agents, ranked for research and getting web tasks done.
11 tools · Last updated: September 2026
AI browsers and the assistants that live inside your browser. 11 tools: seven browsers with AI built in, two assistant extensions for the browser you already use, and two tools that automate browser work. OpenAI's ChatGPT Atlas, one of the best-known AI browsers, shut down on 9 August 2026.
Top picks
All AI Browsers and Assistants (11)
Comet
Perplexity's free AI browser with an assistant that works across your tabs
Gemini in Chrome
Google's Gemini assistant built into the Chrome browser
Dia
Mac AI browser from The Browser Company, makers of Arc
Opera Neon
Opera's agentic browser, free to download, with paid built-in agents
Fellou
Agentic browser that plans and runs multi-step web tasks and research
Arc Search
AI-first mobile browser from The Browser Company that…
Brave Leo
privacy-first AI assistant built into the Brave browser…
Merlin AI
AI assistant browser extension, access ChatGPT, Claude…
Sider
AI browser sidebar for ChatGPT, Claude, Gemini
Bardeen
AI browser automation with 200+ integrations and no-code…
BrowserAct
A real browser layer for AI agents: persistent sessions, reusable skills, and human handoff
The state of AI browsers in 2026
The AI browser became its own category in 2025, when Comet from Perplexity, Dia from The Browser Company, Opera Neon and OpenAI's ChatGPT Atlas all launched. A year on, the field has already changed: OpenAI deprecated ChatGPT Atlas and it stopped working on 9 August 2026, with its agent features moving into the ChatGPT desktop app and Codex. Comet is now free on Mac, Windows, iOS and Android, Dia has moved its AI features to paid plans on the Mac, and Opera made Neon a free download in August 2026, charging only for its own agents. The biggest browsers have caught up too: Gemini in Chrome puts Google's assistant into the browser most people already use.
How AI browsers work
An AI browser puts a language model next to every tab. It can read the page you are on, answer questions with sources, summarise long articles and compare several open pages. Agentic browsers go further and act for you: opening tabs, clicking through sites and filling in forms to finish a task, as Fellou and Opera Neon do, and Neon can also host agents you already use through MCP. Extensions such as Merlin AI and Sider bring a similar sidebar to Chrome and other browsers, while Bardeen and BrowserAct automate repetitive browser work for sales teams and AI agents.
What to look for when choosing an AI browser
Platform comes first: Comet runs on four platforms, Gemini in Chrome on Windows, Mac and Chromebook Plus, Opera Neon and Fellou on Windows and Mac, Dia only on Apple silicon Macs, and Arc Search on phones. Next, check what is free, because some browsers include their AI at no cost while others keep it, or their agent features, behind a subscription. Think carefully about privacy, since an assistant that reads your pages sees a great deal. And be cautious with agent features: web pages can hide instructions aimed at AI tools, a risk known as prompt injection, so supervise any agent that works inside logged-in accounts.
Common use cases
Researchers and students ask questions across several sources at once and get cited answers. Knowledge workers summarise long documents and turn tab sprawl into notes, reports or decks, and Chrome users do the same with Gemini without switching browsers. Marketing and operations teams hand multi-step web tasks and research to Fellou or Opera Neon. Mobile users let Arc Search browse for them and build an answer page. Privacy-minded users keep their assistant inside Brave. Sales teams automate lookups and data entry with Bardeen, and developers give AI agents a real browser with BrowserAct or Opera Neon.
Free vs paid AI browsers
Several options cost nothing: Comet is free, with an optional $5 a month Comet Plus for premium publisher content; Gemini in Chrome needs no subscription, although auto browse is a US preview for Google AI Pro and Ultra subscribers; Arc Search is a free download with no paid plan; and Brave Leo has a free tier with Leo Premium at $14.99 a month. Opera Neon is a free download, with its own agents on the $19.90 a month Standard plan, and Fellou has a free plan with a 1,000 Spark bonus and paid plans from $19 a month. Dia's browser is free, but its AI needs Better Answers at $20 a month or Better Days at $100 a month. Among extensions, Sider has a limited free tier with paid plans from $25 a month, and Bardeen includes 100 free credits a month.
Buying guides for this category
Hand-tested rankings with verified pricing and free-tier notes:
Frequently Asked Questions
What is the best AI browser in 2026?
For most people, Comet: it is free and runs on Mac, Windows, iOS and Android, with an assistant that works across your tabs. If you would rather keep Chrome, Gemini in Chrome adds Google's assistant to it. Mac users who want AI that also draws on work tools like Slack and Notion should look at Dia, whose AI features are paid.
What happened to ChatGPT Atlas?
OpenAI deprecated ChatGPT Atlas and it stopped working on 9 August 2026. OpenAI is moving browser-based agent features into ChatGPT and Codex, and points users to the ChatGPT desktop app and the ChatGPT Chrome extension or sidebar, where available.
Are AI browsers free?
Many are. Comet is free on every platform, Gemini in Chrome needs no subscription, Arc Search is a free mobile browser, Brave Leo has a free tier, and Opera Neon and Fellou have free plans with paid agent features. Dia is free as a browser, but its AI features need a paid plan from $20 a month.
Are AI browsers safe to use?
Treat them like any tool that reads your data. Check what the assistant can see and store, and supervise agent features on sensitive accounts, because web pages can contain hidden instructions aimed at AI tools.
Can I add AI to the browser I already use?
Yes. Chrome users can turn on Gemini in Chrome, Edge has Copilot built in, and extensions such as Merlin AI and Sider add an AI sidebar to Chrome and other browsers, so you can keep your current browser and still ask questions about any page.