Best AI Browsers: Comet, Gemini in Chrome, Claude in Chrome, Neon and Dia Scored

The browser became an agent in 2026. Chrome can now click through a checkout for you, Comet runs multi-step tasks on your phone, and OpenAI shut down its own browser after nine months. This guide covers the AI browsers worth shortlisting, scores them on what matters to a team rather than a demo, and lists the prices as published in October 2026.

What makes a browser agentic

An AI browser has an assistant that reads the page with you. An agentic browser lets the assistant act: it scrolls, clicks, types and moves between sites until a task is done, usually inside the sessions you are already logged into. That is why the category splits cleanly on one question: can the AI submit a form? Comet, Gemini in Chrome with auto browse, Claude in Chrome and Opera Neon can. Firefox's Smart Window and Brave Leo are assistants. Vivaldi has said it will not add agentic features at all.

Acting with your logins creates the category's defining risk. Text on any page can carry instructions the model may follow. Brave's researchers demonstrated an account takeover chain against Comet in August 2025, and Gartner's December 2025 report told security teams to block AI browsers for now. Every vendor below has shipped defenses since, which is why the scores weight control and safety as heavily as features.

The scores

Four criteria, 1 to 5 each, from vendor documentation and announcements through October 31, 2026. These are editorial assessments of published capabilities, not benchmark results.

• Agent: how much the agent can do without help, across sites and multi-step tasks.
• Control: what an administrator can enforce: deployment, domain allow-lists, turning actions off.
• Safety: injection defenses and human checkpoints built into the design.
• Reach: platforms, regions and the cost of getting started.

The browsers

Perplexity Comet

Comet is the agent-first browser with the widest footprint: desktop since July 2025, Android since November 2025 and iOS since March 2026. Its assistant fills forms, compares products, and handles multi-step jobs such as bookings and email. The browser is free; Perplexity Pro ($20 a month) and Max ($200 a month) raise limits and include Comet Plus, Perplexity's publisher content bundle. What sets it apart for teams is Comet Enterprise: a silent installer for MDM rollouts, and a policy that lets admins allow answers only, or allow actions only on approved domains. Best fit: teams that want a dedicated agent browser with real admin controls. Full Comet review.

Gemini in Chrome (auto browse)

Google added auto browse to Chrome on January 28, 2026. Gemini works in a separate, visibly marked tab, scrolling, clicking and typing while you browse elsewhere, and reports its steps in the side panel. The design keeps the irreversible click with you: Gemini prepares a purchase or social post, and you press the button. Password autofill needs your approval, and there is a daily action limit. Auto browse needs Google AI Pro ($20 a month) or AI Ultra (cut to $100 a month in May 2026) and is US only; it reached Android in late June. Best fit: Chrome shops that want an agent without a browser migration. Full Gemini in Chrome review.

Claude in Chrome

Anthropic's extension acts on sites and fills forms from a Chrome side panel. It became generally available on August 26, 2026 for paid Claude plans, and with that release Anthropic replaced per-action approvals with a safety classifier that checks each action against your instructions, plus probes that scan pages for injected instructions before Claude reads them. On Team and Enterprise plans, admins can switch it off for the organization and set site allow-lists and block-lists; the same lists govern the separate, agent-owned browser in Claude's Cowork desktop app, which does not use your own logins. Best fit: teams already on Claude that want agent browsing under the same admin console. Full Claude in Chrome review.

Opera Neon

Neon is Opera's agentic browser. It routes each request to a mode: Chat, Do (act on pages), Make (build something) or a one-minute research run. It added a free plan in August 2026, alongside a paid plan of about $20 a month for Neon's own AI, and it can be driven by outside agents, including as an MCP server. Enterprise controls are not documented. Best fit: individuals and builders experimenting with agents. Full Opera Neon review.

Dia

Dia, from The Browser Company (now part of Atlassian), is an AI assistant built into the browser rather than an autonomous agent: it works across your tabs, answers on the page and drafts text. In August 2026 it moved AI features to paid plans for new Mac users: $20 a month for core AI features and $100 a month for Reports, Morning Brief and higher limits, with a free plan that has no AI. Windows is in beta. Best fit: knowledge workers on Mac who want a smarter browser more than an agent. Full Dia review.

Microsoft Edge

Microsoft retired the Copilot Mode brand in May 2026 and folded its AI features into Edge itself, including reasoning across tabs and voice and vision controls. For IT teams the strength is control: Edge logs AI queries in a privacy dashboard and can switch all AI features off with one policy. Best fit: Microsoft 365 organizations that want AI help under existing browser management.

Also worth knowing

• ChatGPT Atlas is gone: OpenAI retired it on August 9, 2026 and moved agent features to the ChatGPT desktop app and Chrome extension.
• Firefox Smart Window adds web-aware chat and tab grouping and can be disabled centrally; Firefox has had an enterprise kill switch for generative AI since Firefox 148.
• Fellou, Genspark and Sigma are standalone agentic browsers; Fellou lets you edit a workflow before it runs (Fellou review).
• Browser Use, Browserbase and Stagehand are infrastructure for developers building their own browser agents, a different buying decision, covered in browser automation for AI agents.

Landscape details from the nohacks.co agentic browser tracker (updated September 2026) unless linked otherwise.

How to choose

1. Decide whether you need an agent. If people mostly want summaries and drafting, an assistant browser such as Dia or Edge carries far less risk.
2. Start from the browser you manage. Chrome and Edge shops can trial the built-in or extension agent under existing policy before adding a new browser.
3. Shortlist on controls. Require domain allow-lists, a way to disable actions, and human confirmation for purchases and sends. Comet Enterprise and Claude's Team and Enterprise plans document these today.
4. Separate agent browsing from real sessions. A profile or agent-owned browser with no corporate logins removes most of the damage a hijacked agent can do.
5. Put an expiry on approvals. Atlas lasted nine months. Name the product version and review it quarterly.

Related questions

• Should a company block, sandbox or pilot agentic browsers? (partner site CTAIO)
• Comet, Gemini in Chrome or Claude in Chrome: which agent fits?
• What is agentic search, and how do agents read your site?
• Which vendors secure AI agents?
• What is agentic commerce?

Sources

• Brave, Agentic browser security: indirect prompt injection in Perplexity Comet (Aug 20, 2025).
• Forcepoint, Gartner recommends blocking AI browsers (Dec 10, 2025), summarizing Gartner's Cybersecurity Must Block AI Browsers for Now.
• 9to5Google, Chrome Gemini auto browse (Jan 28, 2026).
• Perplexity, Comet Enterprise is here (Mar 2026); Carly, Perplexity pricing (Jul 2026).
• Gigazine, Claude in Chrome generally available (Aug 27, 2026); Anthropic, Claude in Chrome admin controls.
• Notebookcheck, ChatGPT Atlas ends on August 9 (Jul 2026).
• PiunikaWeb, Dia announces monthly AI plans (Aug 18, 2026).
• Framia, Google cuts AI Ultra to $100 a month (May 2026).
• nohacks.co, The agentic browser landscape in 2026 (updated Sep 27, 2026).

Related reading on our partner sites: prompt injection explained on CTAIO and AI governance for executives on aistrategy.guide.

What is the best AI browser in 2026?

For most teams, Perplexity Comet: it is free, runs on Mac, Windows, Android and iOS, completes multi-step tasks, and has an enterprise version with MDM deployment and domain-level limits on agent actions. If you are standardized on Chrome, Gemini in Chrome with auto browse or Claude in Chrome adds an agent without switching browsers. For a polished AI assistant without much autonomy, Dia is the knowledge-worker pick on macOS.

What is the difference between an AI browser and an agentic browser?

An AI browser adds an assistant that can summarize the page, answer questions across tabs and draft text. An agentic browser lets that assistant act: click, type, fill forms and finish multi-step tasks across sites. Comet, Gemini auto browse, Claude in Chrome and Opera Neon are agentic. Firefox's Smart Window and Brave Leo are assistants. The difference matters for security because an agent acts with your logged-in access.

Are AI browsers free?

Some are. Comet is free to download, with Perplexity Pro ($20 a month) and Max ($200 a month) adding higher limits. Opera Neon added a free plan in August 2026. Gemini's auto browse needs a Google AI Pro or Ultra subscription in the US. Claude in Chrome needs a paid Claude plan. Dia's AI features moved to $20 and $100 monthly plans for new Mac users in August 2026, with a free plan that has no AI features.

Is ChatGPT Atlas still available?

No. OpenAI announced on July 9, 2026 that it would retire ChatGPT Atlas, and the browser stopped working on August 9, 2026. Its agent features moved to the ChatGPT desktop app and the ChatGPT extension for Chrome.

Are agentic browsers safe to use at work?

Not on default settings with corporate logins in the same session. Any page the agent reads can contain hidden instructions, and the agent acts with your credentials. Use an enterprise build that limits actions to approved domains, keep purchases and sends behind a human click, and run agent browsing in a separate profile without corporate logins. Our partner site CTAIO has a full policy guide for CTOs.