What is the best AI browser in 2026?

Comet is Perplexity's browser. Perplexity opened it to everyone, for free, in 2025, and it now runs on Mac, Windows, iOS and Android. Every new tab holds the Comet Assistant: ask about the page or your tabs, for free. To have it act (fill a form, compare three product pages, draft a reply from an email thread) you need a paid plan: Perplexity's plan table gives the free tier no browser agent queries and only 3 Pro Searches a day.

The day-to-day win is context. Comet reads the page you are on and your other tabs, so "summarize these four reviews and tell me which ones list prices" works in one sentence. User feedback matches that: in 2025, a developer described moving his liked songs from Spotify to Apple Music with Comet in a few minutes. Comet is built on Chromium, and setup transfers your browsing data from Chrome.

The catch is security. In 2025, Brave's researchers showed that Comet passed part of the web page to its model without separating it from your instructions, so hidden text on a page could act as a command. The risk applies to every agent: don't hand it your work inbox or bank account unsupervised. In 2026, public reviews of Perplexity mostly complain about billing and cancelling subscriptions, not the browser.

Tip: create a separate Comet profile for agent tasks, with no sensitive accounts signed in. Keep your main profile for everyday browsing.

Dia is made by The Browser Company, the team behind Arc, which Atlassian (the maker of Jira and Confluence) agreed to buy in 2025. Arc no longer gets new features: the whole team works on Dia. It runs on macOS and Windows. The idea is that AI lives in the address bar and reads your context, meaning your open tabs and the tools you connect.

The headline feature is the Morning Brief: every morning, Dia pulls together your calendar, inbox and key links. It can also gather what is scattered across Slack, Notion and Teams into a report you can share. For a project lead or consultant, it is the browser that feels most like an office assistant.

Pricing is easy to read. For a new Mac user, Free gives you a clean browser with no AI features. Paid plans start with new Mac users: Dia on Windows stays as it is for now, and existing users get at least 30 days' notice before anything changes. Every new user gets a 14-day trial of Better Days with no credit card, which is the time to see whether the Morning Brief earns its keep. Better Answers costs $10 a month ($120 over a year) and Better Days $100 a month, with 20 times more asks. A rare good call: if you run out, Dia doesn't bill overage, the AI pauses until your next cycle. You can also add usage in $20 credit blocks, which stay usable for up to three months.

The catch: no mobile app, and a heavy install. A long hands-on review published in Spain in 2026 ranks it ahead of Comet and Atlas on polish, while noting its size (about a gigabyte). Arc fans also miss Spaces and the vertical sidebar, which Dia only partly brings back.

Tip: connect just two tools at first (calendar and email). The Morning Brief is more useful short than buried under ten sources.

Edge ships with every Windows PC, and Copilot is built in. A side pane summarizes the page, compares your tabs or drafts text, and a Copilot new tab page can replace the default start page. Journeys groups your browsing by topic (pages, searches, chats) so you can pick up where you left off.

Copilot Mode in Edge is free for every signed-in user on Windows and Mac, in the markets where Copilot is offered. It adds Copilot Actions, the agent that acts on pages. Paid Copilot subscribers get higher limits on Actions and Vision, and a Microsoft 365 subscription unlocks premium AI features. If you already pay for Microsoft 365 on Windows, this is the lowest-effort option: nothing to install. One catch: Copilot Mode and its Actions are for consumers only, so a work or school account doesn't get them.

The catch: free users get lower limits on Actions and Vision than subscribers. Copilot is still first an assistant for reading, comparing and writing. Everything runs through your Microsoft account, which won't suit people who want to keep AI and personal life apart.

Tip: turn on Journeys from the new tab page. After a week of researching a purchase or a trip, everything is grouped in one click.

You don't need a new browser to get an AI one: Gemini is built into Chrome on Mac, Windows and Chromebook Plus. Click the Gemini icon and it reads the current page, or up to 10 open tabs you share with it. It works with your Google apps too, so it can find a flight time in Gmail, check it in Google Flights and draft a note to friends without switching tabs.

The agent part is called auto browse. Tell Gemini what you need (book an appointment, plan a party) and it browses on your behalf. It is limited to users 18 or over in the US, with the device language set to English, on a Google AI Plus, Pro or Ultra plan. The cheapest way in is AI Plus at $4.99 a month; AI Pro costs $19.99. Our full Gemini review scores the assistant 4.0/5.

The catch: availability. Gemini in Chrome works in the countries Google lists (the US, Canada, the UK, Mexico and many more; EU countries are missing), never in Incognito mode, and auto browse is off for users under 18. Privacy-minded readers should also know that it runs on your Google account and its activity history, which you can review and delete.

Tip: share only the tabs you need with Gemini rather than everything open. Answers get sharper and you send less data.

Brave blocks ads and trackers by default. Its assistant, Leo, summarizes a page, answers questions about a video or PDF, and writes. It is free and needs no account. Brave says Leo doesn't retain or share chats, or use them for training. Leo runs on macOS, Windows, Linux, Android and iOS.

Model choice is a plus: Anthropic's Claude, Meta's Llama and Mixtral, with more models on Premium. Leo also accepts your own models, running locally or on a server you control. Leo Premium costs $14.99 a month or $149.99 a year. Paying yearly saves $29.89 versus twelve months ($179.88). There's a 7-day free trial.

The catch is the agent. Leo's AI browsing mode, which browses for you, is still in early testing: you switch it on by hand in brave://flags, and it runs in an isolated profile. It's also the Brave team that published the security flaws in agentic browsers, so the cautious approach is deliberate.

Tip: highlight a passage and open Leo from the right-click menu. You get a focused answer without sending the whole page.

Opera Neon is the agentic browser from Opera, the European browser maker. It bundles several agents: one shapes a quick agenda, one browses for you, one runs deep research or generates documents. Its edge: you can connect your own agents through MCP (a protocol that lets AI tools use outside apps) or a CLI.

Neon keeps Opera's basics: ad blocker, free VPN, tab management. The browser is a free download for Windows and macOS, with basic AI chat and the MCP and CLI connectors. Neon's own agents, deep research and model choice need the Standard plan: $19.90 a month, taxes included, month to month, or $238.80 over a year.

The catch is price. For everyday assisted browsing, free Comet covers the essentials. Neon makes sense if you build automations and want a browser your agents can drive. For casual use, Opera One and its Aria assistant are enough.

Tip: connect an agent you already use, such as Claude Code, through the CLI first. It's free, so you'll know whether Neon fits before you pay.

Fellou pitches itself as a browser that gets things done. Describe a task (compare five competitors' pricing, compile a market report) and it opens pages, collects data and returns a document. It works in a background workspace so your own browsing isn't blocked.

Pricing runs on Sparks, an internal currency. The free account comes with 1,000 Sparks at sign-up, about 4 tasks, and chat and Deep Search stay free. Plus costs $19 a month for 2,000 Sparks, which Fellou estimates at about 8 tasks: roughly $2.40 per task. Yearly, Plus is $192 ($16 a month). Pro is $39.9 a month for about 20 tasks.

The catch: 8 tasks a month isn't much, and the cost of a task depends on how complex it is. Weekly research fits; daily use gets expensive.

Tip: write your prompt like a brief (sources to read, output format, length). A vague task burns Sparks for nothing.