Comet

0:16 Comet is the AI web browser from Perplexity: a desktop and mobile browser with Perplexity as its search engine and an assistant that can read, summarize and act on the pages you open. It has been free to download since Oct 2, 2025 and, as of Nov 6, 2026, runs on Mac, Windows, iOS and Android. The browser and its answers are free; the Comet Assistant's agent tasks need a paid Perplexity plan, per Perplexity's plan guide.

Comet suits people who already search with Perplexity and want an assistant that can do errands across tabs. Be careful letting any AI browser act while you are signed in to email or a bank: security researchers have shown Comet can be steered by text hidden in web pages. If you live in Google's apps, Gemini in Chrome adds similar help to the browser you already use; Best AI Browser compares the field.

Quick facts

Is Comet free?

Yes. Perplexity made Comet free worldwide on Oct 2, 2025, after a summer when it was limited to Perplexity Max subscribers and people invited from a waitlist. What costs money is the agent: Perplexity's plan guide, read Nov 6, 2026, lists browser agent (Comet Assistant) queries as not included on Free, with monthly limits on Pro, Education Pro and Max, 80 a month on Enterprise Pro and 800 on Enterprise Max.

Comet Plus is a separate news subscription announced in Aug 2025: $5 a month on its own and included in Pro and Max, with Perplexity saying 80% of the money goes to the participating publishers.

Features

2:56 Comet Assistant. A sidebar that sees the page you are on and your open tabs, to answer questions, compare sources or draft a reply. It can be paused at any time.

1:06 Agent tasks. Ask it to fill a cart, unsubscribe from newsletters, manage your inbox or plan a trip, and it clicks and types in the browser for you. Perplexity's Oct 2025 launch post also introduced background assistants that run several tasks at once while you do something else, and an email assistant for Max subscribers.

Perplexity search. The address bar answers with Perplexity's cited summaries rather than a list of links.

Security: prompt injection

In Aug 2025 Brave's researchers showed that instructions hidden in a Reddit comment could make Comet's "summarize this page" feature act on a user's logged-in accounts. Perplexity issued a fix, but Brave updated its post to say the attack was not fully mitigated, and a follow-up on Oct 21, 2025 found injections hidden in screenshots and faint text. This is a problem for the whole category: OpenAI said in Dec 2025 that prompt injection is unlikely ever to be fully solved. Keep agent tasks narrow and watch what the assistant does on sites where you are signed in.

Amazon's lawsuit

Amazon sued Perplexity on Nov 4, 2025, saying Comet shopped on users' Amazon accounts without disclosing that it was an AI agent; Perplexity called the suit bullying. A federal judge granted Amazon a preliminary injunction on Mar 10, 2026, finding strong evidence Comet accessed the site "without authorization," and the Ninth Circuit put that order on hold on Mar 17, 2026 while it heard Perplexity's appeal.

History

• Feb 24, 2025: Perplexity teased a browser called Comet (TechCrunch).
• Jul 9, 2025: launched on Windows and Mac for Max subscribers and invitees.
• Aug 2025: Comet Plus announced; Brave published its prompt injection research.
• Oct 2, 2025: free for everyone worldwide.
• Nov 4, 2025: Amazon sued over Comet's shopping agent.
• Mar 2026: Amazon won an injunction, which the appeals court paused a week later.
• Nov 6, 2026: Comet offered on Mac, Windows, iOS and Android.

Comet vs the alternatives

• Gemini in Chrome: Gemini inside Chrome, with Gmail, Calendar and Maps connections; auto browse is for Google AI Pro and Ultra subscribers.
• ChatGPT Atlas: OpenAI's browser was shut down on Aug 9, 2026; the ChatGPT desktop app's built-in browser and Chrome extension replaced it.
• Manus: an agent that does the browsing on its own cloud computer, so it does not use your logged-in browser.
• Perplexity itself: the same answers in any browser without switching.

Frequently asked questions

Is Comet free? Yes. Perplexity's Comet browser has been free to download and use since Oct 2, 2025; as of Nov 6, 2026 its agent (Comet Assistant tasks) needs a paid Perplexity plan.

Is Comet available on iPhone and Android? Yes. As of Nov 6, 2026 Perplexity offers Comet for Mac, Windows, iOS and Android.

Is the Comet browser safe? Comet works as an ordinary browser, but its AI agent has been shown to follow instructions hidden in web pages (Brave, Aug and Oct 2025). Give it narrow tasks and supervise it on sites where you are signed in.

What is Comet Plus? A $5-a-month news subscription Perplexity announced in Aug 2025, included in Pro and Max, that shares 80% of its revenue with participating publishers.

Comet or ChatGPT Atlas? ChatGPT Atlas was shut down on Aug 9, 2026, so Comet is the one you can still download.

Sources

• Comet, Perplexity, read Nov 6, 2026
• Comet is now available to everyone worldwide, Perplexity, Oct 2, 2025
• Which Perplexity subscription plan is right for you?, Perplexity Help Center, read Nov 6, 2026
• Perplexity says it will give publishers 80% cut of new subscription product's revenue, Axios, Aug 26, 2025
• Agentic Browser Security: Indirect Prompt Injection in Perplexity Comet, Brave, Aug 20, 2025
• Unseeable prompt injections in screenshots, Brave, Oct 21, 2025
• Perplexity AI accuses Amazon of bullying with legal threat over Comet browser, CNBC, Nov 4, 2025
• Amazon wins court order to block Perplexity's AI shopping agent, CNBC, Mar 10, 2026
• Perplexity AI Shopping Bots Can Stay on Amazon for Now, Court Rules, Bloomberg, Mar 17, 2026
• Perplexity teases a web browser called Comet, TechCrunch, Feb 24, 2025
• OpenAI says AI browsers may always be vulnerable to prompt injection attacks, TechCrunch, Dec 22, 2025
• Introducing Comet: Browse at the Speed of Thought, Perplexity, Jul 9, 2025 (video)
• Perplexity Comet Changed How I Use My Mac, Stephen Robles, Aug 1, 2025 (video)