Comet is Perplexity’s attempt to move the answer engine into the one app you never close: the browser. It is a Chromium-based browser with Perplexity’s assistant built into its frame, able to see the page you are on, the tabs you have open and, increasingly, to act on your behalf.
The pitch is that browsing itself is overdue for reinvention. Tabs pile up, comparisons sprawl, and the reading gets done by you. Comet proposes that the browser should do the reading, the comparing and eventually the clicking, while you supervise.
What the assistant actually does
The Comet assistant lives in a sidebar and works from context. Ask it about the page in front of you and it answers from that page; ask it to compare the products across your open tabs and it reads all of them; ask a general question and it falls back to Perplexity’s cited web search.
On top of answers sit actions. Comet can work through multi-step tasks in the browser, following links, filling in information and assembling results, with the paid tiers adding deeper agentic features such as background assistants that keep working on tasks you set them.
Because it is built on Chromium, the migration pitch is gentle: your extensions, bookmarks and habits carry over. Perplexity is not asking you to learn a new browser so much as to notice the old one getting smarter.
How big is it, honestly?
Perplexity does not publish official Comet user numbers, so treat outside figures with care. Third-party trackers estimate Comet at roughly 18 million monthly users, which would make it the largest of the AI-native browsers by a wide margin, but it is an estimate, not an audited figure.
Even hedged, the direction is clear. Comet moved from a paid, waitlisted launch to a free product, and the browser has become central to Perplexity’s strategy: it is where the answer engine stops being a website you visit and becomes the window everything passes through.
Why the browser is the real battleground
Whoever owns the browser owns the default. Google understood this with Chrome and Search; Perplexity is applying the same logic to the AI era, where the valuable position is the agent that sees your context and acts inside it.
The competition frames the stakes. Google is weaving agents into Search and Gemini, including shopping flows such as Universal Cart, while rival AI browsers chase the same assistant-in-the-frame idea. If agents are how people will use the web, the browser is where that habit will be won or lost.
What Comet means for Chrome’s moat
Chrome’s dominance was never really about the browser; it was about defaults, distribution and the search business underneath. An AI browser attacks a different layer: not where the web opens, but who does the work once it is open. If the assistant is the product, the window around it becomes replaceable.
That is why incumbents are not standing still. Google is folding Gemini and agent features into Chrome itself, and every AI capability that lands in the default browser raises the switching cost Comet has to overcome. Comet’s counter is depth: a browser designed around the assistant from the first tab, rather than one with an assistant attached afterwards.
Privacy is the argument Comet has to win in public. An agent browser works best with broad access to your pages, accounts and context, and every user will set that boundary differently. Perplexity’s bet is that convenience, carefully permissioned, beats caution for an audience large enough to matter.
For Perplexity itself, the browser is also a distribution strategy. Every query that starts in Comet starts with Perplexity, not with a search engine that might answer without it. Owning the front door protects the answer engine behind it.
Whatever its final share, Comet has already done one job: it proved a browser can be an AI product in its own right, not just a frame for websites. The clones, integrations and defensive launches now arriving across the industry are the receipt for that.
Comet’s risk is the mirror of its promise: an assistant that can see everything and act for you demands enormous trust, and every agentic mistake happens in public. For now, it remains the clearest working picture of what post-search browsing is supposed to feel like.
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