Glossaire · GEO

Comet

Comet is the agentic browser developed by Perplexity: instead of displaying pages that a human reads and clicks, it combines search, browsing, synthesis and action within a single interface driven by an AI agent. You give it a goal — "find the best offer and book it" — and it queries the web, opens the relevant sites, extracts the information, compares, then executes the task on the user's behalf. Comet extends Perplexity's answer engine by adding the ability to act: the AI no longer merely cites sources, it browses them and puts them to work to complete a concrete action. For brands, Comet shifts the stakes: it is no longer only about winning over a human, but about being readable, cited and chosen by the agent driving the browser. An opaque or poorly structured site becomes invisible to Comet, to the benefit of better-prepared competitors.

Comet is Perplexity's agentic browser: a browser in which an AI agent is at the wheel. Where a classic browser merely displays pages that a human reads and clicks, Comet receives a goal and chains together search, browsing, synthesis and action on its own.

How Comet works

Comet starts from Perplexity's answer engine and adds the ability to act. The user states an intent — "compare three invoicing tools and subscribe me to the best one" — and the agent takes over. It queries the web, opens the identified sites, reads the content, extracts prices and terms, structures a comparison, then can go as far as filling out a form or validating a transaction.

This combination sets Comet apart from a simple conversational assistant: it does not just return an answer, it executes a sequence of steps to reach the goal. Technically, the agent perceives the request, plans a chain of actions, acts by operating the browser, observes the result obtained, then corrects its trajectory until completion. Comet thus fully embodies the category of the agentic browser, where the AI becomes the effective user of the web.

Search, synthesis and action combined

Comet's value lies in this fusion of functions that were once separate. Search identifies the sources, browsing opens them, synthesis extracts the essentials, and action triggers the decision. It is the agent that arbitrates at each step: which sources to consult, which to retain, which action to trigger. The user no longer drives the intermediate steps — they set the course and Comet does the rest.

This shift is profound. In the classic web, every site gets several chances to convince: a homepage, a pitch, a visual, a call to action. Facing Comet, a brand often has only one shot: to be understood and retained by the agent as it passes through. If the sought-after information is not immediately readable, the agent moves on to a more cooperative source, never to return.

A concrete example

A user asks Comet: "Find three SEO agencies in Albi, compare their offers and keep the most complete one." The agent formulates queries, browses the identified sites, extracts pricing information and services, structures a comparison, then delivers a reasoned recommendation. An agency whose page remains vague about its offer, or whose prices are buried in an unreadable PDF, will simply be dropped from the comparison in favor of a more explicit competitor.

Why it matters for your visibility

With Comet, your first point of contact is no longer the human behind the screen, but the agent driving the browser. It is the one that reads your pages, judges their relevance and decides whether to include your brand in its answer. A site relying on opaque JavaScript, unstructured data or a confusing journey simply becomes invisible to Comet.

To stay chosen by this agent, you need factual, self-sufficient content, structured data and clear named entities. This is precisely the purpose of GEO: ensuring that agents like Comet understand, retain and cite your company rather than a better-prepared competitor.

FAQ

Frequently asked questions

Comet is Perplexity's agentic browser. It brings together search, browsing, synthesis and action: beyond answering a question, it opens sites, compares offers and can execute a task on the user's behalf, such as booking a service or filling out a form. It thus extends Perplexity's answer engine by adding the ability to act.

Comet is offered by Perplexity in progressive access, tied to the Perplexity ecosystem. Access terms evolve as the rollout continues, with some of the most advanced features linked to a Perplexity Pro subscription. To know the exact offer at any given moment, refer to Perplexity's official announcement.

Yes. Comet relies on the Perplexity ecosystem, and some of its most advanced features are tied to the Perplexity Pro subscription. The agent draws on Perplexity's answer engine and models to search, compare and act. The precise terms evolve depending on the ongoing rollout.

Comet is downloaded from Perplexity's official website, which manages its rollout. Access opens gradually across platforms and regions. To install it, always go through Perplexity's official channels to avoid fraudulent copies, and check compatibility with your operating system before installation.

Comet's autonomy raises real concerns: access to connected accounts, entry of personal data, execution of transactions. Perplexity frames these actions with confirmations and limited scopes. Check the permissions granted and avoid letting the agent act on sensitive spaces without explicit validation on your part.

Comet, by Perplexity, leans on the strength of its answer engine for comparative research. ChatGPT Atlas, by OpenAI, natively embeds the ChatGPT agent and excels at multi-step tasks on the open web. Both fall under the agentic browser category; the brand visibility stakes are identical whichever one you face.

Comet is the browser developed by Perplexity: it does not exist independently of that company. It builds on Perplexity's answer engine and models, to which it adds the ability to act. Perplexity designs, deploys and evolves Comet, which extends its answer-engine mission toward autonomous action.

With Comet, it is the agent — not the human — that reads your pages, judges their relevance and decides whether to cite you. If your content is not structured and usable by that agent, Comet will recommend a better-optimized competitor, no matter how appealing you are to a human visitor. GEO is precisely about making your brand readable and citable by it.

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