Perplexity Comet
Comet is an AI-native web browser built by Perplexity that integrates its answer-engine search, an AI sidebar assistant, and agentic browsing features directly into the browsing experience, letting users ask questions about pages they're…
Definition
Comet is an AI-native web browser built by Perplexity that integrates its answer-engine search, an AI sidebar assistant, and agentic browsing features directly into the browsing experience, letting users ask questions about pages they're viewing or have an AI agent complete multi-step tasks across websites.
Overview
Comet, released by Perplexity in 2025, is built on a Chromium base but positions AI as a first-class part of the browser rather than an add-on extension. Its core features include an always-available AI sidebar (Perplexity Assistant) that can summarize or answer questions about the current page, compare open tabs, or synthesize information across multiple browsing sessions, and Perplexity's search-and-answer engine integrated directly into the address bar in place of a traditional search engine. Comet's more distinctive feature is agentic browsing: the assistant can be asked to complete multi-step tasks that involve navigating and interacting with websites on the user's behalf — for example, comparing prices across shopping sites, filling out and submitting forms, managing email or calendar tasks, or booking a reservation — acting somewhat like a browser-based version of computer-use agents, operating within the actual rendered web pages rather than through separate APIs. This raises both capability and safety/trust considerations distinct from a standard chat assistant, since the agent is taking real actions (clicks, form submissions, purchases) inside live websites. Comet is part of a broader trend of AI companies building or acquiring browsers as a platform for agentic AI (alongside efforts like OpenAI's ChatGPT Atlas and other browser-embedded agent products), reflecting a bet that the browser — where most knowledge work and online tasks already happen — is a more natural home for persistent, context-aware AI assistance than a separate chat window, and a strategic extension of Perplexity's core search-and-answer product into a full browsing surface it controls end to end.
Key Features
- Chromium-based browser with an integrated AI sidebar assistant
- Perplexity's answer-engine search built into the address bar
- Agentic browsing: multi-step task completion across live websites
- Page and multi-tab summarization and Q&A
- Can fill forms, compare information across sites, and complete purchases/bookings
- Persistent assistant context across browsing sessions
- Built by Perplexity as an extension of its core search product
Use Cases
Alternatives
Frequently Asked Questions
From the Blog
What Is Perplexity AI? The Answer Engine Explained
Perplexity AI is a search-and-answer tool that combines live web retrieval with a large language model to produce cited, sourced answers instead of a list of links. Here's how it works, how it differs from a chatbot, and when to use it.
Read More AI & TechnologyPerplexity Explained: What It Measures and What It Misses
Perplexity is the exponentiated average negative log-likelihood a model assigns to held-out text — a measure of how surprised it is by real data. This article defines it precisely, shows how to compute it, and explains why it tracks task usefulness poorly for instruction-tuned models.
Read More