Comet

Comet is a Mac desktop web browser built by Perplexity AI that fuses a full Chromium-based browsing engine with a deeply embedded AI assistant — so research, summarisation, and conversational follow-up happen inside the same window you're already reading in.

What is Comet?

Comet is Perplexity AI's own Mac browser, designed from the ground up around the premise that switching between your browser and an AI chat window is a workflow tax you shouldn't have to pay. Rather than bolting an extension onto Chrome or Safari, Perplexity built the surface from scratch so the AI layer is a first-class citizen at every level of the browsing experience — from the address bar to the active page you're reading.

Think of it as the logical next step from Perplexity's search product: where the web search answered your question with sources, Comet lets you interrogate those sources, browse further, and have a running conversation about what you find, all without leaving the tab.

What does Comet do best?

Comet shines brightest during research-heavy sessions where you'd normally bounce between a browser, a Perplexity tab, and a notes app. The integrated AI can summarise the page you're on, extract key claims, compare information across multiple open tabs, and answer follow-up questions with citations drawn from your actual browsing session — not just its training data.

• Page-aware AI: ask about the article you're reading and get answers grounded in its content, not generic web results.
• Conversational tab management: multi-step research threads persist alongside the pages that sparked them.
• Perplexity search built in: the address bar routes naturally into Perplexity's cited-answer engine when you want web-wide answers rather than page-specific ones.
• Native Mac feel: Comet targets macOS specifically, so it respects system fonts, Dark Mode, and trackpad gestures rather than fighting them.

Where it is less compelling is as a pure replacement for browsers you've used for years. Extension libraries, password-manager integrations, and the decades of muscle memory baked into Safari or Chrome take time to rebuild — and Comet is early enough that those surfaces are still catching up.

How much does Comet cost?

Comet is free to download. The AI features are powered by Perplexity's platform, so the depth of capability available to you tracks your Perplexity subscription tier — free accounts get meaningful functionality, while a Perplexity Pro subscription unlocks the more powerful models and higher usage limits. There is no separate Comet-specific paywall on top of that.

Who should use Comet?

Comet is best suited to knowledge workers, researchers, analysts, and writers who spend long stretches inside a browser extracting meaning from text. If you routinely open a tab, copy a block of content, paste it into ChatGPT or Perplexity, ask a question, then copy the answer back — Comet collapses that loop into a single surface. It is also a natural choice for anyone already paying for Perplexity Pro, since the browser becomes an extension of a tool they're already invested in.

It is less obviously the right call for power users who depend on a rich Chrome extension ecosystem, or for anyone doing GPU-intensive work where a second Chromium instance carries a real memory cost. On an M-series Mac with plenty of RAM, that concern mostly evaporates — but on an older machine, keep it in mind.

How does Comet compare to Arc and Safari?

Arc from The Browser Company also targets Mac power users with a rethought UI, but its AI layer (Arc Search on mobile, experimental features on desktop) feels more incidental than Comet's, where AI is the founding premise rather than a feature added later. Safari is fast, battery-efficient, and the default choice for iCloud Keychain users — but its AI integration via Apple Intelligence is narrower and, as of mid-2026, less capable for research tasks than Perplexity's models.

Comet does not try to win on raw performance or extension breadth. Its proposition is singular: the best AI-augmented research experience inside a browser on a Mac. If that specific promise maps to how you actually work, nothing else in the market delivers it as cohesively right now.

What are the best Comet alternatives?

If Comet does not fit your workflow, the most direct alternatives are Arc (innovative Mac-native UI, growing AI features), Brave with the Leo AI assistant (privacy-first, Chromium-based, built-in AI without a subscription), and Safari paired with a standalone Perplexity.ai tab. For pure AI-in-browser extension coverage, Sider and Merlin sit as Chrome/Edge extensions that bring a chat sidebar to any Chromium browser — useful if switching browsers entirely is a non-starter.