Perplexity Comet Review: When the Browser Starts to Think

When Perplexity announced its own browser, Comet, it didn’t just add another Chromium clone to the market. It set out to reimagine how people interact with the web.

Comet combines Perplexity’s conversational search engine with an integrated agent that can read, act, and remember.

The company calls it an “AI-native browser,” and while that label has been loosely applied in 2025, Comet makes a strong case that it deserves the title.

A Browser Born From a Search Engine

Perplexity has already built a reputation for delivering fast, source-cited answers through its AI platform.

But as users leaned on its assistant for more than quick queries, such as trip planning, research, or summarizing, it became clear that the web interface was the bottleneck.

Comet attempts to fix that by building the assistant directly into the browsing experience.

Unlike conventional browsers that merely host websites, Comet acts as an active participant. It can summarize a document, fill out a form, or extract structured data from a cluttered page.

When it works, it feels like using the internet with an intelligent co-pilot sitting beside you.

Interface and experience:

Open Comet, and it feels familiar yet subtly different. It uses Chromium as its base, so everything from tab management to settings looks instantly recognizable.

But the left-hand sidebar, where the Perplexity assistant lives, changes the rhythm of how you browse.

The assistant isn’t just a static chatbot window. It watches what’s open, keeps track of your tab context, and can join your workflow midstream. Reading a dense research paper? Ask it to summarize. Comparing three hotel options?

Ask it to extract and rank amenities by price. Each prompt feels integrated, not an interruption.

This approach echoes what OpenAI did with ChatGPT Atlas, but Comet’s execution feels leaner. The assistant appears instantly without lag, and the responses arrive in neatly structured cards, each citing its sources.

You can pin results or convert them into small “memory” snippets to reference later, a feature designed for long-term workflows.

Agent Mode:

The most ambitious piece of Comet is Agent Mode. It is a toggle that lets the browser act semi-autonomously. Instead of just generating text, Comet can take actions on the web.

For example, you can tell it to “find recent reviews of electric bikes, shortlist the top three under $2,000, and open them in tabs.” It will execute those steps one by one.

In our testing, the agent completed simple tasks with surprising accuracy. It opened relevant pages, extracted specs, and even formatted them in a readable table.

Complex instructions, however, sometimes derailed the agent. It would misinterpret the criteria or skip key details. Still, as a proof of concept, it demonstrates what agentic browsing could become.

Users can also invoke voice commands, which turn Comet into a hands-free assistant. The recognition system, powered by Whisper-like speech models, responds quickly and feels natural in conversation.

While this may sound gimmicky, it’s handy when multitasking or navigating large documents.

The Privacy Pitch

Perplexity is trying to position Comet as a privacy-conscious AI browser, and it has introduced three privacy modes: Standard, Strict, and Local.

• Standard shares contextual data with Perplexity’s servers to improve results.  
• Strict limits what the AI can see or remember within a browsing session.  
• Local runs tasks on the user’s machine without external data transmission.

On paper, this sounds like a clear win for users who don’t want their web activity siphoned to the cloud. But several researchers and privacy advocates have pointed out that it’s hard to confirm how these modes behave in practice.

Comet’s privacy disclosures note that “anonymized interaction data may still be used for quality assurance.” In simpler terms, it’s not entirely offline.

Nevertheless, the ability to choose a stricter mode sets Comet apart from Chrome and Edge, which often require manual settings tweaks to reduce tracking.

The Security Reality:

With great capability comes great vulnerability. Soon after Comet’s launch, cybersecurity researchers discovered a class of exploits dubbed CometJacking attacks that use malicious web prompts to hijack the AI agent’s instructions.

Attackers could theoretically manipulate embedded text or hidden commands to make Comet share snippets of user data or perform unintended actions.

Perplexity responded quickly, issuing patches and adding a visual confirmation layer before an agent executes sensitive tasks.

Yet the episode highlights an unavoidable tension in AI browsing: the smarter the agent, the more surfaces hackers can target.

Independent audits from Brave Software and Guardio Labs confirmed that Comet’s sandboxing has improved since launch. Still, the consensus is that agentic browsers must evolve faster than conventional ones to stay secure.

Performance and Everyday Usability

Despite these concerns, Comet’s performance is consistently praised. Pages load quickly, transitions feel smooth, and the AI’s summarization engine responds in under a second for most tasks.

In side-by-side tests with ChatGPT Atlas and Arc Browser, Comet often delivered answers faster, though Atlas provided more nuanced reasoning in longer conversations.

Comet’s UI maintains a careful balance between functionality and minimalism. Tabs scroll horizontally; the AI sidebar can collapse to save space.

A “Research View” layout splits the screen, showing the AI’s findings on one side and the source material on the other,  an invaluable feature for writers, students, and analysts.

Battery usage, on the other hand, could use improvement. Running agent mode and local processing simultaneously can drain laptops quickly than Chrome. Still, the difference isn’t drastic enough to derail daily use.

Voices from the Community

On Reddit and Hacker News, early adopters are actively debating Comet’s promise. Some hail it as “the first real research browser,” while others say it’s “still too unpredictable to trust with automation.”

One Redditor compared it favorably to ChatGPT Atlas, calling it “faster, lighter, and better at surfacing sources.”  

Power users appreciate its thread memory. The ability to recall what you’ve recently worked on and note that it helps keep long research sessions coherent.

But others report occasional glitches: disappearing tabs, frozen tasks, and agent loops that never finish.

The most consistent complaint isn’t about bugs but trust. Users remain cautious about granting a browser so much control. As one commenter put it, “Once your browser can read your email and fill out forms, it better not get confused.”

Comparing Comet to the Competition

AI browsers are no longer novelties. ChatGPT Atlas, Arc AI, and Microsoft Edge with Copilot all aim to merge intelligence with browsing. But Comet differentiates itself in a few ways:

• Core Integration: Comet’s assistant is built into the interface, not added as an afterthought.
• Performance: Its lightweight design delivers faster speeds than Atlas for most basic tasks.
• Privacy Control: Tiered privacy modes offer users greater flexibility over data sharing.
• Research-Oriented: The interface prioritizes information work over casual entertainment.

Compared to Atlas, Comet feels like a sprinter: fast, focused, but sometimes over-eager. Atlas remains stronger at long, context-heavy reasoning.

Arc AI is the aesthetic champion, appealing to designers and creators, while Edge and Chrome serve corporate and general users.

Pricing and Availability

Initially, Comet was locked behind Perplexity’s Pro plan, but public demand led the company to open a free tier with reduced memory and automation limits.

This strategic shift mirrors Perplexity’s broader goal: get users onboard quickly, then upsell enhanced features later.

The Pro and Max tiers now include extended context memory, more local storage for cached AI tasks, and early access to experimental features like “Cross-App Control,” which aims to let Comet interact with native apps.

If implemented correctly, that could blur the line between browser and operating system.

Are AI Browsers the Future?

Comet’s debut marks a turning point. The idea of a browser as a passive window into the web is fading. Users now expect a browser that can understand intent, act safely, and adapt over time.

Perplexity is betting that the assistant-driven model will become standard, and it might be right.

Yet the challenge lies in execution. Agentic browsers like Comet and Atlas need to maintain reliability, transparency, and security at a scale traditional browsers never faced.

Each misfire, each wrong click, or misunderstood command chips away at user trust.

Comet feels like a leap forward, but also a reminder that giving software more autonomy means rethinking every layer of digital safety.

Final Verdict:

After two weeks of testing, Perplexity’s Comet stands out as one of the most promising AI browsers of 2025. It’s quick, polished, and capable of genuine assistance and not just conversation.

The built-in agent makes research smoother, the privacy settings are a welcome nod to control, and the integration with Perplexity’s knowledge engine feels organic.

But the rough edges show. Occasional bugs, lingering privacy questions, and security exposure make it clear that Comet is still evolving.

It’s a browser that shines brightest in focused, task-based work, summarizing, comparing, gathering, but struggles when asked to think too freely.

For professionals, researchers, and early adopters, Comet is absolutely worth trying. For everyday users, the safer bet may still be Chrome or Edge at least until the next round of patches lands.

If the pace of innovation continues, though, Comet might soon fulfill its own tagline: a browser that thinks alongside you.