Comet Browser: features, advantages, and disadvantages in 2026

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What is Comet Browser

Comet Browser is a browser with a built-in AI assistant developed by Perplexity. Unlike regular browsers, Comet can independently click buttons, open the necessary tabs, fill out lengthy registration forms, unsubscribe from spam mailing lists, and organize information in the background. However, some actions require confirmation. 

The browser works with Google Workspace, Microsoft 365, Slack, Jira, and Notion, and it also remembers information about the user.

How Comet works

Visually, Comet resembles familiar browsers: it has an address bar and tabs. You can access web pages, search for information, follow links, and read websites as usual. The main difference is artificial intelligence, which helps you work with page content and perform tasks directly in the browser.

On a computer, the assistant opens in the browser’s sidebar. The current page remains in place, allowing you to read an article in the main window while asking the AI questions at the same time. To use it, simply enter a prompt: for example, ask it to explain a complex term, find a specific fact, or briefly summarize a text.

An important feature of Comet is that the assistant can take the context of your browser activity into account. For example, if you have opened an article and want a summary, you do not need to copy the text into a separate chat or send a link. Simply ask Comet to summarize the page. If you are working with several tabs, the assistant can also compare data or find the information you need.

Main features of Comet Browser

Here are its main capabilities:

• Intelligent search. The user asks a question and receives a ready-made, structured answer with a list of primary sources. This feature is similar to AI Overviews in Google Chrome.

• In-depth tab analysis. The browser highlights the key points, summarizes long-form articles, explains complex terms, or identifies hidden patterns in numerical data.

• Data comparison and synthesis. Comet can scan several open tabs in parallel. For example, you can open five competitor websites, and the AI will automatically compare their prices and delivery terms, highlight the differences, and create a ready-made comparison table.

• Autonomous task execution. At the user’s command, Comet can fill out a lengthy registration form, submit a job application, place an order, or perform a sequence of clicks on a website.

• Integration with work services. The browser connects to Gmail, Google Calendar, Slack, or Notion. For example, it can check incoming emails, review your schedule, and draft a response to a client on its own.

• Language assistant. Comet translates texts, adapts complex legal or technical wording for general users, and explains the context of specific foreign-language idioms.

• Long-term memory. You can return to your research several days later without having to provide the background information again—the browser will continue from where you left off.

The available features may vary depending on the device, app version, subscription plan, and settings. The AI can also make mistakes, so important facts and the results of automated actions should be checked independently.

Advantages of Comet Browser

Compared with other AI browsers, Comet stands out for:

• Smart search. It immediately provides clear, ready-made answers with facts instead of simply searching for text on web pages.

• Good memory. The browser remembers the essence of your previous tasks, even if you closed a tab and returned to your work several days later.

• Accessibility. It is available for free, while other AI startups require expensive subscriptions for individual features.

Disadvantages of Comet Browser

• Limited customization. Unlike the Dia browser, Comet does not let you create your own persistent AI commands and buttons for recurring tasks.

• No team collaboration tools. It falls behind SigmaOS because it cannot divide the screen into shared workspaces for collaborating with colleagues.

• Security risks. Because the AI has such deep access to web pages, hidden text on an external website can mislead the agent and cause it to disclose personal data.

It is important to note that problems such as occasional AI errors, unreliable automation, and slow performance on complex tasks are common to all AI browsers today.

Privacy and security in Comet: what data does it use?

Comet Browser by Perplexity interacts extensively with web pages. To execute AI commands automatically, it needs access to your current session. The browser uses the following data:

• Web page structure and code. To perform automated actions, the Comet AI model scans the structural HTML code, accessibility tree, and scripts of all open tabs in real time to understand where buttons, links, and input fields are located on a page.

• User input data. According to Perplexity’s security documentation, all your passwords, browsing history, and cookies are encrypted and stored strictly locally on your computer. However, files you entrust to the AI for automation, such as document templates, emails, and technical specifications, are sent to remote servers for processing.

• Digital fingerprint. Since Comet is built on the standard open-source Chromium and Blink engines, it works like a conventional browser. By default, when you visit websites, it transmits your real IP address, time zone, system language, as well as your graphics card characteristics, fonts, and audio context.

This is standard practice for regular web browsing. However, if you use Comet for professional tasks such as affiliate marketing, scraping, or managing dozens of accounts, the lack of digital fingerprint spoofing becomes a weak point.

Comet presents the same unchanging digital fingerprint to target websites. If an anti-fraud system detects suspicious AI activity or an attempt to access different accounts from the same device, it may link those accounts together and ban them.

How Octo Browser solves this problem

To protect your accounts if you work with several at the same time, you can use Octo Browser. Unlike Comet, its purpose is to make different accounts on the same platform appear to belong to unrelated users.

When you create a new profile in an anti-detect browser, it changes the digital fingerprint that website security systems see. The fingerprint includes the technical characteristics of the device and the browser, as well as cookies and cache.

You can also use proxies. They work with Octo and completely hide your IP address. Each profile gets its own clean IP address, corresponding time zone, WebRTC settings, and geographic coordinates. Please note that proxies must be purchased and connected separately.

As a result, website security systems see each anti-detect browser profile as a separate device operated by a unique person from their own location.

How to use Comet Browser safely: protection guidelines

To minimize your risks, we recommend following several security guidelines when working with Comet:

• Use the browser only as an assistant. Launch it when you need to solve a specific information analysis or automation task.

• Do not connect your primary accounts. Do not link your personal or important corporate Gmail account, Notion workspaces, or Slack accounts to Comet. It is better to create separate accounts for testing and work.

• Isolate financial operations. Never enter bank card details or cryptocurrency wallet passwords through Comet, and do not access online banking websites.

• Do not use autofill for confidential data. Do not trust the AI to store and automatically enter your actual documents, addresses, and passwords.

• Monitor AI actions on unfamiliar websites. Before the AI submits a form or starts a download, always double-check exactly what it is about to do.

• Separate tasks when managing multiple accounts. Use Comet in a separate window as a content generation tool. Copy texts manually and paste them into isolated profiles in an anti-detect browser.

Comet Browser and Google Chrome: key differences

Comet and Google Chrome are full-featured browsers for everyday Internet use, but they employ artificial intelligence differently. Comet was designed from the outset around an AI assistant and agentic features, whereas Google is gradually adding Gemini capabilities to its existing Chrome browser.

Comet Browser and other AI browsers

In the independent agentic browser segment, Comet currently competes in a narrow market. As of today, there are only two alternatives: Dia and SigmaOS. Its main competitor, ChatGPT Atlas, ceased operating in August 2026.

• Dia can analyze information from all open tabs and videos, turning them into a unified knowledge base. It produces accurate summaries of complex texts and has a reusable skills system. This feature allows users to record a sequence of actions for the AI once and then run it with a single click.

• SigmaOS can organize workflows for teams and professionals: automatically grouping tabs by projects and tasks, collecting data from web pages in a semi-automated mode (the user confirms the final action), and managing work trackers directly within the browser.

No AI browser guarantees completely error-free automation. Before connecting your email, work accounts, and other personal services, review the permissions, check your privacy settings, and do not entrust important actions to the assistant without your own supervision.

How to download and install Comet Browser

1. Open the official Comet Browser website.

2. Download the browser for your operating system. Comet is available on macOS, Windows, iOS, and Android.

3. Run the installation file and follow the on-screen instructions.

4. Review the privacy settings and check which permissions the browser requests, especially if you plan to connect your email or other personal services.

5. Sign into your account to access the advanced AI assistant features.

Some features may be unavailable depending on your device, browser version, and selected subscription plan.

Who can benefit from Comet Browser

The browser’s capabilities fall into two key categories: quickly processing large volumes of data and automating routine mechanical processes. This means Comet is particularly useful for:

• People who work with large amounts of information. This includes marketers and SEO specialists, researchers and business analysts, and sales managers.

• People who automate routine tasks. This includes HR managers and recruiters, entrepreneurs, and startup founders.

Comet Browser: user reviews

Comet Browser has high ratings: 4.8/5 on the App Store and 4.7/5 on Google Play. However, reviews of the browser are mixed. Users appreciate the usefulness of the built-in AI but also point out technical problems and limitations. 

For example, one user deleted the browser after ten months of use and returned to Chrome because, according to the user, Comet was too slow when working with large spreadsheets and multiple tabs. Another user complained about the limitations of the free tier: after several hours of use, they reached the AI action limit, which, according to the review, would not reset for another week. Another user noted that Comet does not offer enough advantages over familiar browsers.

Test drive: Comet Browser in real-world conditions

We tested Comet in three scenarios:

1. Compare iPhone prices and specifications across tabs using @tab. The AI performed well, but it completely failed to detect the price on one of the websites. The entire task took less than 10 seconds.

2. Conduct a marketing analysis of Amazon laptop reviews. The browser read only some of the comments on the product page but made up for this by searching other sources. Based on negative comments, Comet also prepared a brief for a copywriter covering three advertising texts that highlight how “our” laptop does not have these problems.

3. Automatically fill out a form. Comet analyzed the fields very well and pointed out errors in our prompt, but it could not physically enter the text or click the buttons. There were two reasons: security and Perplexity’s subscription plans. To allow the agent to control the screen, users need to enable Computer mode, grant system permissions in Windows or macOS, and have paid automation credits through a Pro or Max subscription.

Thus, without a paid subscription, Comet becomes a regular browser with the convenient Perplexity chatbot in the sidebar. It can analyze visible text and search for facts, but its main unique feature—the autonomous action engine—remains completely locked.

Conclusion

Comet Browser is designed for people who work extensively with information and want to automate routine tasks. Its main difference from a regular browser is that the AI can analyze the content of open pages, compare data from different sources, and, in some cases, perform actions online independently.

At the same time, Comet should not be treated as a fully autonomous assistant that can be trusted with any task without verification. AI errors, unreliable automation, privacy concerns, and limitations affecting certain features remain significant drawbacks.

To work safely with multiple accounts, it is better to use Octo Browser, an anti-detect browser that spoofs the digital fingerprint and helps prevent accounts on the same website from being linked to one another.

FAQ

Is Comet Browser free?

Yes, Comet Browser can be downloaded for free. The free version is well suited for getting acquainted with the browser and handling simple everyday tasks. However, there are limits: advanced intelligent search works a few times a day, after which the AI switches to short and simple answers. 

The free version also provides access only to the basic neural network model, limits document uploads for analysis to a few files per day, and quickly blocks automatic clicking and web form filling due to weekly usage limits.

Who created Comet Browser?

Comet Browser was developed by Perplexity AI. The company created the browser as a tool that combines website browsing, information search, and an AI assistant in a single application.

How is Comet different from Chrome?

The main difference is the approach to using artificial intelligence. Comet is designed from the outset for AI-powered search, web page analysis, and assistance with performing tasks directly in the browser. Google Chrome is a universal browser, and its AI capabilities are being developed through Gemini.

Is Comet Browser available on mobile devices?

Yes, Comet Browser is available for mobile devices running Android and iOS. The mobile version allows users to access the built-in AI assistant, ask questions about open pages, and receive brief summaries of information. On Android, voice interaction with the assistant and built-in ad blocking are also available. The browser can be downloaded from Google Play or the App Store.