Interesting news out of Perplexity: their AI browser Comet has been free for everyone worldwide since October 2025. Only a few months ago the tool was reserved for subscribers of the premium Max plan at 200 USD a month. Now anyone can try it at no cost whatsoever.
What Comet can actually do
Comet is not an ordinary web browser. It is built on Chromium, but it adds one fundamental innovation: it works as an agentic AI assistant baked straight into the browsing environment. That means Comet can not only display web pages but actively carry out actions on them following your instructions.
Specifically, it can click buttons on its own, scroll, fill in forms, organise open tabs, help with e-mail, shop, or summarise the content of a page. It reads text directly on the web, responds to context and performs the repetitive chores you would otherwise have to do by hand. The longer you use it, the better it understands your preferences and the way you work.
A practical demo: inviting Facebook fans automatically
To show you how Comet behaves in practice, I recorded a video with one concrete use case. In it I demonstrate how Comet can automatically invite people who reacted to an ad or interacted with a website to follow a Facebook page.
You will find the video on my YouTube channel: https://www.youtube.com/watch?v=eWUvCPo28qc (the narration is in Czech, but the on-screen workflow speaks for itself).
In the demo I open the Facebook comments and ads admin at business.facebook.com. There you can see, for example, 245 people who reacted to the ad in some way. The catch is that you normally have to invite them manually, one by one.
So I create my own prompt, a shortcut I called “FB-Clicker”. Shortcuts are triggered in Comet with a slash. The prompt reads: “On the open page you can see our company’s ad. In the list of users who reacted to it, the number next to the thumbs-up icon, you will see which users you can invite. If there are any, click the button and invite them to follow our page. To see more of them, you have to keep scrolling inside the dialog.”
The moment I send the shortcut, Comet switches into agentic mode, which you can tell from the blue frame around the web page. And then something fascinating starts happening. The browser begins clicking by itself, even though the mouse is somewhere else entirely. It invites one person after another. On the right you can watch how Comet reasons, and you can even swap the models that are driving it at any given moment.
Once it has invited everyone visible, it scrolls further on its own and carries on inviting. This way it is able to invite essentially every fan who interacted with your ad, without you having to lift a finger.
Other ways to use Comet
The video shows just one specific example, but I use Comet for plenty of other jobs too. Bit by bit it is replacing tools like n8n, Make or Zapier for work that requires direct interaction with a web interface.
I use Comet to clean up comment spam in WordPress, for instance: it goes through the comments itself and removes spam according to criteria I define. It reads my e-mail for me and flags the messages that need my reply. Less important mail it archives automatically or sorts into folders.
On Placla.eu (a Czech marketplace for paid articles, which are great when I need to spread awareness of a site across the internet) it goes through the offers and accepts the ones that fit the site’s topic. When browsing LinkedIn or Twitter it can find posts matching the criteria I care about and save the links for later reading. It is extremely handy for the monthly approval of affiliate commissions in the e-shop: thanks to Comet, affiliate partners no longer wait “until Kubíček gets around to it”.
Comet can carry information between different tabs and formats. You can open a competitor’s e-shop in one tab and a Google Sheet in the other and give it a prompt: “Grab the product names, codes and prices and put them into the columns in my spreadsheet.” I also use it to click through and test applications from the user’s point of view.
Tips for working with Comet effectively
Sometimes it helps if Comet uses Python for part of a task. If you suspect that would work better, nudge it in that direction. For recurring jobs, create shortcuts: then you just hit the slash and pick from the list instead of typing the prompt over and over.
On very long pages Comet may not capture all the data on the first attempt. Occasionally you need to refine the task or tell it to continue, and check the completeness of the result yourself.
Break complex tasks into smaller steps and hand them over gradually. That is true of most agentic AI and Comet is no exception. If you want the data in a particular format, say so explicitly: “Give me the output in YAML, JSON, CSV…”
What to keep in mind
Automation is a wonderful thing, but it calls for a responsible approach. The prompt has to be written carefully and unambiguously so that Comet does exactly what you want. On top of that you need to respect the rules of platforms such as Facebook. You really do not want to risk being flagged as spam or breaching the terms of use.
Perplexity is also promising further improvements: a mobile version of Comet is on the way, along with a Background Assistant feature that will be able to work asynchronously on several tasks at once.
The fact that Comet is now available free removes the financial barrier and opens the door to a wide range of users, from marketers just starting out to smaller companies that used to hesitate because of the price. My video with the hands-on demo of automatic fan invitations on Facebook serves as a concrete example of what this tool can do and how it can save you time on repetitive tasks.
If you want more tips, guides and workflows for working with AI tools and optimising your web projects, visit kubicek.ai or optimalizace.ai, where you will find further materials and training.
