Comet: Perplexity's AI agent browser, plans and risks
Comet is Perplexity's web browser, built on Chromium. It folds in Perplexity search and an agent, Comet Assistant, that can browse, click and fill in forms on your behalf.
Data as of October 22, 2026
Key figures
| Developer | Perplexity |
|---|---|
| Country | United States |
| Launched | July 2025 |
| Free version | Yes, limited |
| Plans | from $17 per month |
| Official website | perplexity.ai |
Features
| Features | |
|---|---|
| Web search | Yes |
| Agent mode | Yes |
| File upload | Not disclosed |
| Image generation | Not disclosed |
| Voice mode | Not disclosed |
| Memory | Not disclosed |
| Code execution | Not disclosed |
| Autonomous browsing | Yes |
Where to use it
| Where to use it | |
|---|---|
| Web | No |
| iPhone | Yes |
| Android | Yes |
| Windows | Yes |
| macOS | Yes |
| Browser extension | No |
| French interface | Not disclosed |
| Spanish interface | Not disclosed |
Privacy
| Privacy | |
|---|---|
| Opt out of training on your chats | Not disclosed |
| Temporary chat | Not disclosed |
| EU data residency | Not disclosed |
A browser built around an agent
Comet belongs to the new wave of AI browsers. It carries over what Perplexity is known for (answers with sources, page summaries) and adds Comet Assistant, an AI agent that works in your tabs for you: opening pages, clicking, filling in forms. It launched on July 9, 2025 for Max subscribers and became free for everyone on October 2, 2025. It’s available on Mac, Windows, iOS and Android.
What you actually pay for
The download is free; the agent isn’t. According to Perplexity’s help center, Comet Assistant is not included in the free plan. It comes with paid subscriptions, subject to monthly limits:
| Plan | Price (billed annually) | Agent access |
|---|---|---|
| Free | $0 | Browser and search, no Comet Assistant |
| Perplexity Pro | $17/month | Included, monthly limits |
| Perplexity Max | $167/month | Included, higher limits |
An Education Pro plan at $10 a month is available to eligible students. The pages we checked don’t list month-to-month pricing or the interface languages.
The risk to understand: prompt injection
A browsing agent reads pages anyone can write. A booby-trapped page can hide instructions that try to take control of it: this is prompt injection. The stakes are high because the agent acts with your logged-in sessions, from email to online accounts.
In February 2026 Perplexity described its security approach: layered defenses with classifiers and confirmation prompts, an external audit by Trail of Bits, BrowseSafe, an open source detection model released in December 2025, and a bug bounty program. These measures lower the risk; they don’t remove it, and no vendor claims full protection.
Good habits
- Stay in control: approve sensitive actions yourself, the human-in-the-loop principle.
- Don’t leave the agent unattended on banking or government sites.
- Use a separate profile for automated tasks.
Comet keeps passwords and payment data local and encrypted. For a different take on the agentic browser, see Opera Neon.
Official sources: the Comet page and Perplexity’s post on Comet security.
Strengths
searching with sources · acting on your behalf
AI assistants
- Alexa+ · Amazon
- Apple Intelligence et Siri AI · Apple
- Brave Leo · Brave Software
- ChatGPT · OpenAI
- Microsoft Copilot · Microsoft
- DeepSeek · DeepSeek
Frequently asked questions
Is Comet free?
The browser has been free for everyone since October 2, 2025. However, according to Perplexity's help center, Comet Assistant agent tasks are not part of the free plan: you need Pro or Max, which come with monthly limits.
Which devices does Comet run on?
Perplexity offers Comet for Mac, Windows, iOS and Android. Because it's built on Chromium, the interface and most extensions will feel familiar to Chrome users.
What is prompt injection and why does it matter?
It's a technique where instructions are hidden inside a web page to hijack the agent reading it. An agent acting with your logged-in sessions could be pushed into doing things you never asked for.
Where are my passwords stored?
According to Perplexity, passwords and payment details saved in Comet are stored locally on your device in encrypted form.
Data sources
Data as of October 22, 2026
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