Comet browser: Perplexity's free AI browser with agentic Assistant

Update August 2026: Perplexity AI has released Comet browser, a new AI-native web browser that integrates Comet Assistant — an autonomous agent that browses, composes answers, fills out forms, makes purchases, and performs multiple steps of online tasks on your behalf, for free worldwide. Comet is available for Windows, macOS, Android, and iOS, is based on Chromium (supports all Chrome extensions), and launched as an exclusive perk for paid Max subscribers of $200 per month. The Greek guide explains what Comet browser does, how to download it, how Comet Assistant works, and what the real limits of the technology are for safe use.

See also: OpenAI ChatGPT Work: The new AI agent for businesses

What is Comet browser: Perplexity's first agentic AI browser

Comet an AI-native web browser developed by Perplexity AI, built on the same Chromium foundation as Google Chrome and Microsoft Edge. The big difference: it integrates the Comet Assistant, an AI agent that lives in a sidebar and sees what you're reading, what tabs you're working on, what tasks you want to complete. Instead of classic browsing where you click on links, Comet lets you ask in natural language: "compare the two laptops I have open", "reply to this email with an appointment for Tuesday", "find flights to Paris next week".

Comet falls into the new category of agentic browsers — browsers with built-in AI that performs actions rather than just responds. The main competitors are OpenAI ChatGPT Atlas and Anthropic's Claude for Chrome

Comet Assistant how it works: An AI agent in each tab

The main feature is Comet Assistant, a fixed AI assistant in the right sidebar (Alt + A keys). Its capabilities:

• Content Analysis: Explains concepts, answers questions about the current page, describes images
• Cross-tab intelligence: Compares information across multiple open tabs simultaneously
• Automatic task completion: Compose emails, book meetings, make online purchases
• Autonomous navigation: Fills out forms, navigates web pages, interacts with content
• One-Click Summarization (Alt + S): Instant summaries for articles, videos, PDFs, and social media
• Voice Mode (Shift + Alt + V): Full voice control, with the new GPT Realtime 1.5 model
• Smart Tab Management: Groups related tabs, closes duplicates, creates color-coded collections

One of the most powerful features is @tab-name — you can refer to a specific open tab by its name so that the assistant can get context only from that. Useful for professional product comparisons or research.

Comet browser free: From $200/month to free

Comet launched in July 2025 as an exclusive for Perplexity Max ($200 per month, PC only). On July 29, 2026, Perplexity officially announced the complete removal of the paywall — Comet is now free for everyone, across all platforms: Windows, macOS, Android, and iOS.

Core features remain free without an account. Advanced AI features like Deep Research and agentic tasks with external services are tied to the Perplexity subscription tier:

• Free: Full browser use, Comet Assistant, basic browsing, ~5 Pro Searches per day
• Comet Plus ($5/month): Access to premium content from top publishing sources
• Pro ($20/month): Unlimited Pro Searches, all models (GPT-5, Claude, Gemini), Comet Plus free
• Max ($200/month): Perplexity Computer (background agent), Email Assistant, unlimited Labs

Comet browser download: How to install it in 3 steps

Installation takes less than 5 minutes:

1. Visit the official page perplexity.ai/comet — explicitly avoid unofficial sources due to malware clones
2. Select version for your operating system (Windows 10/11, macOS, or search on Google Play / App Store for mobile)
3. Run installer, select Chromium data import (bookmarks, passwords, history), and alternatively set Comet as default browser

The installation size is approximately 14 MB for the basic installer. Minimum requirements: Windows 10 or later, 8 GB RAM recommended, 500 MB free storage space. For macOS, macOS 12 Monterey or later is required.

Comet for mobile: Android and iOS available

Comet was first released for Android in March 2026, while the iOS was officially announced on July 29, 2026, completing its presence on all major platforms. The mobile version retains all the main features:

• Voice Mode improved with Greek support for hands-free use
• Hybrid search: Traditional search results for local queries + AI answer engine for deep research
• Cross-device sync: Start research on desktop, continue on iPhone without losing context
• Built-in ad blocker with per-site whitelist
• Siri Integration: You can ask Siri and the query will be forwarded to Comet Assistant

Security Risks: Prompt Injection and What You Shouldn't Delegate

Agentic browsers are not infallible. Security researchers have demonstrated prompt injection attacks, where malicious instructions hidden in a web page can manipulate the AI ​​assistant into taking actions the user did not request — such as sending data to third parties. Perplexity officially states that “no detection system is perfect.

The SecNews technical team recommends the following protection measures:

• Do not give Comet Assistant access to bank accounts or e-banking for standalone transactions.
• Avoid connecting the agent to corporate systems containing sensitive data
• For corporate email, use read-only access at first, upgrade carefully
• Always verify actions you request from the agent before confirming, especially purchases or sending emails.
• Greek businesses with GDPR obligations must register Comet as a data processor
• Update your browser regularly — security patches for prompt injection are released frequently

See also: CaptiveCrunch: Midnight Blizzard attack on hotel Wi-Fi

Comet vs Chrome vs Edge: Who Wins in 2026

Frequently asked questions about Comet browser

Does Comet browser work well in Greek?
Yes. The Greek language is fully supported for both questions and page content analysis. Voice Mode recognizes Greek voice, while Assistant responds with high-level Greek syntax.

Can I transfer bookmarks and passwords from Chrome?
Yes, with one click. Because Comet is based on Chromium, it automatically imports bookmarks, history, passwords saved in Chrome/Edge, as well as all installed extensions upon first launch.

Do I need a Perplexity account to use Comet?
Not for basic browsing. However, a Perplexity account unlocks Assistant chat history, cross-device syncing, and Pro Search features when you sign up for a paid plan.

How does Comet protect my credentials (codes, cards)?
Codes, card details and login credentials are never sent to Perplexity servers. They are stored locally on the device, using the operating system's secure vault (Windows Credential Manager, macOS Keychain).

Does Comet affect my computer's performance?
Slightly more than Chrome in RAM usage, due to Comet Assistant remaining active. On a modern system with 16 GB of RAM, no impact is observed. On older systems with 8 GB of RAM, it is recommended to avoid many simultaneous tabs.

Can Comet Assistant complete purchases autonomously?
Yes, through the PayPal + Perplexity partnership (Instant Buy) for US users. For Greek users, the Assistant can complete order forms autonomously but the final confirmation remains with the user as a security measure.

Comet browser is one of the most important technology announcements of the summer of 2026. The change in strategy from $200/month to free availability reveals the intensity of competition with ChatGPT Atlas and Claude for Chrome. For Greek users, Greek support and agentic features provide opportunities for professionals who want to automate email research and management. The SecNews editorial team will update with every new feature, especially with the Background Assistants expected in Greece in the fall. Sources: Perplexity AI blog, Comet for iOS launch.