2025/10/26

Comet AI Browser: Complete Guide & Competitor Comparison

In-depth analysis of Perplexity's Comet AI browser, comprehensive comparison with ChatGPT Atlas, Dia, Arc Max and other competitors to help you choose the best AI browser

Comet AI Browser: Complete Guide & Competitor Comparison

The 2025 AI Browser War

Perplexity AI's Comet browser, launched in July 2025, marks the browser market's entry into the AI-native era. This article provides an in-depth comparison of Comet with major competitors.

🚀 Comet AI Browser Core Features

Comet is an AI-native browser launched by Perplexity AI in July 2025, now freely available to users worldwide. As a next-generation intelligent browser, Comet deeply integrates AI into every aspect of the browsing experience, rather than simply adding AI features to a traditional browser.

1. 🤖 Comet Assistant - The Intelligent Core

Comet Assistant is the browser's core feature, capable of understanding not only current webpage content but also working across multiple tabs.

📄 Web Summary & Analysis

Can quickly summarize YouTube videos, Google Docs, articles, or any webpage content.

Real Test Case:

Searched "curry rice recommendations in Hsinchu"
Comet queried 17 articles
Provided 5 recommended restaurants
Included specialty introductions and fan page links

Smarter than traditional search engines, directly providing structured answers

🔄 Cross-Tab Comparison

Can extract and compare data from different tabs.

Use Cases:

Compare product specifications across e-commerce sites
Compare prices and reviews
Integrate information from multiple sources

⚡ Task Automation

Can book meetings, send emails, manage calendar events, and even complete online purchases.

Real Test Case: Asked to "book two tickets for F1 movie tonight in Hsinchu"

Automatically searched Vieshow Cinemas website

Found the cinema

Checked showtimes

Selected seats

Proceeded to checkout

Fully automated, no manual operation required!

📚 Browse History Understanding

As a browser, Comet can track all user behavior from search to browsing.

Example: Ask "What was the last video I watched?", AI will:

Summarize video highlights
Provide links
Offer related suggestions

2. 🔍 Perplexity Search Engine Integration

Comet sets Perplexity's AI search engine as the default homepage.

Core Advantage

Unlike traditional search engines that return 10 blue links, Perplexity provides summary answers with cited sources, making search faster, more reliable, and actionable.

Key Features:

✅ Every answer cites real source links
✅ Verifiable information, avoiding AI hallucinations
✅ Faster information retrieval

3. 🛠️ Technical Architecture

Comet is built on the Chromium framework, ensuring:

Advantage	Description
🔌 High Compatibility	Fully compatible with modern web and Chrome extensions
🔄 Seamless Migration	Users can easily migrate workflows without relearning
📱 Cross-Platform	Wide compatibility across desktop and mobile platforms

4. 🧠 Multi-LLM Support

Comet's sidebar integrates multiple large language models:

GPT - OpenAI's powerful model
Claude - Anthropic's conversation expert
Gemini - Google's multimodal model
Grok - xAI's real-time model
Sonar - Perplexity's proprietary model

Users can choose the most suitable model for different tasks

⚔️ Comet vs Other AI Browsers

🆚 vs ChatGPT Atlas

ChatGPT Atlas was released on October 21, 2025, as OpenAI's entry into the browser market.

Common Features

✅ Both built on Chromium
✅ Both support powerful Agent mode for automated tasks
✅ Both provide cross-tab context understanding

Core Distinctions

Feature	Comet	ChatGPT Atlas
Citations	✅ Default citation verification	⚠️ Partial support, not citation-focused
Platform	Windows, macOS	macOS only (others coming)
Pricing	🆓 Free (rate limited)	Browser free, premium needs ChatGPT subscription
Direct Integration	✅ Direct data connection with LinkedIn, Gmail	⚠️ Requires AI navigation UI (slower)
Launch Date	July 2025	October 21, 2025

User Experience Comparison

Comet Advantages

Faster: Direct data integration
Citation Verification: Better for research
Enterprise Ready: More suitable for professionals

Atlas Advantages

Conversational Help: More natural interaction
ChatGPT Ecosystem: Seamless integration
Brand Trust: OpenAI backing

🆚 vs Dia Browser

Dia is an AI-native browser launched by The Browser Company in June 2025.

Dia Limitations

🔒 macOS only and invite-required
💰 Will eventually launch paid Pro plan ($20/month)
🧪 Still in Beta stage

Dia Features:

🏗️ AI-Native Architecture: Designed from scratch, AI is core
💬 Address Bar as Chat: Can enter websites, search, or chat with AI
⚡ Skills Feature: Users can create custom AI shortcuts
📖 Browse History: Optional 7-day browsing history as context

Design Philosophy

Dia's design philosophy is more radical, completely rethinking what a browser should be.

Innovations:

Address bar and AI chat box merged
Custom AI skills
Deep browsing history integration

Aspect	Comet	Dia
Availability	✅ All platforms, free	⚠️ macOS only, invite-only
Maturity	✅ Stable release	🧪 Beta stage
Pricing	🆓 Free	💰 Future $20/month
Design	Traditional + AI	Radical AI-native

🆚 vs Arc Max

Arc Max is Arc browser's AI enhancement suite, launched in October 2023.

Core Features:

Feature	Description
⚡ 5-Second Preview	Hover over links to see AI-generated summaries
💬 Ask on Page	Ask AI anything about the current page
📁 Tidy Downloads	Automatically organize download file names
🤖 ChatGPT Integration	Use ChatGPT directly in command bar

Positioning Difference

Arc Max features are lighter, mainly assistive tools, without independent chat interface or powerful Agent capabilities. Suitable for users needing simple AI assistance.

🆚 vs Brave Leo

Brave Leo is Brave browser's AI assistant, released in November 2023.

Privacy Advantage

Brave Leo's biggest feature is privacy protection

Privacy Features:

🔒 Industry-Leading Privacy

✅ No login or account required for free version
✅ Doesn't log chats, not used for model training
✅ Uses unlinkable subscription tokens
✅ All AI models hosted through Brave's own infrastructure

Even paid subscriptions can't track usage behavior!

Feature List

📄 Real-time webpage or video summaries
🧠 Supports multiple AI models (including Claude)
📱 Cross-platform support (Windows, macOS, Linux, Android, iOS)
🖼️ Image understanding capabilities

Comparison Analysis

Aspect	Brave Leo	Comet
Privacy	⭐⭐⭐⭐⭐	⭐⭐⭐
AI Capability	⭐⭐⭐	⭐⭐⭐⭐⭐
Agent Function	❌ Not supported	✅ Powerful
Citation	⚠️ Limited	✅ Complete

Brave Leo is best for privacy-first users, but lacks Comet's depth and breadth in AI capabilities

🆚 vs Microsoft Edge Copilot Mode

Copilot Mode is Microsoft Edge's AI browser feature launched in July 2025.

Featured Functions:

🔄 Multi-Tab Context: Can view all open tabs and provide comprehensive answers
⚡ Copilot Actions (Preview): Can unsubscribe from emails, clear cache, etc.
📚 Journeys: Remembers user browsing projects and groups by theme
🚀 Quick Assist: Provides help in dynamic panel without leaving page

Microsoft Ecosystem Advantage

✅ Deep integration with Microsoft 365
✅ Enterprise-grade security
✅ Familiar interface
✅ Free to use

Current Limitations

⚠️ Just officially launched, reliability still improving
⚠️ Agent functions sometimes fail to complete tasks
⚠️ Mainly for users deeply invested in Microsoft ecosystem

⚖️ Comet's Strengths & Weaknesses

✅ Core Strengths

📚 Citation Verification

Provides source citations by default, suitable for research requiring verifiable information.

Why It Matters:

Avoids AI hallucinations
Traceable information sources
Suitable for academic and professional use

🆓 Free & Feature-Complete

Fully free and open since October 2025.

Included Features:

Complete AI assistant
Multi-LLM support
Agent functionality
No paid subscription required

⚡ Fast

Direct data integration makes it faster than browsers requiring AI navigation UI.

Performance Advantages:

Faster response times
Fewer intermediate steps
Smoother experience

💼 Enterprise Ready

Suitable for enterprise users needing accurate information and efficient workflows.

Enterprise Features:

Verifiable information
Cross-tab collaboration
Task automation

⚠️ Major Weaknesses

Serious Security Vulnerabilities

In October 2025, security researchers discovered multiple serious vulnerabilities

🔴 CometJacking Attack

Vulnerability Discovery

Allows attackers to hijack AI assistant through malicious links

Impact Scope

Can steal emails, calendars, and other sensitive data

CVE Score

Another vulnerability scored 8.6 (high severity)

OCR Vulnerability

Brave researchers found Comet's OCR extracts all visible and hidden text, attackers can use steganography to embed malicious instructions

Experience Issues

⚠️ Tab Replacement: May replace existing tabs instead of opening new ones for certain web apps
⚠️ Slight Delays: May affect power users
⚠️ Learning Curve: Need to adapt to AI interaction

⚖️ Reddit Lawsuit

Reddit sued Perplexity, alleging:

Unauthorized data scraping
Use for AI training
Copyright infringement

🔒 Privacy Issues

Privacy concerns from AI integration:

Requires access to browsing history
Requires access to tab content
Users need to carefully manage permissions

📊 Comprehensive Comparison Table

Browser	Citations	Platform	Price	Agent	Privacy	Best For
Comet	⭐⭐⭐⭐⭐	Win, Mac	🆓	⭐⭐⭐⭐⭐	⭐⭐⭐	Research
ChatGPT Atlas	⭐⭐⭐	macOS	🆓/💰	⭐⭐⭐⭐⭐	⭐⭐⭐	ChatGPT users
Dia	⭐⭐⭐	macOS	💰	⭐⭐⭐⭐	⭐⭐⭐	Early adopters
Arc Max	⭐⭐	Multi	🆓	⭐⭐	⭐⭐⭐⭐	Light AI assist
Brave Leo	⭐⭐	All	🆓/💰	⭐	⭐⭐⭐⭐⭐	Privacy-first
Opera Aria	⭐	Multi	🆓	⭐⭐	⭐⭐⭐	Basic use
Edge Copilot	⭐⭐⭐	Multi	🆓	⭐⭐⭐⭐	⭐⭐⭐	MS ecosystem

🎯 Selection Guide

Choose Based on Needs

Different use cases suit different AI browsers

📚 Research-Intensive Work

Recommended: Comet

Reasons:

✅ Clear citation and speed advantages
✅ Suitable for scenarios requiring verifiable information
✅ Powerful cross-tab comparison
✅ Free to use

💬 Daily Browsing & Conversation

Recommended: ChatGPT Atlas or Arc Max

Atlas for:

ChatGPT power users
Need conversational help
macOS users

Arc Max for:

Need simple AI assistance
Multi-platform users
Lightweight needs

🔒 Privacy Protection

Recommended: Brave Leo

Reasons:

⭐ Industry-leading privacy protection
⭐ No account required
⭐ Doesn't log chats
⭐ All-platform support

🏢 Specific Ecosystems

Microsoft Ecosystem: Edge Copilot Mode

Deep Microsoft 365 integration
Enterprise features

Mac Early Adopters: Dia

AI-native design
Innovative experience
Invite required

🛡️ Security Recommendations

Important Reminder

Given Comet's known security vulnerabilities, users should take precautions

Avoid Sensitive Operations

Avoid using agentic features during sensitive sessions (banking, email, cloud storage)

Be Cautious with Links

Don't click links from unknown sources, especially when using AI features

Monitor AI Behavior

Monitor AI assistant behavior, don't entrust privacy-related tasks to it

Wait for Fixes

Wait for Perplexity to fix disclosed vulnerabilities before using for critical tasks

🔮 Market Landscape & Future Trends

📈 Current Browser Market

As of September 2025:

Browser	Market Share
Chrome	71.77%
Safari	13.9%
Edge	4.67%
Others	9.66%

AI browsers are trying to challenge this landscape but are still in early stages

🚀 AI Browser Disruption

2025 is seen as a turning point after 20 years of browser innovation stagnation.

AI browsers represent the first fundamental shift in how users interact with the web since the desktop-to-mobile browsing transition:

📱 From passive "display tools"
🤖 To active "decision makers"
🎯 Capable of understanding user intent
🔮 Predicting needs
⚡ Taking action on behalf of users

🎯 Conclusion

Comet represents one direction for the future of browsers—deeply integrating AI into the browsing experience, shifting from passive browsing to active collaboration.

Core Strengths

✅ Citation verification ensures reliable information
✅ Free access lowers barriers to entry
✅ Speed enhances work efficiency
✅ Enterprise-ready meets professional needs

Important Notes

⚠️ Security vulnerabilities exist, use with caution
⚠️ Privacy issues need attention
⚠️ Legal disputes unresolved

Despite security concerns, its advantages in citation verification, speed, and free access make it a strong choice for research and enterprise users. As the AI browser market matures, these tools will continue to evolve, potentially redefining how we interact with the internet.

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