ChatGPT Atlas vs Comet
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
AI tool · Freemium
OpenAI's web browser with ChatGPT built in, including a sidebar, browser memories and agent mode.
AI tool · Free
Perplexity's AI browser with an assistant that can research, summarise and act on web pages.
The short answer
Choose ChatGPT Atlas if you need…
- ChatGPT users
- Letting an agent complete web tasks
Choose Comet if you need…
- Research-heavy browsing
- Perplexity users
Side-by-side
| ChatGPT Atlas | Comet | |
|---|---|---|
| Type | Plugins & extensions · AI browsers | Plugins & extensions · AI browsers |
| Price | Freemium | Free |
| Platforms | macOS | macOS, Windows, Android |
| Works with | Chrome | Chrome |
| Hands-on tested by us | Not yet | Not yet |
| Last checked | 2026-10-29 | 2026-10-29 |
What each one is
ChatGPT Atlas
OpenAI's web browser with ChatGPT built in, including a sidebar, browser memories and agent mode. Deep ChatGPT integration. Agent browsing raises prompt-injection and privacy risks; limit what it can access.
Comet
Perplexity's AI browser with an assistant that can research, summarise and act on web pages. Convenient for research. Agentic browsing has known prompt-injection risks; be careful with logged-in sites.
Best for
ChatGPT Atlas
- ChatGPT users
- Letting an agent complete web tasks
Comet
- Research-heavy browsing
- Perplexity users
Strengths
ChatGPT Atlas
- ChatGPT sidebar on any page
- Agent mode
- Browser memories
- Chromium extensions
Comet
- Built-in assistant
- Agentic page actions
- Chromium extensions
- Tab management
Frequently asked questions
What is the difference between ChatGPT Atlas and Comet?
ChatGPT Atlas: OpenAI's web browser with ChatGPT built in, including a sidebar, browser memories and agent mode. Comet: Perplexity's AI browser with an assistant that can research, summarise and act on web pages. ChatGPT Atlas suits chatgpt users, while Comet suits research-heavy browsing.
Are ChatGPT Atlas and Comet free?
ChatGPT Atlas: Freemium. Comet: Free.
What are other alternatives to ChatGPT Atlas and Comet?
Other options people compare them with include Dia.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.