Dia 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
The Browser Company's AI browser that lets you chat with open tabs and run reusable skills.
AI tool · Free
Perplexity's AI browser with an assistant that can research, summarise and act on web pages.
The short answer
Choose Dia if you need…
- Chatting across open tabs
- Arc users wanting AI
Choose Comet if you need…
- Research-heavy browsing
- Perplexity users
Side-by-side
| Dia | Comet | |
|---|---|---|
| Type | Plugins & extensions · AI browsers | Plugins & extensions · AI browsers |
| Price | Freemium | Free |
| Platforms | macOS, Windows | 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
Dia
The Browser Company's AI browser that lets you chat with open tabs and run reusable skills. Thoughtful AI integration. Young product, and an AI browser sees everything you browse.
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
Dia
- Chatting across open tabs
- Arc users wanting AI
Comet
- Research-heavy browsing
- Perplexity users
Strengths
Dia
- Chat with tabs
- Custom skills
- Writing help in pages
- Chromium-based
Comet
- Built-in assistant
- Agentic page actions
- Chromium extensions
- Tab management
Frequently asked questions
What is the difference between Dia and Comet?
Dia: The Browser Company's AI browser that lets you chat with open tabs and run reusable skills. Comet: Perplexity's AI browser with an assistant that can research, summarise and act on web pages. Dia suits chatting across open tabs, while Comet suits research-heavy browsing.
Are Dia and Comet free?
Dia: Freemium. Comet: Free.
What are other alternatives to Dia and Comet?
Other options people compare them with include ChatGPT Atlas.
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.