Comet vs Dia
A side-by-side comparison of Comet and Dia, two Assistant tools, drawn from Ignaite's continuously-verified listings.
Compared from listings verified as of
Comet
AssistantPerplexity's AI browser with a sidebar assistant that acts across your tabs.
View CometAt a glance
| Attribute | Comet | Dia |
|---|---|---|
| Category | Assistant | Assistant |
| Pricing | FREEMIUM | FREEMIUM |
| License | Proprietary | Proprietary |
| Deployment | Local | Local |
| Platforms (differs) | Windows, macOS, Android, iOS | macOS |
| Model support (differs) | Multi-model | — |
| Vendor (differs) | Perplexity | The Browser Company |
| Capabilities (differs) |
|
|
The honest brief
Comet
The only major AI browser free across desktop and mobile, with an assistant that can act on open tabs, email, and calendar from the sidebar.
- Free on desktop and mobile
- Sidebar assistant acts across tabs
- Chromium base imports Chrome data
- Deep Research and voice built in
- Closed source
- Frontier models need Pro or Max
- Publisher content costs $5/month
- Assistant needs broad data access
Dia
From the makers of Arc; AI lives in the address bar aware of your open tabs and history, not a bolted-on chatbot.
- AI baked into the URL bar
- Tab- and history-aware context
- Reusable 'skills'
- Free tier for light use
- macOS only
- Closed source
- Pro at $20/mo to lift AI limits
- Young product, evolving feature set
When to pick which
Across the signals we compare, Comet and Dia differ on platforms:
- Platforms
- Windows, macOS, Android, iOS · macOS
Their capability lists differ in recorded depth — compare the full lists above before deciding.