ChatGPT Atlas vs Comet
A side-by-side comparison of ChatGPT Atlas and Comet, two Assistant tools, drawn from Ignaite's continuously-verified listings.
Compared from listings verified as of
ChatGPT Atlas
AssistantOpenAI's web browser with ChatGPT built in — sidebar, memories, and agent mode.
View ChatGPT AtlasComet
AssistantPerplexity's AI browser with a sidebar assistant that acts across your tabs.
View CometAt a glance
| Attribute | ChatGPT Atlas | Comet |
|---|---|---|
| Category | Assistant | Assistant |
| Pricing | FREEMIUM | FREEMIUM |
| License | Proprietary | Proprietary |
| Deployment | Local | Local |
| Platforms (differs) | macOS | Windows, macOS, Android, iOS |
| Model support (differs) | Single model (proprietary) | Multi-model |
| Vendor (differs) | OpenAI | Perplexity |
The honest brief
ChatGPT Atlas
No browser ties deeper into ChatGPT — your existing account brings memories, chat history, and agent mode to every page without a separate assistant.
- ChatGPT sidebar on every page
- Browser memories carry context
- Agent mode automates web tasks
- Familiar Chromium foundation
- macOS only so far
- Agent mode needs a paid plan
- Closed source
- Prompt-injection risks under scrutiny
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