Comet vs Rotunda
Comet
perplexity.aiRotunda
rotunda.shSide by side
| Figure | Comet | Rotunda |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | — |
| macOS | Yes | — |
| iOS | Yes | — |
| Android | Yes | — |
| Plans published | 1 | 0 |
| Spec score · AI Browsers | 8.6 (#5) | 6.6 (#23) |
| Integrations | For email or schedule tasks, Comet may ask the user to opt in to Perplexity Connector access to third-party services, and permissions can later be revoked or changed in Perplexity settings. | The site says Rotunda works with the local-first OpenClaw and Hermes agents and with Playwright. |
| Open source | No | Rotunda’s site identifies the project as open source under the MPL-2.0 license. |
| Product | Comet is Perplexity’s AI browser with a personal assistant built into the browsing experience. | Rotunda describes itself as an agent-first browser forked from Firefox for agents running locally on a user's laptop and home network. |
| Support | For Comet-specific questions, Perplexity lists [email protected] as its contact address. | For suspected fingerprinting issues, the site instructs users to enable ROTUNDA_DEBUG_DUMP and file an issue with the dump. |
Plans
In their own words
Comet
Comet is Perplexity’s AI browser, with an assistant built into browsing. The assistant can answer questions about open tabs, search the web and interact with websites on the user’s behalf. Examples include summarizing or explaining content, comparing tabs, drafting emails, scheduling meetings and making purchases. Perplexity is the default search engine, and Comet uses Chromium. It is free to download at free for Android, iOS, macOS and Windows. Comet supports most Chrome extensions, though users must install and configure them again because extension data does not transfer from Chrome. The browser stores URLs, searches, cookies, open tabs and site permissions locally. Website credentials are kept in the device’s secure vault, not on Perplexity’s servers. Privacy settings allow deletion of browsing and search history, cookies and cached data. However, some queries may involve sending page context, including text or email, to Perplexity’s servers. Email or schedule tasks may require opting in to Perplexity Connector access; those permissions can later be changed or revoked. Comet says users can stop the agent and should review actions before confirming them.