# Agentic browsers

> AI browsers that act on a user's behalf. They mimic a real browser, so they carry no stable bot user-agent — verify by IP or signature.

_4 of 41 · [all The AI Crawler Registry](/crawlers)_

- [ChatGPT Atlas (agent mode)](/crawlers/chatgpt-atlas) — OpenAI · agentic-browsing. OpenAI's ChatGPT Atlas browser (launched 2025-10-21) embeds ChatGPT into web navigation; its 'agent mode' takes actions on the user's behalf inside the browser. As a local Chromium-based browser it presents like ordinary browser traffic with no stable AI user-agent token — included here per the agentic-browser taxonomy, verifiable by IP/signature only.
- [Perplexity Comet (assistant/agent)](/crawlers/perplexity-comet) — Perplexity · agentic-browsing. Perplexity's Comet is a Chromium-based browser fork that runs locally and performs multi-tab agentic actions inside the user's session. Unlike Perplexity's cloud crawlers, it has no verifiable identity layer at the network level — included here per the agentic-browser taxonomy, verifiable by IP/signature only.
- [OpenAI Operator (Computer-Using Agent)](/crawlers/openai-operator) — OpenAI · agentic-browsing. OpenAI's Operator (released 2025-01-23) was a browsing agent powered by the Computer-Using Agent (CUA) model that performed online tasks in a browser on the user's behalf. It was deprecated after the release of ChatGPT agent and shut down on 2025-08-31. Retained here as a deprecated agentic-browser record for history/freshness.
- [Project Mariner](/crawlers/project-mariner) — Google · agentic-browsing. Google's Project Mariner (introduced Dec 2024 with Gemini 2.0) was an experimental web-browsing agent that navigated pages and took actions on a user's behalf via a Chrome extension. Google shut it down as a standalone product on 2026-05-04; its features moved into the Gemini API and Gemini Agent (see the Google-Agent record). Retained here as a deprecated agentic-browser record for history/freshness.