Codex alternatives.

Claude in Chrome is Anthropic’s Chrome extension that lets Claude read, click and type in your own signed-in Chrome, on a paid Claude plan. Claude Code can use it with claude --chrome.

Keeps: an AI agent, your signed-in browser and a Windows version.

Pick it if you pay for Claude and want it to work in the Chrome you already use. The catch: Needs a paid Claude plan, from Pro at $20 a month.

Playwright MCP is Microsoft’s free, open-source MCP server that lets an agent drive Chrome, Edge, Firefox or WebKit through Playwright, in a profile of its own by default.

Keeps: an AI agent, your signed-in browser and a Windows version.

Pick it if you run agents in CI and tests that need a clean, repeatable browser. The catch: Its own profile has none of your sign-ins unless you use extension mode.

Chrome DevTools MCP is Google’s free, open-source MCP server and command line that gives a coding agent Chrome’s DevTools: the console, network, screenshots and performance traces.

Keeps: an AI agent, your signed-in browser and a Windows version.

Pick it if you debug web apps with an agent reading the console, network and traces. The catch: Supports only Google Chrome and Chrome for Testing.

Browser Use is an open-source Python library, command line and MCP server for building browser agents, with a paid cloud for running many browsers at once.

Keeps: an AI agent, your signed-in browser and a Windows version.

Pick it if you build your own browser agents in Python. The catch: The library is free; models and cloud browsers cost money.

Opera Neon is Opera’s agent browser for Mac and Windows. Its own agents act in your live session on a $19.90 plan, and since August 2026 outside agents like Claude Code can use it free through its MCP Connector.

Keeps: an AI agent, your signed-in browser and a Windows version.

Pick it if you want Claude Code or another MCP client to use a real signed-in browser, free. The catch: Opera’s own agents need the $19.90 a month plan.

Aside is an AI agent browser from a Y Combinator startup, on Chromium, for Mac and Windows. Its agent does multi-step work in the sites you are signed in to, on Aside’s own models or your ChatGPT or Claude plan.

Keeps: an AI agent, your signed-in browser and a Windows version.

Pick it if you want an agent for multi-step work across your signed-in sites, on Mac or Windows. The catch: The free plan has 500 AI credits a month; more is Pro at $20 or Max at $200.

Tabbit is a free Chromium AI browser for Mac and Windows from Lumina Lab in Singapore, with chat, an agent mode and a choice of many vendors’ models.

Keeps: an AI agent, your signed-in browser and a Windows version.

Pick it if you want a free agent browser with a wide choice of models, Chinese ones included. The catch: Top models and heavy agent use need Pro at $30 a month.