Cloudflare launches Kitesurf, a cloud browser built for AI agents
Cloudflare has introduced Kitesurf, a cloud-hosted browser designed not for human users but for AI agents that need to complete tasks on the web, currently free to use in beta on its serverless platform.
Internet infrastructure company Cloudflare has entered the growing race to build new web browsers, but with a distinctly different target audience. Rather than offering a consumer alternative to browsers like Chrome, the company has built Kitesurf, a browser designed specifically for AI agents rather than people.
AI software is shifting from chatbots that simply answer questions toward agents capable of completing tasks on a user's behalf. Since these agents need to navigate websites and interact with them much like humans do, browsers are becoming a critical piece of that transition.
According to Cloudflare, a browser meant for AI agents doesn't need to worry about visual features that matter to humans, such as themes, tabs or extensions. Instead, priorities shift toward managing context windows, performance, token costs and scalability. The company also noted that such a browser faces a different threat model, including risks like prompt injection attacks.
With Kitesurf, developers will be able to build AI software that navigates web pages, fills out forms and performs other browser-based tasks without having to create their own browser technology from scratch.
Development and technology
Cloudflare says it built Kitesurf in just 12 weeks, and the browser runs entirely on top of its serverless platform, Workers. It's currently available for free during its beta period through Browser Run, a service that lets developers programmatically control headless browser instances on Cloudflare's network.
The company claims Kitesurf uses significantly less CPU and memory than Chromium for common agentic tasks such as taking screenshots and extracting HTML, helping keep computing costs down.
The browser combines several existing technologies, including a modular rendering engine from Blitz, Firefox's CSS parser Stylo, and Boa JS, a Rust-based ECMAScript engine. Cloudflare also credited the open-source Rust headless engine Obscura as an inspiration for the project.
While still new, Kitesurf already passes more than 215,000 web platform tests, a number the company says grows weekly. Cloudflare states the browser correctly renders sites including Wikipedia, Hacker News, the Cloudflare Blog and much of its own dashboard.
