Cloudflare launches Kitesurf, a stateless browser engine built for AI agents

Cloudflare launched Kitesurf on Aug. 6, 2026, a stateless browser engine built for AI agents rather than people, running entirely inside V8 isolates on Cloudflare Workers.

Most agents today drive a full copy of Chromium, which is heavy and carries session state between page loads. Kitesurf, written in Rust, treats every page load as untrusted input and rebuilds the browser around automation instead of a human user. Its three parts handle session state via the Chrome DevTools Protocol, HTML and CSS parsing, and pixel rendering.

Cloudflare says Kitesurf uses 3.1 times less CPU for screenshots and 7 times less memory for HTML extraction than a warm Chromium pool, and passes more than 215,000 Web Platform Tests. Those figures are the company’s own and have not been independently verified.

Per Cloudflare’s Kitesurf announcement, the engine supports the Puppeteer, Playwright and Chrome DevTools Protocol automation interfaces but not video or WebGL, and was built in about 12 weeks. It is free during beta through Cloudflare’s Browser Rendering product.

Kitesurf is an early bet that agents need their own web runtime, not a repurposed consumer browser. The missing video and WebGL support is the limit of that trade-off for now.