- Kitesurf runs entirely on Cloudflare Workers, uses Rust compiled to WebAssembly, and strips out everything a human browser needs but an agent does not: tabs, extensions, themes, pixel-perfect rendering, and 60-fps scrolling.
- Kitesurf uses 7x less memory than Chromium and is designed for agent workloads.
- On a 14-URL test corpus, Kitesurf used 3.1x less CPU for screenshots and 3.8x less for HTML extraction compared to Chromium. Memory consumption was 4.7x lower for screenshots and 7x lower for HTML extraction.
- Kitesurf treats every page load as untrusted input, every session as stateless, and every component as isolated, a security model that matches how agents actually operate.
- The browser works with Puppeteer, Playwright, and any MCP client that speaks CDP.
- Cloudflare plans to open source Kitesurf once it is ready, and eventually let customers deploy their own instances on their own accounts.
Cloudflare's Kitesurf is a groundbreaking browser tailored for AI agents, operating solely on Cloudflare Workers. It boasts a remarkable 3-7 times reduction in CPU and memory usage compared to Chromium, making it a cost-effective solution for infrastructure.12
Developed in just 12 weeks, Kitesurf has successfully passed over 215,000 Web Platform Tests and continues to add hundreds more weekly. The browser is built using Rust compiled to WebAssembly, eliminating unnecessary features for AI agents, such as tabs and extensions, which enhances its efficiency.
In performance tests, Kitesurf demonstrated 3.1 times less CPU usage for screenshots and 4.7 times lower memory consumption for the same task compared to Chromium. For HTML extraction, it achieved 3.8 times less CPU and 7 times lower memory usage. Although Chromium remains faster in wall-clock time due to its JIT compiler, Kitesurf's efficiency in CPU and memory is crucial for reducing infrastructure costs.3
Kitesurf treats every page load as untrusted and every session as stateless, aligning with the operational model of AI agents. It is compatible with tools like Puppeteer and Playwright, and Cloudflare plans to open source the browser, allowing customers to deploy their own instances.456
“Kitesurf strips out tabs, extensions, and pixel-perfect rendering, treating every page load as untrusted input. On a 14-URL test corpus, it used 3.1x less CPU for screenshots and 4.7x lower memory, though Chromium remains 1.7x faster on wall-clock time.”
