Cloudflare launches Kitesurf, a browser built for AI agents that uses 7x less memory than Chromium

Cloudflare launches Kitesurf, a browser built for AI agents

Cloudflare is the latest company to join the race to build a new web browser. But instead of pitching a Chrome alternative to consumers, the internet infrastructure provider launched Kitesurf, a cloud-hosted browser designed specifically for AI agents. AI software is evolving from chatbots that answer questions to agents that can complete tasks on users' behalf. Browsers are a critical part of this transition, as they'll need to navigate the web and use websites, as humans do. Unlike traditional web browsers built for humans, a browser built for AI agents doesn't care about visual elements, like themes, tabs, or browser extensions, Cloudflare explained in its announcement. A browser designed for AI agents needs to manage context windows, performance, token costs, and scalability. It also faces a different threat model because an AI browser could be subject to vulnerabilities like prompt injection attacks and more, the company noted. With Kitesurf, AI developers will be able to build software that can navigate websites, fill out forms, and complete other browser-based tasks, without having to build their own browser software. Cloudflare says it decided to build Kitesurf just 12 weeks ago, and it runs entirely on top of the company's serverless platform, called Workers. Kitesurf is available for free while in beta in Browser Run, which lets developers programmatically control and interact with headless browser instances on Cloudflare's network. For developers, Cloudflare's pitch is that this enables AI agents to use the web more efficiently while using less computing power than Chromium, which keeps costs down. "Kitesurf is significantly more efficient in CPU and memory consumption than Chromium for common agentic tasks like screenshots and HTML extraction," according to the company. The browser itself was built from other technologies, including a modular rendering engine from Blitz; Firefox's CSS parser, Stylo; and Boa JS, a Rust ECMAScript engine. Everything else runs inside Cloudflare Workers. Although still new, Cloudflare says Kitesurf already passes around 215,000+ web platform tests, and it's adding hundreds more passing tests every week. Cloudflare also credited the open-source Rust headless engine, Obscura, for inspiring it to develop Kitesurf, noting that the first proof of concept was a port of Obscura to Workers. The company said the browser correctly renders pages like TodoMVC, a popular benchmark application for comparing JavaScript frameworks, along with Wikipedia, Hacker News, the Cloudflare Blog, and much of the Cloudflare dashboard.

Cloudflare built a browser for AI agents. It uses 7x less memory than Chromium and runs entirely on Workers.

Cloudflare launched Kitesurf, an agent-first browser on Workers. Uses 3-7x less CPU/memory than Chromium. Passes 215K+ WPT tests. Built in Rust/Wasm in 12 weeks. Free in beta via Browser Run. Will be open sourced. Cloudflare built a browser from scratch for AI agents and launched it today as a free beta inside its Browser Run product. 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. What remains is a lightweight engine optimised for the things agents actually care about, structured content extraction, screenshots, and isolation between sessions. The performance numbers are the headline. 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. Chromium is still faster on wall-clock time by about 1.7x because its JIT compiler outpaces a cold software renderer, but CPU and memory are what drive infrastructure bills. Lower resource usage means more concurrent agent sessions at lower cost. The project went from first commit to public beta in 12 weeks. It passes more than 215,000 Web Platform Tests and adds hundreds more each week. Bots now generate most web traffic, with AI agent activity growing nearly 8,000% in the past year. That surge is exactly why Cloudflare decided a Chromium-based headless browser, built for humans and repurposed for machines, was no longer the right tool. 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 is simultaneously blocking AI crawlers that harvest content without paying, while building the infrastructure for agents that do pay. That is the dual bet: charge the bots that take, and give the bots that work a cheaper, purpose-built tool to work with. Cloudflare plans to open source Kitesurf once it is ready, and eventually let customers deploy their own instances on their own accounts.

Cloudflare's new browser Kitesurf is designed for AI agents to browse the internet

AI agents just got their own browser that lets them browse the internet more efficiently. Cloudflare just entered the AI-browser race with a twist. Instead of building another Chrome alternative for people, the company launched Kitesurf, a cloud-hosted browser made only for AI agents. Since autonomous AI systems are increasingly the ones doing the actual browsing and scrolling online, Cloudflare just made its to claim that space. Why did Cloudflare make Kitesurf browser exclusively for AI agents? Traditional browsers carry features humans rely on daily, including tabs, extensions, and smooth visual rendering. AI agents need none of that. What they need is speed, low cost, and the ability to process content efficiently within limited context windows. Recommended Videos Kitesurf strips away the extras and runs entirely on Cloudflare Workers, its serverless computing platform, instead of relying on Chromium like most browsers do. Cloudflare says this approach uses significantly less computing power for common agent tasks like taking screenshots or extracting page content. This is important because running thousands of agent sessions on traditional browsers can be very expensive. What makes Kitesurf different from other browsers? Cloudflare built Kitesurf using a mix of existing open source technology, including a rendering engine called Blitz and Firefox's CSS parser Stylo. The project reportedly began just 12 weeks ago and already passed over 215,000 web platform compatibility tests. It can correctly render websites like Wikipedia and Hacker News, though it still cannot handle video playback or long authenticated sessions. Kitesurf is available for free during its beta phase through Cloudflare's Browser Run product, and anyone curious can try it firsthand through a public playground at kitesurf.cloudflare.app. Cloudflare also says it plans to open-source Kitesurf down the line, letting any customer deploy and run their own version. As AI agents gain more capabilities to book flights, fill out forms, and shop online for people, they need a platform to browse faster, and Cloudflare just built that missing piece.