Cloudflare is taking a different approach to the increasingly crowded AI browser market with Kitesurf, a new cloud-hosted browser designed specifically for software agents rather than people.
The browser runs on Cloudflare Workers and is aimed at developers building AI systems that need to interact with the web. Typical tasks include navigating websites, submitting forms, capturing screenshots and extracting page content. Instead of recreating a conventional desktop browser, Cloudflare has stripped away user-facing features such as tabs, themes and extensions in favour of lower resource use and more structured output.
That distinction could become increasingly important as agentic AI systems move beyond answering questions and start carrying out tasks across websites. Running a full Chromium instance for every agent is computationally expensive, particularly at scale. Cloudflare says Kitesurf was created partly to address that problem and began development around 12 weeks ago.
Under the hood, Kitesurf combines several existing technologies rather than relying on a single traditional browser engine. It uses rendering components from Blitz, Mozilla’s Stylo CSS parser and the Boa JavaScript engine, with the pieces compiled to WebAssembly and executed inside Cloudflare’s V8 isolates.
The browser also supports the Chrome DevTools Protocol, which should make it easier to integrate into existing automation stacks. Developers using tools such as Puppeteer and Playwright may therefore be able to experiment with Kitesurf without rebuilding their workflows from scratch.
Cloudflare’s early performance figures point to the trade-offs involved. For workloads such as screenshot generation and HTML extraction, the company says Kitesurf can use between three and seven times less CPU and memory than Chromium. It is currently slower, however, taking around 1.7 times as long to complete comparable tasks. Cloudflare says further work on image encoding and rasterisation should reduce that gap.
Compatibility remains another limitation. Kitesurf reportedly passes more than 215,000 Web Platform Tests and can render a range of conventional websites, but it cannot yet handle video playback, WebGL or certain bot-protection systems that rely on authentic browser TLS fingerprints. Persistent authenticated sessions are also not supported at this stage.
Security is an equally important part of the project. Browsers controlled by AI agents face risks that ordinary users rarely need to consider, particularly prompt injection attacks embedded in web content. A browser optimised around agents gives Cloudflare more room to build isolation and machine-specific security controls directly into the platform rather than adapting a browser designed around human interaction.
Kitesurf is currently available in beta through Cloudflare’s Browser Run service, with developers able to select it as an alternative browser engine. Cloudflare has also released a public testing environment and says it intends to open-source Kitesurf once development reaches a suitable point.
The project reflects a broader shift in how the web may be accessed. Browsers have spent decades being designed around screens, mouse pointers and human attention. If autonomous agents become a meaningful source of web traffic, infrastructure built specifically for machines could become just as important as the browsers people use themselves.
