Cloudflare is the latest company to join the race to develop a new web browser. But instead of marketing 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 your behalf. Browsers are an important part of this transition because they need to navigate the web and use websites just like humans do.
Unlike traditional web browsers built for humans, browsers built for AI agents don’t care about visual elements like themes, tabs, and browser extensions, Cloudflare explained in the announcement. Browsers designed for AI agents must manage context windows, performance, token cost, and scalability. The company notes that AI browsers also face a different threat model, as they can be susceptible to vulnerabilities such as prompt injection attacks.
Kitesurf enables AI developers 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 that it runs entirely on its serverless platform called Workers. Kitesurf is available for free during Browser Run’s beta and allows developers to programmatically control and interact with headless browser instances on Cloudflare’s network.
Cloudflare’s pitch to developers is that it allows AI agents to use the web more efficiently and uses less computing power than Chromium, reducing costs.
According to the company, “Kitesurf is significantly more CPU and memory efficient than Chromium for common agent tasks such as screenshots and HTML extraction.”
The browser itself is built from other technologies, including Blitz’s modular rendering engine. Stylo, Firefox’s CSS parser. Boa JS (Rust ECMAScript engine). Everything else runs within Cloudflare Workers. Although still new, Kitesurf has already passed approximately 215,000+ web platform tests and is adding hundreds more and passing tests every week, according to Cloudflare.
Cloudflare also acknowledged that Obscura, the open source Rust headless engine, was the inspiration for the development of Kitesurf, noting that the initial proof of concept was porting Obscura to Workers.
According to the company, the browser correctly renders pages like TodoMVC, a popular benchmarking application for comparing JavaScript frameworks, as well as Wikipedia, Hacker News, the Cloudflare blog, and much of the Cloudflare dashboard.
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