Kitesurf

Kitesurf

Cloudflare
+
+

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About

Kitesurf is an agent-first browser built specifically for AI agents and runs entirely on Cloudflare Workers instead of using Chromium. It is designed around what agents actually need: structured machine-readable content, scalable execution, low CPU and memory use, and safe interaction with untrusted web pages, rather than human-facing features such as tabs, themes, extensions, or pixel-perfect scrolling. Each page load is treated as untrusted input, every session starts fresh, and components are isolated with access only to the resources required for their function. Kitesurf uses native Rust compiled to WebAssembly where possible and is organized around an Engine, PageScript, and PageRenderer. The Engine exposes Chrome DevTools Protocol WebSocket and REST APIs and stores session state, while PageScript parses HTML and CSS and runs JavaScript and WebAssembly inside isolated Workers.

About

Phi Browser is an AI-native web browser designed to act as an intelligent, proactive companion that learns user behavior and assists with tasks directly within the browsing experience. Built on the Chromium engine, it functions as a full, fast, and stable browser while maintaining an open-source core for transparency and reliability. It introduces a personalized AI system based on a unified memory layer that remembers user activity, habits, and context, allowing it to anticipate needs and prepare actions without requiring repeated prompts. Rather than relying on a generic assistant, Phi offers a customizable, user-specific AI that adapts over time and proactively suggests or executes tasks such as navigating pages, summarizing content, or managing workflows. It emphasizes “less prompting, more doing,” meaning the browser can automate repetitive actions like clicking, typing, and navigating while maintaining accountability by showing what it has done.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

AI agent developers that need a scalable browser runtime optimized for programmatic web navigation, structured content extraction, and automated browsing

Audience

Developers, power users, and productivity-focused individuals who want a browser that automates tasks and adapts to their habits using AI

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

$20
Free Version
Free Trial

Pricing

Free
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Cloudflare
Founded: 2009
United States
blog.cloudflare.com/kitesurf/

Company Information

Phi Browser
Founded: 2025
United States
phibrowser.com

Alternatives

AssemblyScript

AssemblyScript

The AssemblyScript Project

Alternatives

Arc Browser

Arc Browser

The Browser Company
VibeSDK

VibeSDK

Cloudflare

Categories

Categories

Integrations

Chromium
CSS
Chrome DevTools
Cloudflare
HTML
JavaScript
WebAssembly

Integrations

Chromium
CSS
Chrome DevTools
Cloudflare
HTML
JavaScript
WebAssembly
Claim Kitesurf and update features and information
Claim Kitesurf and update features and information
Claim Phi Browser and update features and information
Claim Phi Browser and update features and information