AI Tool

steel-browser Review

steel-browser is an open-source browser API designed for AI agents and applications, providing a cloud-native sandbox for web automation without infrastructure management.

shipped Jul 22, 2026freemium

Domain rating51Monthly visits409/mo

steel-browser - AI tool for steel browser. Professional illustration showing core functionality and features.

Why it matters

1Open-source browser API with Python and Node.js SDKs.

2Achieves sub-second session startup times, averaging 0.89s.

3Offers anti-bot protection, auto CAPTCHA solving, and proxy rotation.

4Supports up to 24-hour long sessions and manages browser context.

Specs

API Docs

View Documentation →

GitHub

View Repository →

API Available

Yes, public API

overview

What is steel-browser?

steel-browser is an Open Source Browser (technology) API tool developed by Steel.dev that enables AI agent developers and automation engineers to automate web interactions without managing browser infrastructure. It provides a cloud-native browser sandbox with advanced anti-detection measures and scalable session handling for AI Agents (technology) and Apps (technology).

Steel.dev enables developers to programmatically control fleets of Chrome browsers in the cloud via a REST API or Python/Node.js SDKs. Its core functionality revolves around providing scalable, persistent browser Sessions (technology) equipped with advanced anti-detection capabilities. The platform abstracts away complexities such as browser management, anti-detection measures, and scalable session handling, allowing developers to focus on building the core logic of their AI applications. Notable features include a custom Chromium fork called Stealth Browser, dedicated IPs for consistent agent identity, and native Rust and Go SDKs released during 'Launch Week v3' in June 2026.

features

Key Features of steel-browser

steel-browser provides a comprehensive set of features designed to streamline web automation for AI agents and applications, focusing on reliability, performance, and ease of integration. These capabilities include advanced anti-bot measures and flexible session management.

Open Source Browser API for transparent and inspectable runtime.
Batteries-included browser sandbox for simplified web automation.
Anti-bot protection, including auto CAPTCHA solving and proxy rotation.
Quick-start sessions, averaging 0.89s startup time (p95 of 1.09s).
Support for up to 24-hour long Sessions (technology) with context management (cookies, local storage).
1-line code change for migration from Puppeteer, Playwright, or Selenium scripts.
World-class Observability (Dashboard) with a Session Viewer.
Dedicated IPs for production agents, ensuring stable network origin.
Stealth Browser, a custom Chromium fork optimized for agent workloads.
Native Rust and Go SDKs for expanded language support.

use cases

Who Should Use steel-browser?

steel-browser is primarily designed for developers and engineers who require robust, scalable, and reliable browser automation for AI-driven applications and data extraction tasks. Its architecture is optimized for scenarios where traditional web scraping or automation tools fall short due to anti-bot measures or infrastructure complexities.

AI agent developers: For building and managing autonomous web browsing agents that interact with dynamic web environments.
Developers building AI applications: For integrating web interaction capabilities into applications reliant on real-time web data.
Automation engineers: For running browser automations in the cloud, including large-scale web scraping and data extraction.
Foundational model trainers: For improving retrieval quality in RAG pipelines by feeding optimized content into AI models.
RPA Software developers: For automating complex business processes that involve web interfaces, such as sales automation or QA testing.

how to use

How to Use steel-browser

To begin using steel-browser, developers can integrate its API or SDKs into their existing projects. The platform supports popular browser automation libraries like Puppeteer, Playwright, and Selenium, allowing for a straightforward transition.

1Sign up for a steel-browser account on steel.dev to access API keys.
2Install the Python or Node.js SDK in your development environment.
3Modify existing Puppeteer, Playwright, or Selenium scripts with a 1-line change to direct browser commands to the steel-browser cloud.
4Utilize the API to launch browser sessions, navigate web pages, interact with elements, and extract data.
5Leverage features like anti-bot protection and session persistence for complex or long-running automation tasks.
6Monitor session activity and performance using the Session Viewer in the Dashboard (other).

pricing

steel-browser Pricing & Plans

steel-browser operates on a freemium model with tiered plans designed to accommodate various usage levels, from individual developers to large enterprises. All plans include usage-based billing for browser sessions.

Launch: $0 per month + usage. Includes $30 of one-time credits, email support, and community support. Concurrency limit is 5 concurrent sessions.
Scale: $250 per month + usage. Includes $100 of monthly credits, a dedicated Slack channel, Enterprise SSO, and HIPA-ready BAA. Concurrency limit is 10 concurrent sessions.
Enterprise: Custom per month + usage. Offers custom free usage credits, support for 1,000+ concurrent browser sessions, access to Stealth Browser, and reserve browser pools. Concurrency limits are custom.
Note: Concurrency limits for all plans were doubled as of October 17, 2025.

Pros

+Open-source runtime provides transparency and self-hosting flexibility.
+Achieves sub-second session startup times (0.89s average), crucial for high-churn AI agents.
+Built-in anti-bot features, including CAPTCHA solving and proxy rotation, enhance reliability.
+Designed specifically for AI agents, offering token-optimized content extraction for LLMs.
+Simplifies browser automation with 1-line migration from Puppeteer/Playwright/Selenium scripts.
+Offers dedicated IPs for consistent agent identity across runs.

Cons

−Potential for IP addresses to be banned by major players if cloud service usage is high, despite large IP pools.
−May have lower 'feature completeness' compared to some enterprise-grade alternatives for highly complex, multi-step tasks.
−Concurrency limits vary by plan, potentially restricting large-scale parallel operations on lower tiers (e.g., 5 concurrent sessions on 'Launch').

Policies

Pricing Page

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Similar Tools

steel-browser vs Competitors

steel-browser differentiates itself in the market by offering an open-source, developer-first browser API with a strong emphasis on speed, anti-detection capabilities, and an AI-centric design. It competes with both fully managed cloud services and other open-source browser solutions.

Cloudflare Browser RenderingOn Stork

Leverages Cloudflare's global network to provide on-demand, low cold-start headless browsers, optimized for AI agents and web scraping at scale.

Unlike Steel Browser which offers self-hosting, Cloudflare Browser Rendering is a fully managed cloud service, abstracting all infrastructure and providing a global pool of browsers with REST APIs and Playwright/Puppeteer support.

Agent-Browser (Vercel Labs)↗

An open-source CLI tool built in Rust, specifically designed for AI agents with a focus on token efficiency through 'Snapshot + Refs' to minimize context window usage.

While Steel Browser is an open-source API, Agent-Browser is an open-source CLI tool that prioritizes minimizing token consumption for AI agents, offering a different interaction model (CLI commands vs. API calls) and a strong focus on context efficiency.

Lightpanda↗

An open-source headless browser built from scratch in Zig, optimized for extreme performance and minimal memory footprint for AI agents and automation, without relying on Chromium forks.

Lightpanda is an open-source headless browser like Steel Browser, but it differentiates by being built from scratch in Zig for superior performance and memory efficiency, aiming to be a lighter alternative to Chromium-based solutions.

BrowserbaseOn Stork

Provides managed cloud browsers and web data APIs specifically designed for AI agents, abstracting infrastructure complexities and offering serverless infrastructure.

Similar to Steel Browser's managed cloud offering, Browserbase focuses on providing a fully managed, serverless cloud browser infrastructure for AI agents, handling all browser instances and web data APIs, contrasting with Steel's emphasis on self-hosting options.