Steel Review 2026

Open-source headless browser API for AI agents — managed Chromium sessions with stealth, captchas handling, file downloads, and per-session isolation.

Steel (steel.dev) is an open-source headless browser API designed specifically for AI agents that need to interact with the web. Instead of running Playwright or Puppeteer yourself, you call Steel's API to spin up an isolated Chromium session in the cloud (or self-host), drive it through standard Playwright/Puppeteer protocols, and tear it down when finished. Steel handles the operational pain that breaks DIY browser automation: stealth fingerprinting to avoid bot detection, proxy rotation, captcha handling, session reuse across multiple steps, persistent cookies, and structured screenshots/HTML extraction. For agent builders, Steel is the bridge between an LLM's plan and actually clicking buttons, filling forms, or scraping a logged-in site. The project is open source (GitHub: steel-dev/steel-browser) so teams concerned about sending traffic through a SaaS can self-host, while Steel Cloud is the managed offering with autoscaling and observability. The site lists pricing tiers though specific dollar amounts were not captured in plain text from the marketing pages and need verification. Steel is one of the most popular browser-automation primitives for agents, alongside Browserbase and Browser-use.