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Playwright vs Steel

Steel scores higher on the AgentReady, 90/100 against 44/100. They differ on 20 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Playwright. A browser automation framework and testing tool that provides full-featured test runner with auto-waiting, assertions, tracing, and parallelism across Chromium, Firefox, and WebKit.

Steel. Steel is an open source browser API that lets you control fleets of browsers in the cloud.

Where Playwright is ahead

Playwright passes retry behavior documented, and Steel does not. That is operate, whether an agent can run against it in production and recover when a call fails.

Where Steel is ahead

Steel passes public docs discoverable, llms.txt published and llms-full.txt / full agent docs, and Playwright does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: structured api reference, openapi / spec quality, pricing understandable, request examples provided, response examples provided and errors and status codes documented. Playwright misses those.

And on adopt, self-service signup, no mandatory sales call, agent-compatible signup flow, programmatic credential creation, free trial or free allowance, fast time to first request and copyable quickstart. Playwright misses those.

Finally, on operate, structured, predictable output, machine-readable errors and observable execution. Playwright misses those.

What neither does

Both fail authentication documented, limits / constraints documented, idempotency support, rate-limit behavior predictable. If your agent needs any of those, you will be building it yourself either way.

Score, pillar by pillar

The AgentReady splits into four pillars, scored separately, because a product can be easy to find and still impossible to adopt.

Discover. Steel leads 100 to 73. Playwright misses public docs discoverable, llms.txt published, llms-full.txt / full agent docs; Steel misses nothing.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. Steel leads 85 to 15. Playwright misses structured api reference, openapi / spec quality, authentication documented, pricing understandable, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Steel misses authentication documented, limits / constraints documented.

Adopt. Steel leads 100 to 40. Playwright misses self-service signup, no mandatory sales call, agent-compatible signup flow, programmatic credential creation, free trial or free allowance, fast time to first request, copyable quickstart; Steel misses nothing.

Operate. Steel leads 76 to 47. Playwright misses structured, predictable output, machine-readable errors, idempotency support, rate-limit behavior predictable, observable execution; Steel misses retry behavior documented, idempotency support, rate-limit behavior predictable.

Pricing

Playwright does not publish a machine-readable starting price. Steel does not publish one and has a free tier.

Signal by signal

Which to pick

Steel clears more of the signals an agent needs, so it is the safer default for unattended use. Full profiles: Playwright and Steel. Alternatives to each: Playwright, Steel.

An agent can fetch this as data: POST /v1/compare {"slugs": ["playwright", "steel"]}