Compare

Capsolver vs Steel

Steel scores higher on the AgentReady, 90/100 against 56/100. They differ on 13 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Capsolver. AI-powered CAPTCHA solving service for automation and data workflows.

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

Where Steel is ahead

Steel passes mcp discoverable, and Capsolver does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: openapi / spec quality, request examples provided, response examples provided and errors and status codes documented. Capsolver misses those.

And on adopt, no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, cli available and mcp integration available. Capsolver misses those.

Finally, on operate, machine-readable errors and agent compatibility verified. Capsolver misses those.

What neither does

Both fail authentication documented, limits / constraints documented, retry behavior 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 87. Capsolver misses mcp discoverable; Steel misses nothing.

Understand. Steel leads 85 to 38. Capsolver misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Steel misses authentication documented, limits / constraints documented.

Adopt is whether an agent can get a key and make its first successful call without a human in the loop. Steel leads 100 to 50. Capsolver misses no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, cli available, mcp integration available; Steel misses nothing.

Operate. Steel leads 76 to 47. Capsolver misses machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Steel misses retry behavior documented, idempotency support, rate-limit behavior predictable.

Pricing

Capsolver starts at $0.4/1k images with no free tier. 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: Capsolver and Steel. Alternatives to each: Capsolver, Steel.

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