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Semrush vs SE Ranking

Semrush scores higher on the AgentReady, 46/100 against 37/100. They differ on 6 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Semrush. The leading platform to grow and measure brand visibility across every digital channel.

SE Ranking. Complete AI SEO platform for every challenge.

Where Semrush is ahead

Semrush passes search discoverable, llms.txt published and package / cli discoverable, and SE Ranking does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds adopt: agent-compatible signup flow and official typescript sdk. SE Ranking misses those.

Where SE Ranking is ahead

SE Ranking passes observable execution, and Semrush does not. That is operate, whether an agent can run against it in production and recover when a call fails.

What neither does

Both fail public docs discoverable, llms-full.txt / full agent docs, structured api reference, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, official python sdk, cli available, structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified. 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 is whether an agent can find the product at all without being told it exists. Semrush leads 80 to 53. Semrush misses public docs discoverable, llms-full.txt / full agent docs; SE Ranking misses search discoverable, public docs discoverable, llms.txt published, llms-full.txt / full agent docs, package / cli discoverable.

Understand. Both sit at 23/100 here. Semrush misses structured api reference, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; SE Ranking misses structured api reference, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented.

Adopt. Semrush leads 55 to 38. Semrush misses no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, official python sdk, cli available; SE Ranking misses no mandatory sales call, agent-compatible signup flow, programmatic credential creation, fast time to first request, copyable quickstart, official typescript sdk, official python sdk, cli available.

Operate. SE Ranking leads 35 to 24. Semrush misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution, agent compatibility verified; SE Ranking misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

Semrush does not publish a machine-readable starting price with no free tier. SE Ranking starts at $103.20/mo with no free tier.

Signal by signal

Which to pick

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

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