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Plausible vs PostHog

PostHog scores higher on the AgentReady, 67/100 against 48/100. They differ on 7 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Plausible. Plausible Analytics is a simple, privacy-friendly alternative to Google Analytics.

PostHog. PostHog is a product analytics platform that helps teams understand customer behavior, automatically diagnose problems, fix bugs, and generate pull requests.

Where PostHog is ahead

PostHog passes llms.txt published and mcp discoverable, and Plausible does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: limits / constraints documented. Plausible misses it.

And on adopt, official python sdk, cli available and mcp integration available. Plausible misses those.

Finally, on operate, agent compatibility verified. Plausible misses it.

What neither does

Both fail llms-full.txt / full agent docs, structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, programmatic credential creation, fast time to first request, copyable quickstart, structured, predictable output, machine-readable errors, 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. PostHog leads 93 to 73. Plausible misses llms.txt published, llms-full.txt / full agent docs, mcp discoverable; PostHog misses llms-full.txt / full agent docs.

Understand. PostHog leads 38 to 31. Plausible misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; PostHog misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented.

Adopt is whether an agent can get a key and make its first successful call without a human in the loop. PostHog leads 81 to 52. Plausible misses programmatic credential creation, fast time to first request, copyable quickstart, official python sdk, cli available, mcp integration available; PostHog misses programmatic credential creation, fast time to first request, copyable quickstart.

Operate. PostHog leads 56 to 35. Plausible misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; PostHog misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable.

Pricing

Plausible starts at $9/mo with no free tier. PostHog starts at $0.00005/event and has a free tier.

Signal by signal

Which to pick

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

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