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PostHog vs Statsig

PostHog scores higher on the AgentReady, 67/100 against 51/100. They differ on 10 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

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

Statsig. Statsig is a unified platform for feature flags, A/B testing, and product analytics that helps teams ship, measure, and learn.

Where PostHog is ahead

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

It also holds understand: authentication documented and limits / constraints documented. Statsig misses those.

And on adopt, no mandatory sales call, cli available and mcp integration available. Statsig misses those.

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

Where Statsig is ahead

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

It also holds adopt: fast time to first request and copyable quickstart. PostHog misses those.

What neither does

Both fail structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, programmatic credential creation, 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 87. PostHog misses llms-full.txt / full agent docs; Statsig misses mcp discoverable.

Understand. PostHog leads 38 to 23. PostHog misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented; Statsig misses structured api reference, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes 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. PostHog leads 81 to 60. PostHog misses programmatic credential creation, fast time to first request, copyable quickstart; Statsig misses no mandatory sales call, programmatic credential creation, cli available, mcp integration available.

Operate is whether an agent can run against it in production and recover when a call fails. PostHog leads 56 to 35. PostHog misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable; Statsig misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

PostHog starts at $0.00005/event and has a free tier. Statsig does not publish one 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: PostHog and Statsig. Alternatives to each: PostHog, Statsig.

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