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Inngest vs Plain

Inngest scores higher on the AgentReady, 61/100 against 46/100. They differ on 12 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Inngest. Inngest is an event-driven durable execution platform that allows developers to run fast, reliable code on any platform without managing queues, infrastructure, or state.

Plain. Plain is AI support infrastructure that enables B2B teams to build anything – no-code or all-code.

Where Inngest is ahead

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

It also holds understand: pricing understandable and limits / constraints documented. Plain misses those.

And on adopt, self-service signup, free trial or free allowance, fast time to first request, copyable quickstart, cli available and mcp integration available. Plain misses those.

Finally, on operate, idempotency support. Plain misses it.

Where Plain is ahead

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

It also holds operate: structured, predictable output. Inngest misses it.

What neither does

Both fail openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, no mandatory sales call, agent-compatible signup flow, programmatic credential creation, machine-readable errors, retry behavior documented, 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. Both sit at 87/100 here. Inngest misses search discoverable; Plain misses mcp discoverable.

Understand. Inngest leads 46 to 31. Inngest misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented; Plain misses openapi / spec quality, authentication documented, pricing understandable, 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. Inngest leads 70 to 20. Inngest misses no mandatory sales call, agent-compatible signup flow, programmatic credential creation; Plain 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, cli available, mcp integration available.

Operate. Plain leads 47 to 41. Inngest misses structured, predictable output, machine-readable errors, retry behavior documented, rate-limit behavior predictable, agent compatibility verified; Plain misses machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

Inngest starts at $99/mo and has a free tier. Plain does not publish one.

Signal by signal

Which to pick

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

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