Compare

FastCron vs Inngest

Inngest scores higher on the AgentReady, 61/100 against 52/100. 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

FastCron. FastCron is a simple online cronjob service to help you schedule and run tasks automatically.

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.

Where FastCron is ahead

FastCron 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 understand: authentication documented. Inngest misses it.

And on adopt, no mandatory sales call and agent-compatible signup flow. Inngest misses those.

Where Inngest is ahead

Inngest passes clear canonical domain, llms.txt published, llms-full.txt / full agent docs and mcp discoverable, and FastCron 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. FastCron misses it.

And on adopt, official typescript sdk, cli available and mcp integration available. FastCron misses those.

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

What neither does

Both fail 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, 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. Inngest leads 87 to 67. FastCron misses clear canonical domain, llms.txt published, llms-full.txt / full agent docs, mcp discoverable; Inngest misses search discoverable.

Understand. Both sit at 46/100 here. FastCron misses openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Inngest misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented.

Adopt. Inngest leads 70 to 60. FastCron misses programmatic credential creation, official typescript sdk, cli available, mcp integration available; Inngest misses no mandatory sales call, agent-compatible signup flow, programmatic credential creation.

Operate. Inngest leads 41 to 35. FastCron misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Inngest misses structured, predictable output, machine-readable errors, retry behavior documented, rate-limit behavior predictable, agent compatibility verified.

Pricing

FastCron starts at $6/month and has a free tier. Inngest starts at $99/mo and has a free tier.

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: FastCron and Inngest. Alternatives to each: FastCron, Inngest.

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