Pick Inngest if
teams who will stay on Free $0 (50k executions, no card) while they wrap a first agent, then buy Pro at $99/month when they need 1M executions and 7-day traces.
Read the Inngest pageInngest vs Prefect
Our take
Pick Inngest if teams who will stay on Free $0 (50k executions, no card) while they wrap a first agent, then buy Pro at $99/month when they need 1M executions and 7-day traces. Pick Prefect if data / ML teams who will self-host OSS at $0, or stay on Cloud Hobby at $0 (2 users, 5 deployments, 500 min Serverless, 7-day retention) until they need Starter at $100/month or Team at $100/user/month for more deployments,
Inngest
durable event runtime for functions and
Best for
Inngest Event-driven durable functions you start at $0
Prefect Runs you start at $0
Free plan
Inngest $0 · /month. No card. 5 seats. 50k executions/mo. 5 concurrent steps. 3 workers. 500k events. 100k queue depth. 50 realtime connections. 256 KiB event size. 500 MB span data. 10K scores. 24-hour traces. When the free quota is gone, execution pauses until you upgrade
Prefect $0 · apache 2.0. Schema.org Offer on the open-source page: price 0 USD. Run a Prefect server on your infra (self-host)
Lowest paid
Inngest Sandbox compute $0.000011
Prefect Starter (Cloud) $100/mo
Next step up
Inngest Pro execution overage $0.000050
Prefect
Coding agent
Inngest Agent Evals
Prefect
Runs where
Inngest
Prefect Local; you host it
Watch out
Inngest Free pauses when 50k executions are gone
Prefect Hobby is 5 deployments, 2 users, and 7-day run retention
Last checked
Inngest 2026-10-22 · inngest.com/pricing
Prefect 2026-10-22 · prefect.io/pricing
Which one, then?
Pick Prefect if
data / ML teams who will self-host OSS at $0, or stay on Cloud Hobby at $0 (2 users, 5 deployments, 500 min Serverless, 7-day retention) until they need Starter at $100/month or Team at $100/user/month for more deployments, service accounts, and a 24-hour audit log.
Read the Prefect page