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Automation Integration · head to head

Inngest vs Zeplo

Inngest logo

Inngest

Automation Integration

Unbreakable Agents. Invisible Infra.

From
Free
Rated
-
Full reviewWebsite
Zeplo logo

Zeplo

APIs

Message queue as a URL prefix, adding retries and delays to any HTTP request

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Inngest hobby plans pause execution once free quota exhausted; upgrade required to continue; Zeplo zeplo sits directly in the execution path of your background work, so an outage at a very small vendor means your jobs do not run at all, and there is no published SLA below Enterprise.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Inngest and Zeplo actually diverge.

Attributes where Inngest and Zeplo differ
AttributeInngestZeplo
Pricing modelfreemiumPer month by request count
PlatformsWebWeb, Cloud
CategoryAutomation IntegrationAPIs

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Inngest

Nothing recorded that Zeplo does not also cover.

Only in Zeplo

  • URL prefix interface
  • Retries with backoff
  • Delayed delivery
  • Cron scheduling
  • Concurrency limits
  • Deduplication keys
  • Request logs
  • Team workspaces

What people use each for

The jobs each tool is most often brought in to do.

Inngest

  • Handling unpredictable LLM behavior with fine-grained error controlnot Zeplo
  • Retrying failed workflow steps independently without restartingnot Zeplo
  • Rate limiting per-tenant usage on shared infrastructurenot Zeplo
  • Processing thousands of webhooks per event with replay capabilitynot Zeplo
  • Persisting state across serverless function invocationsnot Zeplo

Zeplo

  • A Vercel or Cloudflare Workers application that needs retried background jobs without deploying a separate always-on workernot Inngest
  • A team that wants a webhook receiver protected by a concurrency limit so a burst does not overwhelm a downstream APInot Inngest
  • A small product needing cron jobs against HTTP endpoints without adding a scheduler to its infrastructurenot Inngest
  • A developer adding idempotent retries to an unreliable third-party API call with a one-line URL changenot Inngest

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Inngest

  • Hobby plans pause execution once free quota exhausted; upgrade required to continue
  • Pro plan overages carry tiered metering: additional concurrent steps at $25 per 25, span data at $3/GB, scores at $1.50 per 1K, events at $0.50 per 1M

Zeplo

  • Zeplo sits directly in the execution path of your background work, so an outage at a very small vendor means your jobs do not run at all, and there is no published SLA below Enterprise.
  • The free Developer tier includes only 500 requests a month and one team member, so it is a demonstration allowance rather than a usable free plan for anything real.
  • Overage on the Developer tier is 20 US dollars per 100,000 requests, two hundred times the marginal rate on the Company tier, so exceeding the free allowance without upgrading is expensive.
  • Team members cost 15 US dollars each beyond the plan allowance, which is an odd charge on an infrastructure product billed by request volume.
  • Log retention is 30 days on both published tiers, so anything requiring longer audit trails on job execution has to be logged separately.

Pricing, plan by plan

Inngest

Free
  • HobbyFree
    • 50k executions/month
    • 5 concurrent steps
    • 500 MB span data
  • Pro$99/month starting
    • 1M executions included, pay-as-you-go up to 20M
    • 100+ concurrent steps
    • 5 GB span data ingested
  • Enterprise$null/custom
    • customizable metrics
    • 90-day trace retention
    • SAML, RBAC, audit trails

Zeplo

Free
  • DeveloperFree
    • 500 requests a month included
    • $20 per additional 100,000 requests
    • 1 team member
  • Company$39/month
    • 1,000,000 requests a month included
    • $10 per additional million requests
    • Up to 3 team members
  • Enterprise$undefined/month
    • Volume discounts
    • Custom team size
    • Support with SLA

Which should you pick?

Choose Inngest if

  • You want to start without paying.
Inngest review

Choose Zeplo if

  • You need url prefix interface.
  • You want to start without paying.
  • You work on Web, Cloud.
  • You also want retries with backoff.
Zeplo review

Questions people ask

Is Inngest or Zeplo better?
Neither clearly leads. Inngest starts at Free and Zeplo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Inngest or Zeplo?
Inngest starts at Free and Zeplo at Free.
Does Inngest or Zeplo run on more platforms?
Inngest runs on Web. Zeplo runs on Web, Cloud.
Can I use Inngest for free?
Both have a free tier, so you can try either at no cost before committing.
What is Inngest best used for?
Inngest is most often used for handling unpredictable llm behavior with fine-grained error control, retrying failed workflow steps independently without restarting, rate limiting per-tenant usage on shared infrastructure, processing thousands of webhooks per event with replay capability. Of those, handling unpredictable llm behavior with fine-grained error control and retrying failed workflow steps independently without restarting are not what Zeplo is typically brought in for.
What can Inngest do that Zeplo cannot?
Zeplo covers URL prefix interface, Retries with backoff, Delayed delivery, Cron scheduling.

Answered from the vendors’ own pages

Inngest: How much does Inngest cost?

Inngest offers a free Hobby plan with 50k executions per month and up to 3 users. Pro plans start at $99 per month with 1M executions included and support for up to 15 users. Additional Pro users cost $10 each. Enterprise plans require custom pricing.

Source
Zeplo: How does Zeplo work?

You prefix your endpoint URL with zeplo.to and add query parameters for retries, delay, cron or concurrency. No SDK or broker is needed.

Inngest: Is there a free version of Inngest?

Yes, the Hobby plan is completely free and includes 50k executions per month, 5 concurrent steps, 500 MB span data ingested, 10K scores, 500k events ingested, and support for up to 3 users. Plan changes pause execution once the free quota is exhausted.

Source
Zeplo: What does it cost?

Free for 500 requests a month; 39 US dollars a month for a million requests, then 10 dollars per additional million.

Inngest: What are the overage costs on Inngest Pro?

Inngest Pro includes 1M executions with additional executions at $0.50 per 1M up to 20M. Span data overages cost $3 per GB, scores at $1.50 per 1K, and events at $0.50 per 1M. Additional concurrent steps cost $25 per 25 steps beyond the included 100+.

Source
Zeplo: Is it suitable for critical jobs?

It is a small vendor in your execution path with no published SLA below Enterprise, so weigh that against the convenience.

Zeplo: Does it work with serverless platforms?

Yes, that is its main use, covering Vercel, Cloudflare Workers, Netlify and similar environments that lack long-running workers.

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