Softwr

APIs · head to head

Svix vs Zeplo

Svix logo

Svix

APIs

Outbound webhook sending as a service, with retries, signing and a customer-facing portal

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: Svix the Professional tier at 490 US dollars a month includes the same 50,000 messages as the free tier, so the upgrade buys SLA, throughput and retention rather than volume, which is a jarring step for a growing product.; 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.
  • They diverge on capability: Svix covers Automatic retries, Zeplo covers URL prefix interface.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Svix and Zeplo actually diverge.

Attributes where Svix and Zeplo differ
AttributeSvixZeplo
Pricing modelPer month by message countPer month by request count
PlatformsWeb, Cloud, DockerWeb, Cloud

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

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 Svix

  • Automatic retries
  • Payload signing
  • Consumer portal
  • Event types and filtering
  • Delivery logs and replay
  • Rate limiting
  • Static source IPs
  • Language SDKs

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.

Svix

  • A SaaS company adding webhooks to its API that does not want to build retry, signing and a customer debugging UI from scratchnot Zeplo
  • A payments or fintech product whose customers need signature verification libraries in several languages they did not writenot Zeplo
  • An engineering team drowning in support tickets from customers whose endpoints silently failed and who need self-service delivery logsnot Zeplo
  • A platform with a small number of very slow customer endpoints that must not delay deliveries to everyone elsenot Zeplo

Zeplo

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

Where each one falls short

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

Svix

  • The Professional tier at 490 US dollars a month includes the same 50,000 messages as the free tier, so the upgrade buys SLA, throughput and retention rather than volume, which is a jarring step for a growing product.
  • Only attempted messages count toward usage, but a customer with many subscribed endpoints multiplies a single event into many billable messages, and forecasting that fan-out before launch is difficult.
  • The open source server is MIT licensed but trails the hosted product in features, so self-hosting is a fallback position rather than a genuinely equivalent option.
  • Routing outbound customer traffic through a third party puts a vendor in the delivery path for events your customers may treat as contractual, which some security reviews will not accept.
  • Payload retention is 30 days on the free tier and 90 on Professional, so anyone needing longer delivery history for audit must pay for Enterprise or log independently.

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

Svix

Free
  • FreeFree
    • 50,000 messages a month included
    • Overage at $0.0001 per message
    • 99.9% uptime SLA
  • Professional$490/month
    • 50,000 messages included, same as free
    • 99.99% uptime SLA
    • 800 messages per second
  • Enterprise$undefined/year
    • Custom volume and rate limits
    • 99.999% uptime SLA
    • Custom retention

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 Svix if

  • You need automatic retries.
  • You want to start without paying.
  • You work on Web, Cloud, Docker.
  • You also want payload signing.
Svix 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 Svix or Zeplo better?
Neither clearly leads. Svix 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, Svix or Zeplo?
Svix starts at Free and Zeplo at Free.
Does Svix or Zeplo run on more platforms?
Svix runs on Web, Cloud, Docker. Zeplo runs on Web, Cloud.
Can I use Svix for free?
Both have a free tier, so you can try either at no cost before committing.
What is Svix best used for?
Svix is most often used for a saas company adding webhooks to its api that does not want to build retry, signing and a customer debugging ui from scratch, a payments or fintech product whose customers need signature verification libraries in several languages they did not write, an engineering team drowning in support tickets from customers whose endpoints silently failed and who need self-service delivery logs, a platform with a small number of very slow customer endpoints that must not delay deliveries to everyone else. Of those, a saas company adding webhooks to its api that does not want to build retry, signing and a customer debugging ui from scratch and a payments or fintech product whose customers need signature verification libraries in several languages they did not write are not what Zeplo is typically brought in for.
What can Svix do that Zeplo cannot?
Svix covers Automatic retries, Payload signing, Consumer portal, Event types and filtering. Zeplo covers URL prefix interface, Retries with backoff, Delayed delivery, Cron scheduling.

Answered from the vendors’ own pages

Svix: How much does Svix cost?

Free up to 50,000 messages a month; Professional starts at 490 US dollars a month with the same included volume but better SLA and throughput.

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.

Svix: Can I self-host it?

Yes, there is an MIT licensed server, but it lags the hosted service in features and has no SLA.

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.

Svix: What counts as a message?

Attempted or transformed deliveries. Retries and messages filtered out because no endpoint subscribed are not charged.

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.

Svix: Does it handle inbound webhooks?

Its focus is outbound sending on behalf of API providers, not receiving webhooks from third parties.

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.

Share

Related pages

More on Svix

More on Zeplo

Keep looking

Other head to heads