Softwr

APIs · head to head

Stoplight vs Svix

Stoplight logo

Stoplight

APIs

API design, documentation, and governance platform

From
Free
Rated
-
Full reviewWebsite
Svix logo

Svix

APIs

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

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Stoplight the free plan allows one project and one user; 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.
  • They diverge on capability: Stoplight covers API Design, Svix covers Automatic retries.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Stoplight and Svix actually diverge.

Attributes where Stoplight and Svix differ
AttributeStoplightSvix
Pricing modelsubscriptionPer month by message count
PlatformsWeb, CloudWeb, Cloud, Docker
Founded2014Unknown

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 Stoplight

  • API Design
  • API Documentation
  • Governance
  • GitHub
  • GitLab
  • Jenkins
  • Azure DevOps
  • Web support

Only in Svix

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

What people use each for

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

Stoplight

  • API design and documentationnot Svix
  • API governance and standardsnot Svix
  • Team collaboration on API developmentnot Svix
  • API mocking and testingnot Svix

Svix

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

Where each one falls short

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

Stoplight

  • The free plan allows one project and one user
  • Private projects, multi branch support and custom domains start at the Startup plan, $113 a month billed annually
  • SSO and shared style guides are Pro Team only, at $362 a month billed annually
  • Seats beyond each plan's allowance are $11 to $27 each per month depending on tier and billing period

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.

Pricing, plan by plan

Stoplight

Free
  • FreeFree
    • 1 project
    • 1 user
    • Basic API design and documentation features
  • Basic$56/month
    • Annual: $44/user/year
    • 3 included users; $14 per additional user (monthly)
    • Unlimited projects
  • Startup$147/month
    • Annual: $113/user/year
    • 8 included users; $14 per additional user (monthly)
    • Private projects
  • Pro Team$453/month
    • Annual: $362/user/year
    • 15 included users; $27 per additional user (monthly)
    • Up to 20 teams

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

Which should you pick?

Choose Stoplight if

  • You need api design.
  • You want to start without paying.
  • You work on Web, Cloud.
  • You also want api documentation.
Stoplight review

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

Questions people ask

Is Stoplight or Svix better?
Neither clearly leads. Stoplight starts at Free and Svix at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Stoplight or Svix?
Stoplight starts at Free and Svix at Free.
Does Stoplight or Svix run on more platforms?
Stoplight runs on Web, Cloud. Svix runs on Web, Cloud, Docker.
Can I use Stoplight for free?
Both have a free tier, so you can try either at no cost before committing.
What is Stoplight best used for?
Stoplight is most often used for api design and documentation, api governance and standards, team collaboration on api development, api mocking and testing. Of those, api design and documentation and api governance and standards are not what Svix is typically brought in for.
What can Stoplight do that Svix cannot?
Stoplight covers API Design, API Documentation, Governance, GitHub. Svix covers Automatic retries, Payload signing, Consumer portal, Event types and filtering.

Answered from the vendors’ own pages

Stoplight: How much does Stoplight cost?

Stoplight starts with a free plan (1 project, 1 user), then Basic at $56/month per user (or $44/year), Startup at $147/month per user (or $113/year), Pro Team at $453/month per user (or $362/year), and Enterprise at custom pricing.

Source
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.

Stoplight: How many included users are in each Stoplight plan?

Basic includes 3 users, Startup includes 8 users, and Pro Team includes 15 users. Additional users beyond the included count cost $14/month for Basic and Startup, or $27/month for Pro Team.

Source
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.

Stoplight: Does Stoplight offer a free trial?

Yes, all paid Stoplight plans include a 14-day free trial. The free plan has no trial period as it is always available.

Source
Svix: What counts as a message?

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

Stoplight: Does Stoplight's free plan have limitations?

Yes, the free plan includes only 1 project and 1 user. Users viewing public documentation anonymously are not counted toward the 1-user limit.

Source
Svix: Does it handle inbound webhooks?

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

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