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Documentation · head to head

Scalar vs Stoplight

Scalar logo

Scalar

Documentation

Open source API reference renderer and request client generated entirely from an OpenAPI document

From
Free
Rated
-
Full reviewWebsite
Stoplight logo

Stoplight

APIs

API design, documentation, and governance platform

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Scalar it documents only what an OpenAPI document can express, so guides, authentication walkthroughs and conceptual pages need a second tool and a second navigation.; Stoplight the free plan allows one project and one user
  • They diverge on capability: Scalar covers OpenAPI driven reference, Stoplight covers API Design.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Scalar and Stoplight actually diverge.

Attributes where Scalar and Stoplight differ
AttributeScalarStoplight
Pricing modelOpen source, no licence feesubscription
PlatformsWeb, macOS, Windows, LinuxWeb, Cloud
CategoryDocumentationAPIs
FoundedUnknown2014

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 Scalar

  • OpenAPI driven reference
  • Embedded API client
  • Generated code samples
  • Framework adapters
  • Themeable renderer
  • Self hostable
  • Spec validation

Only in Stoplight

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

What people use each for

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

Scalar

  • Replacing default Swagger UI on a public API without moving to a hosted documentation vendornot Stoplight
  • A framework that already emits an OpenAPI document and needs a reference page mounted on a routenot Stoplight
  • An internal API portal that must run inside a private network with no external callsnot Stoplight
  • A team that wants readers to make authenticated test calls without leaving the reference pagenot Stoplight

Stoplight

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

Where each one falls short

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

Scalar

  • It documents only what an OpenAPI document can express, so guides, authentication walkthroughs and conceptual pages need a second tool and a second navigation.
  • The output is only as good as the spec, so an API with thin descriptions and missing examples produces a thin reference and the tool cannot compensate.
  • Deep visual customisation goes beyond the theme variables quickly, and matching an existing brand often means overriding styles against internal class names that can change.
  • Running the embedded client against a production API invites readers to send real requests, which means rate limits, test accounts and CORS configuration become your problem.
  • The open source renderer and the hosted platform advance at different rates, so a feature seen in a demo is not necessarily in the package you self host.

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

Pricing, plan by plan

Scalar

Free
  • Open source rendererFree
    • MIT licence, no fee for the renderer
    • Embedded request client
    • Framework adapters

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

Which should you pick?

Choose Scalar if

  • You need openapi driven reference.
  • You want to start without paying.
  • You work on Web, macOS, Windows, Linux.
  • You also want embedded api client.
Scalar review

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

Questions people ask

Is Scalar or Stoplight better?
Neither clearly leads. Scalar starts at Free and Stoplight at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Scalar or Stoplight?
Scalar starts at Free and Stoplight at Free.
Does Scalar or Stoplight run on more platforms?
Scalar runs on Web, macOS, Windows, Linux. Stoplight runs on Web, Cloud.
Can I use Scalar for free?
Both have a free tier, so you can try either at no cost before committing.
What is Scalar best used for?
Scalar is most often used for replacing default swagger ui on a public api without moving to a hosted documentation vendor, a framework that already emits an openapi document and needs a reference page mounted on a route, an internal api portal that must run inside a private network with no external calls, a team that wants readers to make authenticated test calls without leaving the reference page. Of those, replacing default swagger ui on a public api without moving to a hosted documentation vendor and a framework that already emits an openapi document and needs a reference page mounted on a route are not what Stoplight is typically brought in for.
What can Scalar do that Stoplight cannot?
Scalar covers OpenAPI driven reference, Embedded API client, Generated code samples, Framework adapters. Stoplight covers API Design, API Documentation, Governance, GitHub.

Answered from the vendors’ own pages

Scalar: Can I use it without paying anything?

Yes. The renderer is open source and self hostable. The hosted platform is a separate paid product.

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
Scalar: Does it replace a full documentation site?

No. It covers API reference. Guides and concepts need a general documentation generator alongside it.

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
Scalar: Will my reference go out of date?

Only if your OpenAPI document does. The reference is generated, so there is no second copy to forget.

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
Scalar: Does the embedded client send real requests?

Yes, from the reader browser. Plan for CORS, rate limits and a sandbox environment before publishing.

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
Scalar: What if my API has no OpenAPI document?

Then this is the wrong tool. Producing an accurate spec is the prerequisite, not an optional step.

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