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Developer Tools · head to head

Swagger UI vs Yoti

Swagger UI logo

Swagger UI

Developer Tools

Interactive API documentation generated from OpenAPI specs

From
Free
Free plan
Yes
Full reviewWebsite
Yoti logo

Yoti

Cybersecurity

Reusable digital identity, facial age estimation and identity verification

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Only Swagger UI has a free tier, so it costs nothing to try first.
  • Each has a real cost: Swagger UI only as good as the specification: a thin OpenAPI file produces thin documentation; Yoti age estimation returns a probabilistic range rather than a verified date of birth, so it only works with a safety buffer above the legal threshold and cannot prove an exact age.
  • They diverge on capability: Swagger UI covers OpenAPI rendering, Yoti covers Facial age estimation.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Swagger UI and Yoti actually diverge.

Attributes where Swagger UI and Yoti differ
AttributeSwagger UIYoti
Starting priceFreeOn request
Pricing modelOpen source, no licence feequote
Free tierYesNo
PlatformsWeb, Self-hosted, DockerWeb, iOS, Android, API
CategoryDeveloper ToolsCybersecurity

Identical on both: 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 Swagger UI

  • OpenAPI rendering
  • Try it out
  • Schema display
  • Self-hostable

Only in Yoti

  • Facial age estimation
  • Reusable digital ID
  • Identity verification
  • UK right to work and rent
  • Digital ID for retail
  • Selective disclosure

What people use each for

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

Swagger UI

  • Publishing API documentation that stays in step with the specificationnot Yoti
  • Letting developers try endpoints before writing any client codenot Yoti
  • Internal API discovery across teamsnot Yoti

Yoti

  • A social platform meeting UK Online Safety Act age assurance duties without collecting identity documents from teenagersnot Swagger UI
  • A supermarket removing staff interventions at self-checkout for age-restricted purchasesnot Swagger UI
  • A UK employer running digital right-to-work checks under the certified trust framework rather than inspecting passportsnot Swagger UI
  • A gambling operator needing an age gate with high completion rates before the account funding stepnot Swagger UI

Where each one falls short

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

Swagger UI

  • Only as good as the specification: a thin OpenAPI file produces thin documentation
  • Default presentation is dated compared with modern documentation tools
  • Large specifications render slowly and become hard to navigate
  • Try it out against production needs care with authentication and CORS, and is often disabled as a result

Yoti

  • Age estimation returns a probabilistic range rather than a verified date of birth, so it only works with a safety buffer above the legal threshold and cannot prove an exact age.
  • Estimation accuracy varies by demographic and reported error margins widen at the age bands that matter most for eighteen-year thresholds, which pushes borderline users into a document fallback you still have to pay for.
  • Pricing is not published, so buyers cannot compare the cost of an estimation check against a document check without going through sales.
  • Regulatory acceptance of facial estimation differs by jurisdiction, so a method that satisfies Ofcom may not satisfy a regulator elsewhere and multi-market platforms need more than one approach.
  • The reusable digital identity app depends on consumer adoption, which is meaningful in the UK and thin elsewhere, limiting the reusability benefit outside its home market.

Pricing, plan by plan

Swagger UI

Free
  • Swagger UIFree
    • Full functionality
    • Commercial use permitted
    • Community support

Yoti

On request
  • Yoti Age and Identity Services$undefined/year
    • Per-check pricing quoted by volume and method
    • Age estimation, document verification and digital ID priced differently
    • Right to work and right to rent checks quoted separately

Which should you pick?

Choose Swagger UI if

  • You need openapi rendering.
  • You want to start without paying.
  • You work on Web, Self-hosted, Docker.
  • You also want try it out.
Swagger UI review

Choose Yoti if

  • You need facial age estimation.
  • You work on Web, iOS, Android, API.
  • You also want reusable digital id.
Yoti review

Questions people ask

Is Swagger UI or Yoti better?
Neither clearly leads. Swagger UI starts at Free and Yoti at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Swagger UI or Yoti?
Swagger UI has a free tier; the other does not. Paid plans start at Free for Swagger UI and On request for Yoti.
Does Swagger UI or Yoti run on more platforms?
Swagger UI runs on Web, Self-hosted, Docker. Yoti runs on Web, iOS, Android, API.
Can I use Swagger UI for free?
Yes. Swagger UI has a free tier, so you can try it without paying. Yoti starts at On request.
What is Swagger UI best used for?
Swagger UI is most often used for publishing api documentation that stays in step with the specification, letting developers try endpoints before writing any client code, internal api discovery across teams. Of those, publishing api documentation that stays in step with the specification and letting developers try endpoints before writing any client code are not what Yoti is typically brought in for.
What can Swagger UI do that Yoti cannot?
Swagger UI covers OpenAPI rendering, Try it out, Schema display, Self-hostable. Yoti covers Facial age estimation, Reusable digital ID, Identity verification, UK right to work and rent.

Answered from the vendors’ own pages

Swagger UI: Is Swagger UI free?

Yes, open source under the Apache 2.0 licence. SmartBear sells commercial SwaggerHub separately.

Yoti: Does age estimation store my face?

The image is used to produce an estimate and then deleted rather than retained, which is the specific property that makes it usable for age assurance on minors.

Swagger UI: What is the difference between Swagger and OpenAPI?

OpenAPI is the specification format; Swagger is the toolset around it, including Swagger UI. The specification was renamed from Swagger to OpenAPI in 2016.

Yoti: Is it accepted for UK Online Safety Act compliance?

Facial age estimation is one of the methods regulators have accepted as highly effective age assurance. Confirm the current position with your own counsel for your content category.

Swagger UI: Can Swagger UI make real API calls?

Yes, through its try-it-out control, though authentication and CORS configuration often mean it is disabled for production APIs.

Yoti: Can it prove someone is exactly 21?

No. It gives a range. If you need a precise age you need a document or database check, which Yoti also sells.

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