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APIs · head to head

Lithic vs Swagger UI

Lithic logo

Lithic

APIs

API-first card issuing platform with direct Visa, Mastercard and Amex network connections

From
On request
Rated
-
Full reviewWebsite
Swagger UI logo

Swagger UI

Developer Tools

Interactive API documentation generated from OpenAPI specs

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Swagger UI has a free tier, so it costs nothing to try first.
  • Each has a real cost: Lithic pricing is entirely undisclosed, so a company cannot compare total cost against Marqeta, Galileo or Highnote without a sales conversation.; Swagger UI only as good as the specification: a thin OpenAPI file produces thin documentation
  • They diverge on capability: Lithic covers Direct network connections, Swagger UI covers OpenAPI rendering.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

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

Attributes where Lithic and Swagger UI differ
AttributeLithicSwagger UI
Starting priceOn requestFree
Pricing modelquoteOpen source, no licence fee
Free tierNoYes
PlatformsWeb, APIWeb, Self-hosted, Docker
CategoryAPIsDeveloper Tools

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 Lithic

  • Direct network connections
  • Processor Client mode
  • Lithic Program Management
  • Card lifecycle APIs
  • Sandbox environment
  • Real-time authorization controls

Only in Swagger UI

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

What people use each for

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

Lithic

  • A fintech wanting direct Visa or Mastercard network access rather than routing through a third-party processornot Swagger UI
  • A company that already holds its own issuing licence and wants API access without full programme managementnot Swagger UI
  • A neobank or expense platform wanting Lithic to manage bank and network relationships end to endnot Swagger UI
  • A product team prototyping a card programme in sandbox before committing to a launchnot Swagger UI

Swagger UI

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

Where each one falls short

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

Lithic

  • Pricing is entirely undisclosed, so a company cannot compare total cost against Marqeta, Galileo or Highnote without a sales conversation.
  • Choosing Processor Client mode still leaves the company responsible for holding its own issuing licence and managing the regulatory relationship, which is a substantial undertaking many teams underestimate.
  • As with any card infrastructure provider, an outage or network issue at Lithic becomes a direct outage for every card programme built on it, and a customer has limited visibility into root cause during an incident.
  • Building a card programme on API infrastructure requires real engineering investment; it is not a plug-and-play product for a non-technical team.
  • Switching card infrastructure providers after launch is a major undertaking involving card reissuance and programme migration, so the initial choice carries lasting lock-in.

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

Pricing, plan by plan

Lithic

On request
  • Lithic$undefined/year
    • Volume and interchange-based pricing, not published
    • Separate Processor Client and Program Management pricing tracks
    • Custom quote required via sales

Swagger UI

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

Which should you pick?

Choose Lithic if

  • You need direct network connections.
  • You work on Web, API.
  • You also want processor client mode.
Lithic review

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

Questions people ask

Is Lithic or Swagger UI better?
Neither clearly leads. Lithic starts at On request and Swagger UI at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Lithic or Swagger UI?
Swagger UI has a free tier; the other does not. Paid plans start at On request for Lithic and Free for Swagger UI.
Does Lithic or Swagger UI run on more platforms?
Lithic runs on Web, API. Swagger UI runs on Web, Self-hosted, Docker.
Can I use Swagger UI for free?
Yes. Swagger UI has a free tier, so you can try it without paying. Lithic starts at On request.
What is Lithic best used for?
Lithic is most often used for a fintech wanting direct visa or mastercard network access rather than routing through a third-party processor, a company that already holds its own issuing licence and wants api access without full programme management, a neobank or expense platform wanting lithic to manage bank and network relationships end to end, a product team prototyping a card programme in sandbox before committing to a launch. Of those, a fintech wanting direct visa or mastercard network access rather than routing through a third-party processor and a company that already holds its own issuing licence and wants api access without full programme management are not what Swagger UI is typically brought in for.
What can Lithic do that Swagger UI cannot?
Lithic covers Direct network connections, Processor Client mode, Lithic Program Management, Card lifecycle APIs. Swagger UI covers OpenAPI rendering, Try it out, Schema display, Self-hostable.

Answered from the vendors’ own pages

Lithic: Does Lithic publish pricing?

No, pricing is volume-based and requires a sales conversation.

Swagger UI: Is Swagger UI free?

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

Lithic: What is the difference between Processor Client and Program Management?

Processor Client suits companies with their own issuing licence and bank relationships; Program Management is for companies wanting Lithic to coordinate those relationships on their behalf.

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.

Lithic: Which networks does it connect to?

Visa, Mastercard and American Express directly.

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.

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