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APIs · head to head

Swagger vs Yapily

Swagger logo

Swagger

APIs

API design and documentation platform for building, testing, and managing APIs

From
Free
Rated
-
Full reviewWebsite
Yapily logo

Yapily

APIs

Open banking API infrastructure for account data and pay-by-bank payments across Europe

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Swagger specific pricing details not published on main website; requires accessing pricing page or contacting sales; Yapily production pricing itself is not published; only the resulting typical merchant transaction cost is publicly known, so the underlying platform fee still requires a sales conversation.
  • They diverge on capability: Swagger covers API Specification, Yapily covers Unified open banking API.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Swagger and Yapily actually diverge.

Attributes where Swagger and Yapily differ
AttributeSwaggerYapily
Pricing modelfreemiumFree sandbox, pay-as-you-go production
PlatformsWeb, CLI, DesktopWeb, API
Founded2011Unknown

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 Swagger

  • API Specification
  • Interactive Documentation
  • Code Generation
  • GitHub
  • GitLab
  • Azure DevOps
  • Jira
  • Web support

Only in Yapily

  • Unified open banking API
  • Account information access
  • Payment initiation
  • Free sandbox
  • Multi-country bank coverage
  • Webhooks and reconciliation tooling

What people use each for

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

Swagger

  • API Developmentnot Yapily
  • API Gatewaynot Yapily
  • API Testingnot Yapily
  • API Documentationnot Yapily
  • Microservicesnot Yapily

Yapily

  • A merchant wanting a lower-cost payment method alongside card acceptancenot Swagger
  • A lending or budgeting product needing bank account data for affordability checksnot Swagger
  • A business wanting one API instead of separate integrations to each bank's own open banking standardnot Swagger
  • A company prototyping open banking features for free in sandbox before committing budgetnot Swagger

Where each one falls short

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

Swagger

  • Specific pricing details not published on main website; requires accessing pricing page or contacting sales

Yapily

  • Production pricing itself is not published; only the resulting typical merchant transaction cost is publicly known, so the underlying platform fee still requires a sales conversation.
  • Consumer adoption of pay-by-bank still lags card payments, so merchants offering it as a checkout option typically see it used as a secondary rather than primary payment method.
  • Coverage depends on the banks in each country maintaining reliable open banking APIs, and inconsistent bank-side reliability across markets is a known category-wide weakness, not unique to Yapily but not solved by it either.
  • As infrastructure for both account data and payments, a company only needing one of those two capabilities is still evaluating a broader platform than it may need.
  • Regulatory dependence on PSD2 and UK open banking rules means the underlying legal framework, not just Yapily's product, could shift and affect what is possible on the platform.

Pricing, plan by plan

Swagger

Free
  • FreeFree
    • OpenAPI specification
    • Swagger UI
    • API documentation
  • Professional$20/monthly
    • Advanced features
    • Team collaboration
    • API testing
  • Enterprise$undefined/monthly
    • Custom deployment
    • Advanced security
    • Dedicated support

Yapily

Free
  • SandboxFree
    • Free testing environment
    • UK and European bank connections for development
  • Production$undefined/month
    • Pay-as-you-go pricing, exact rates not published
    • Typical pay-by-bank cost of 0.1 to 0.5% or a flat 5 to 30 pence per transaction

Which should you pick?

Choose Swagger if

  • You need api specification.
  • You want to start without paying.
  • You work on Web, CLI, Desktop.
  • You also want interactive documentation.
Swagger review

Choose Yapily if

  • You need unified open banking api.
  • You want to start without paying.
  • You work on Web, API.
  • You also want account information access.
Yapily review

Questions people ask

Is Swagger or Yapily better?
Neither clearly leads. Swagger starts at Free and Yapily at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Swagger or Yapily?
Swagger starts at Free and Yapily at Free.
Does Swagger or Yapily run on more platforms?
Swagger runs on Web, CLI, Desktop. Yapily runs on Web, API.
Can I use Swagger for free?
Both have a free tier, so you can try either at no cost before committing.
What is Swagger best used for?
Swagger is most often used for api development, api gateway, api testing, api documentation. Of those, api development and api gateway are not what Yapily is typically brought in for.
What can Swagger do that Yapily cannot?
Swagger covers API Specification, Interactive Documentation, Code Generation, GitHub. Yapily covers Unified open banking API, Account information access, Payment initiation, Free sandbox.

Answered from the vendors’ own pages

Swagger: How much does Swagger cost?

Swagger does not publish specific pricing details on its main website. A free tier is available with a Start Free Trial option. For detailed pricing information, users must visit the dedicated pricing page or contact Swagger sales directly.

Source
Yapily: Is there a free way to try it?

Yes, sandbox access is free for development and testing.

Swagger: Does Swagger offer a free plan?

Yes, Swagger offers a free tier described as simple, useful, and easy to master for API client functionality. Exact feature details and limitations are not specified on the homepage.

Source
Yapily: How much cheaper is pay-by-bank than card payments?

Typically 0.1 to 0.5% of transaction value, or a flat 5 to 30 pence, against 1.5 to 3.5% for card scheme fees.

Yapily: Is production pricing published?

No, production access is pay-as-you-go but exact rates require a sales conversation.

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