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APIs · head to head

KeystoneJS vs Swagger

KeystoneJS logo

KeystoneJS

APIs

Powerful Node.js headless CMS framework and API platform

From
Free
Rated
-
Full reviewWebsite
Swagger logo

Swagger

APIs

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

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: KeystoneJS database support is limited to PostgreSQL, MySQL and SQLite; Swagger specific pricing details not published on main website; requires accessing pricing page or contacting sales
  • They diverge on capability: KeystoneJS covers REST API, Swagger covers API Specification.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which KeystoneJS and Swagger actually diverge.

Attributes where KeystoneJS and Swagger differ
AttributeKeystoneJSSwagger
Pricing modelopen-sourcefreemium
PlatformsNode.js, Self-hostedWeb, CLI, Desktop
Founded20162011

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 KeystoneJS

  • REST API
  • GraphQL API
  • Admin interface
  • Node.js
  • Next.js
  • React
  • Databases
  • Node.js support

Only in Swagger

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

What people use each for

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

KeystoneJS

  • Headless CMS implementationnot Swagger
  • Content management systemsnot Swagger
  • Customizable API-driven applicationsnot Swagger

Swagger

  • API Developmentnot KeystoneJS
  • API Gatewaynot KeystoneJS
  • API Testingnot KeystoneJS
  • API Documentationnot KeystoneJS
  • Microservicesnot KeystoneJS

Where each one falls short

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

KeystoneJS

  • Database support is limited to PostgreSQL, MySQL and SQLite
  • Keystone 5 is a separate legacy product documented on a different site and is not covered by the Keystone 6 docs
  • Upgrading requires following a dedicated Migrate to 8.0.0 guide, so major versions are not drop-in
  • Free support is a community Slack; enterprise-grade consulting and support is a separate paid engagement with Thinkmill and no published price

Swagger

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

Pricing, plan by plan

KeystoneJS

Free
  • Open SourceFree
    • Full KeystoneJS
    • Community support

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

Which should you pick?

Choose KeystoneJS if

  • You need rest api.
  • You want to start without paying.
  • You work on Node.js, Self-hosted.
  • You also want graphql api.
KeystoneJS review

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

Questions people ask

Is KeystoneJS or Swagger better?
Neither clearly leads. KeystoneJS starts at Free and Swagger at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, KeystoneJS or Swagger?
KeystoneJS starts at Free and Swagger at Free.
Does KeystoneJS or Swagger run on more platforms?
KeystoneJS runs on Node.js, Self-hosted. Swagger runs on Web, CLI, Desktop.
Can I use KeystoneJS for free?
Both have a free tier, so you can try either at no cost before committing.
What is KeystoneJS best used for?
KeystoneJS is most often used for headless cms implementation, content management systems, customizable api-driven applications. Of those, headless cms implementation and content management systems are not what Swagger is typically brought in for.
What can KeystoneJS do that Swagger cannot?
KeystoneJS covers REST API, GraphQL API, Admin interface, Node.js. Swagger covers API Specification, Interactive Documentation, Code Generation, GitHub.

Answered from the vendors’ own pages

KeystoneJS: Is KeystoneJS free?

Yes, KeystoneJS is free and open source with no licensing fees. Core platform has no lock-in and is contributed to by 250+ developers.

Source
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
KeystoneJS: What are hosting costs for KeystoneJS?

KeystoneJS is self-hosted and deployment-agnostic. Hosting costs depend on your chosen deployment platform (Vercel, AWS, Heroku, etc.) and infrastructure, not KeystoneJS itself.

Source
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
KeystoneJS: Does KeystoneJS offer paid support?

Enterprise support with tailored options is available from Thinkmill, the company behind KeystoneJS. Pricing details available upon request.

Source
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