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Testing · head to head

Insomnia vs Swagger/OpenAPI

Insomnia logo

Insomnia

Testing

REST and GraphQL API client for development and testing

From
Free
Rated
-
Full reviewWebsite
Swagger/OpenAPI logo

Swagger/OpenAPI

APIs

API specification and documentation framework using OpenAPI standard

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Insomnia git Sync on the free tier covers up to 3 users only; Swagger/OpenAPI the OpenAPI Specification itself is licensed under Apache License 2.0 and free to use; SwaggerHub is a separate paid tool built on top of it
  • They diverge on capability: Insomnia covers REST API Client, Swagger/OpenAPI covers OpenAPI Specification.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Insomnia and Swagger/OpenAPI actually diverge.

Attributes where Insomnia and Swagger/OpenAPI differ
AttributeInsomniaSwagger/OpenAPI
PlatformsWindows, MacOS, Linux, WebWeb, CLI, Desktop
CategoryTestingAPIs
Founded20102001

Identical on both: starting price (Free), pricing model (freemium), 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 Insomnia

  • REST API Client
  • GraphQL Support
  • gRPC Support
  • Slack
  • Windows support
  • MacOS support
  • Linux support

Only in Swagger/OpenAPI

  • OpenAPI Specification
  • Interactive Documentation
  • Code Generation
  • Jenkins
  • IDE plugins
  • CLI support
  • Desktop support

Both cover

  • GitHub
  • GitLab
  • Web support

What people use each for

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

Insomnia

  • Sending and debugging HTTP, GraphQL and gRPC requestsnot Swagger/OpenAPI
  • Storing collections in Git rather than a vendor cloudnot Swagger/OpenAPI
  • Mocking an API endpoint before it existsnot Swagger/OpenAPI
  • Running collections in CI with the Inso CLInot Swagger/OpenAPI
  • Environment management across staging and productionnot Swagger/OpenAPI

Swagger/OpenAPI

  • API Developmentnot Insomnia
  • API Gatewaynot Insomnia
  • API Testingnot Insomnia
  • API Documentationnot Insomnia
  • Microservicesnot Insomnia

Where each one falls short

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

Insomnia

  • Git Sync on the free tier covers up to 3 users only
  • Mock servers are capped at 1,000 requests a month on free, then $10 per 25,000
  • Role-based access control requires Pro at $12 per user per month
  • SSO, SCIM and vault integrations are Enterprise only at $45 per user per month
  • Working without an account is limited to the local-only Scratch Pad

Swagger/OpenAPI

  • The OpenAPI Specification itself is licensed under Apache License 2.0 and free to use; SwaggerHub is a separate paid tool built on top of it

Pricing, plan by plan

Insomnia

Free
  • EssentialsFree
    • unlimited Cloud/Local projects
    • up to 3 users with Git Sync
    • 1,000 mock server requests/month
  • Pro$12/user/month
    • unlimited users with Git Sync access
    • unlimited organizations
    • role-based access control
  • Enterprise$45/user/month
    • Kong Konnect integration
    • SSO (SAML/OIDC)
    • SCIM provisioning

Swagger/OpenAPI

Free
  • Open SourceFree
    • OpenAPI specification
    • Community tools
  • SwaggerHub FreeFree
    • Cloud editor
    • API mocking
    • API testing
  • SwaggerHub Pro$75/monthly
    • Team collaboration
    • Advanced mocking
    • Analytics

Which should you pick?

Choose Insomnia if

  • You need rest api client.
  • You want to start without paying.
  • You work on Windows, MacOS, Linux, Web.
  • You also want graphql support.
Insomnia review

Choose Swagger/OpenAPI if

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

Questions people ask

Is Insomnia or Swagger/OpenAPI better?
Neither clearly leads. Insomnia starts at Free and Swagger/OpenAPI at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Insomnia or Swagger/OpenAPI?
Insomnia starts at Free and Swagger/OpenAPI at Free.
Does Insomnia or Swagger/OpenAPI run on more platforms?
Insomnia runs on Windows, MacOS, Linux, Web. Swagger/OpenAPI runs on Web, CLI, Desktop.
Can I use Insomnia for free?
Both have a free tier, so you can try either at no cost before committing.
What is Insomnia best used for?
Insomnia is most often used for sending and debugging http, graphql and grpc requests, storing collections in git rather than a vendor cloud, mocking an api endpoint before it exists, running collections in ci with the inso cli. Of those, sending and debugging http, graphql and grpc requests and storing collections in git rather than a vendor cloud are not what Swagger/OpenAPI is typically brought in for.
What can Insomnia do that Swagger/OpenAPI cannot?
Insomnia covers REST API Client, GraphQL Support, gRPC Support, Slack. Swagger/OpenAPI covers OpenAPI Specification, Interactive Documentation, Code Generation, Jenkins. Both handle GitHub, GitLab, Web support.

Answered from the vendors’ own pages

Insomnia: How much does Insomnia cost?

Insomnia offers a free Essentials plan. Pro plans cost $12 per user per month with annual billing offering 17% savings. Enterprise plans cost $45 per user per month with support for up to 50 users self-serve; contact sales for larger teams.

Source
Swagger/OpenAPI: Is Swagger UI free to use?

Swagger UI is an open source tool with source code publicly available on GitHub at no cost. It is one of thousands of free open source projects in the Swagger ecosystem.

Source
Insomnia: Is there a free version of Insomnia?

Yes, the Essentials plan is free and includes unlimited Cloud and Local projects, Git Sync for up to 3 users, 1,000 mock server requests per month, Inso CLI, E2EE, custom linting, plugins, and AI features.

Source
Swagger/OpenAPI: What commercial Swagger products are available beyond the open source tools?

Swagger offers Swagger for Teams for streamlined API workflow with interactive editors and hosted documentation, and Swagger Enterprise for organizations needing secure on-premise or cloud-based environments. Specific pricing requires contacting sales.

Source
Insomnia: What mock server request limits apply to Insomnia plans?

Essentials includes 1,000 mock server requests per month. Pro includes 10,000 requests per month. Enterprise includes unlimited mock server requests. Additional mock server requests beyond plan allowances cost $10 per 25,000 requests.

Source
Swagger/OpenAPI: Are there commercial versions that build on the open source Swagger tools?

Yes, commercial Swagger products integrate the core functionality of Swagger open source tools (Editor, UI, and Codegen) with advanced capabilities for team collaboration, standards enforcement, and enterprise features.

Source
Swagger/OpenAPI: Is there a trial available for Swagger commercial products?

A Start Trial call-to-action is available on the Swagger website, but specific trial duration and terms are not disclosed on the product pages.

Source
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