Insomnia vs Swagger/OpenAPI

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.

What people use each for

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

Where each one falls short

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

Pricing, plan by plan

Which should you pick?

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.