OpenAPI Generator vs Swagger Codegen

OpenAPI Generator9.3Visit Swagger Codegen9.1Visit

Higher score OpenAPI Generator #1 in Code Generators 9.3/10 Free plan Free plan✓ 5 of 5 features Visit site

vs

Swagger Codegen #2 in Code Generators 9.1/10 Open source ✓ 4 of 5 features Try Swagger Codegen

• OpenAPI Generator fits best

  Broad multi-language API generation

• Swagger Codegen fits best

  OpenAPI clients and server stubs

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature	OpenAPI Generator 9.3/10 Visit ↗	Swagger Codegen 9.1/10 Visit ↗
At a glance
Editor score	9.3	9.1
Ranking	#1 in Code Generators	#2 in Code Generators
Best for	Broad multi-language API generation	OpenAPI clients and server stubs
Pricing model	Free	Free
Starting price	Free plan	Open source
Free plan	✓ (best)	Not checked yet
Free trial	—	—
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Support	Community, Docs	Docs
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features OpenAPI Generator 5/5 · Swagger Codegen 4/5
Project scaffolding	✓	✓
Custom templates	✓	✓
Schema-to-code generation	✓	✓
CLI available	✓	✓
IDE plugins	✓ (best)	Not checked yet
Specs
Supported languages	ActionScript, Ada, Apex, Bash, C, C#, C++, Clojure, Crystal, Dart, Elixir, Elm, Eiffel, Erlang, F#, Go, Groovy, Haskell, Java, JavaScript, Julia, Kotlin, Lua, Nim, Objective-C, OCaml, Perl, PHP, PowerShell, Python, R, Ruby, Rust, Scala, Swift, TypeScript, Xojo	csharp, csharp-dotnet2, dart, go, java, javascript, jaxrs-cxf-client, kotlin-client, php, python, r, ruby, scala, swift3, swift4, swift5, typescript-angular, typescript-axios, typescript-fetch; server: aspnetcore, go-server, inflector, java-vertx, jaxrs-cxf, jaxrs-cxf-cdi, jaxrs-di, jaxrs-jersey, jaxrs-resteasy, jaxrs-resteasy-eap, jaxrs-spec, kotlin-server, micronaut, nodejs-server, python-flask, scala-akka-http-server, spring
Our review
Pros	Generates clients, server stubs, documentation, schemas, and configuration outputs Supports a wide range of languages, including Java, Python, Go, Rust, and TypeScript Fits Maven, Gradle, Bazel, GitHub, CI/CD, npm, Docker, and other workflows	Generates client SDKs in more than 40 languages Generates server stubs in more than 20 languages Supports custom templates, CLI, and online generation
Cons	Requires OpenAPI 2.0 or 3.x documents as the generation input Advanced output changes may require user-defined templates or custom generators Its broad generator range may require evaluation to choose the right output	Verified integrations are limited Separate 2.x and 3.x version lines add a version choice Does not provide AI features
Our verdict	OpenAPI Generator is an open-source code-generation toolkit for developers and API teams working from OpenAPI 2.0 and 3.x documents. It can produce API client libraries, server stubs, documentation, configuration files, and schemas. The… Read the review →	Swagger Codegen is an open-source tool for developers and teams implementing or consuming APIs defined with Swagger or OpenAPI specifications. It generates client SDKs, server stubs, and API documentation from OpenAPI descriptions, making… Read the review →

Strengths and trade-offs

• OpenAPI Generator — where it wins

  • Generates clients, server stubs, documentation, schemas, and configuration outputs
  • Supports a wide range of languages, including Java, Python, Go, Rust, and TypeScript
  • Fits Maven, Gradle, Bazel, GitHub, CI/CD, npm, Docker, and other workflows

  Where it doesn't

  • Requires OpenAPI 2.0 or 3.x documents as the generation input
  • Advanced output changes may require user-defined templates or custom generators
  • Its broad generator range may require evaluation to choose the right output

• Swagger Codegen — where it wins

  • Generates client SDKs in more than 40 languages
  • Generates server stubs in more than 20 languages
  • Supports custom templates, CLI, and online generation

  Where it doesn't

  • Verified integrations are limited
  • Separate 2.x and 3.x version lines add a version choice
  • Does not provide AI features

• OpenAPI Generator9.3/10 · Free plan

  A flexible open-source toolkit for multi-language API generation and workflow integration.

  Visit siteFull verdict →
• Swagger Codegen9.1/10 · Open source

  A broad OpenAPI code generator with strong language coverage and CLI access.

  Try Swagger CodegenFull verdict →