head to head · open source
openapi-generator vs openapi-typescript
openapi-generator has 26,748 GitHub stars, 7,675 forks, 5,751 open issues and last shipped yesterday. openapi-typescript has 8,369 stars, 665 forks, 300 open issues and last shipped 2 days ago. openapi-generator leads on adoption by 220% (26,748 vs 8,369 stars). openapi-generator is written in Java under Apache-2.0; openapi-typescript is written in TypeScript under MIT. openapi-generator has attracted 29% as many forks as stars, openapi-typescript 8%. openapi-generator was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (openapi, openapi3), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| openapi-generator | openapi-typescript | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 8.4K |
| License | Apache-2.0 | MIT |
| Written in | Java | TypeScript |
| Last push | 2026-09-17 | 2026-09-16 |
| Forks | ⑂ 7.7K | ⑂ 665 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick openapi-generator if
- You weight community size — 27K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Java
- You value the larger contributor base for long-term maintenance
pick openapi-typescript if
- You want the openapi-typescript feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and openapi-typescript fits your workflow better
About openapi-generator
OpenAPI Generator is an Apache 2.0 licensed Java tool that generates API client libraries, server stubs, documentation, and configuration automatically from an OpenAPI Specification, and it is built for development teams that keep a machine readable API description and want generated code to stay in step with it.
read the full openapi-generator overview →
About openapi-typescript
openapi typescript is a monorepo of tools for consuming OpenAPI schemas in TypeScript. It lives in the TypeScript developer tools ecosystem, sits under the Developer Tools / API Development & Testing category, ships under MIT license, and is eight years old. Repo holds 8,366 stars, 665 forks, and 300 open issues, with last push 2026 09 11T00:36:06Z. Topics tagged: openapi, openapi3, openapi3 1, swagger, typescript. Homepage at https://openapi ts.dev.
read the full openapi-typescript overview →
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Frequently asked questions
Is openapi-generator or openapi-typescript more popular?
openapi-generator has 26,748 GitHub stars and openapi-typescript has 8,369. openapi-generator has the larger community by that measure.
Are openapi-generator and openapi-typescript free?
Both are open source. openapi-generator is licensed under Apache-2.0 and openapi-typescript under MIT. Neither carries a licence fee.
What is the difference between openapi-generator and openapi-typescript?
openapi-generator is written in Java and openapi-typescript in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, openapi-generator or openapi-typescript?
Choose openapi-generator if you want the larger community (26,748 stars) or its Apache-2.0 licence terms. Choose openapi-typescript if its feature set, stack or MIT licence fits better. Both are self-hostable.