head to head · open source
openapi-generator vs typia
openapi-generator has 26,745 GitHub stars, 7,674 forks, 5,751 open issues and last shipped yesterday. typia has 5,911 stars, 224 forks, 4 open issues and last shipped yesterday. openapi-generator leads on adoption by 352% (26,745 vs 5,911 stars). openapi-generator is written in Java under Apache-2.0; typia is written in Go under MIT. openapi-generator has attracted 29% as many forks as stars, typia 4%. openapi-generator was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (generator, hacktoberfest, openapi), 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 | typia | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 5.9K |
| License | Apache-2.0 | MIT |
| Written in | Java | Go |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 7.7K | ⑂ 224 |
| 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 typia if
- You want the typia feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and typia 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 typia
Typia is an MIT licensed TypeScript transformer library that compiles pure TypeScript types into super fast runtime validators and serializers, built for TypeScript and Node.js developers who want runtime type safety without writing or maintaining a separate schema.
read the full typia overview →
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Frequently asked questions
Is openapi-generator or typia more popular?
openapi-generator has 26,745 GitHub stars and typia has 5,911. openapi-generator has the larger community by that measure.
Are openapi-generator and typia free?
Both are open source. openapi-generator is licensed under Apache-2.0 and typia under MIT. Neither carries a licence fee.
What is the difference between openapi-generator and typia?
openapi-generator is written in Java and typia in Go. 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 typia?
Choose openapi-generator if you want the larger community (26,745 stars) or its Apache-2.0 licence terms. Choose typia if its feature set, stack or MIT licence fits better. Both are self-hostable.