head to head · open source
openapi-generator vs goa
openapi-generator has 26,745 GitHub stars, 7,674 forks, 5,751 open issues and last shipped yesterday. goa has 6,101 stars, 583 forks, 38 open issues and last shipped yesterday. openapi-generator leads on adoption by 338% (26,745 vs 6,101 stars). openapi-generator is written in Java under Apache-2.0; goa is written in Go under MIT. openapi-generator has attracted 29% as many forks as stars, goa 10%. 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 (api, openapi, rest), 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 | goa | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 6.1K |
| License | Apache-2.0 | MIT |
| Written in | Java | Go |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 7.7K | ⑂ 583 |
| 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 goa if
- You want the goa feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and goa 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 goa
Goa is a design first framework for building APIs and microservices in Go. It lives in the Go ecosystem and is distributed under the MIT license, with a repository that has been active for roughly twelve years and currently carries about 6,100 stars, 583 forks, and 38 open issues. Instead of writing transport and boilerplate code by hand, a developer expresses the intent of an API in a type safe domain specific language, and Goa generates the server interfaces, client packages, transport adapters, and documentation from that single design. The project describes itself as generating between 30 and 50 percent of a …
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Frequently asked questions
Is openapi-generator or goa more popular?
openapi-generator has 26,745 GitHub stars and goa has 6,101. openapi-generator has the larger community by that measure.
Are openapi-generator and goa free?
Both are open source. openapi-generator is licensed under Apache-2.0 and goa under MIT. Neither carries a licence fee.
What is the difference between openapi-generator and goa?
openapi-generator is written in Java and goa 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 goa?
Choose openapi-generator if you want the larger community (26,745 stars) or its Apache-2.0 licence terms. Choose goa if its feature set, stack or MIT licence fits better. Both are self-hostable.