head to head · open source
openapi-generator vs RWKV-Runner
openapi-generator has 26,752 GitHub stars, 7,678 forks, 5,752 open issues and last shipped 3 days ago. RWKV-Runner has 6,482 stars, 601 forks, 178 open issues and last shipped 16 days ago. openapi-generator leads on adoption by 313% (26,752 vs 6,482 stars). openapi-generator is written in Java under Apache-2.0; RWKV-Runner is written in TypeScript under MIT. openapi-generator has attracted 29% as many forks as stars, RWKV-Runner 9%. 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 (api, api-client), 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 | RWKV-Runner | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 6.5K |
| License | Apache-2.0 | MIT |
| Written in | Java | TypeScript |
| Last push | 2026-09-17 | 2026-09-04 |
| Forks | ⑂ 7.7K | ⑂ 601 |
| 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 RWKV-Runner if
- You want the RWKV-Runner feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and RWKV-Runner 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 RWKV-Runner
RWKV Runner is a management and startup tool for RWKV, an open source large language model that is available for commercial use. It ships as a lightweight executable of only a few megabytes and automates the work of getting a model running, so that the user does not have to assemble the runtime, dependencies, and serving stack by hand. The project is written in TypeScript and built with Wails, and it is distributed under the MIT license from the josStorer repository. It lives in the RWKV ecosystem and in the broader local inference tooling space, with a companion site at rwkv.com.
read the full RWKV-Runner overview →
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Frequently asked questions
Is openapi-generator or RWKV-Runner more popular?
openapi-generator has 26,752 GitHub stars and RWKV-Runner has 6,482. openapi-generator has the larger community by that measure.
Are openapi-generator and RWKV-Runner free?
Both are open source. openapi-generator is licensed under Apache-2.0 and RWKV-Runner under MIT. Neither carries a licence fee.
What is the difference between openapi-generator and RWKV-Runner?
openapi-generator is written in Java and RWKV-Runner 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 RWKV-Runner?
Choose openapi-generator if you want the larger community (26,752 stars) or its Apache-2.0 licence terms. Choose RWKV-Runner if its feature set, stack or MIT licence fits better. Both are self-hostable.