head to head · open source
openapi-generator vs Yaak
openapi-generator has 26,846 GitHub stars, 7,748 forks, 5,819 open issues and last shipped yesterday. Yaak has 19,399 stars, 840 forks, 19 open issues and last shipped yesterday. openapi-generator leads on adoption by 38% (26,846 vs 19,399 stars). openapi-generator is written in Java under Apache-2.0; Yaak is written in TypeScript under MIT. openapi-generator has attracted 29% as many forks as stars, Yaak 4%. openapi-generator was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
← all 20902 open source comparisons
Side by side
| openapi-generator | Yaak | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 19K |
| License | Apache-2.0 | MIT |
| Written in | Java | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 7.7K | ⑂ 840 |
| 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 Yaak if
- You want the Yaak feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and Yaak fits your workflow better
About openapi-generator
OpenAPI Generator Master ( 7.27.0 ): :star::star::star: If you would like to contribute, please refer to guidelines and a list of open tasks. :star::star::star: :bangbang: To migrate from Swagger Codegen to OpenAPI Generator, please refer to the migration guide :bangbang: :notebook with decorative cover: For more information, please refer to the Wiki page and FAQ :notebook with decorative cover: :notebook with decorative cover: The eBook A Beginner's Guide to Code Generation for REST APIs is a good starting point for beginners :notebook with decorative cover: :warning: If the OpenAPI spec, templates or any input…
read the full openapi-generator overview →
About Yaak
💫 Yaak ➟ Desktop API Client 💫 A fast, privacy first API client for REST, GraphQL, SSE, WebSocket, and gRPC – built with Tauri, Rust, and React. Development is funded by community purchased licenses . You can also become a sponsor to have your logo appear below. 💖 Features Yaak is an offline first API client designed to stay out of your way while giving you everything you need when you need it. Built with Tauri, Rust, and React, it’s fast, lightweight, and private. No telemetry, no VC funding, and no cloud lock in. 🌐 Work with any API Import collections from Postman, Insomnia, OpenAPI, Swagger, or Curl. Send…
More in Developer Tools
Related comparisons
More API Development & Testing projects
Compare either of these against the rest of the API Development & Testing field.
Frequently asked questions
Is openapi-generator or Yaak more popular?
openapi-generator has 26,846 GitHub stars and Yaak has 19,399. openapi-generator has the larger community by that measure.
Are openapi-generator and Yaak free?
Both are open source. openapi-generator is licensed under Apache-2.0 and Yaak under MIT. Neither carries a licence fee.
What is the difference between openapi-generator and Yaak?
openapi-generator is written in Java and Yaak 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 Yaak?
Choose openapi-generator if you want the larger community (26,846 stars) or its Apache-2.0 licence terms. Choose Yaak if its feature set, stack or MIT licence fits better. Both are self-hostable.