head to head · open source
Hoppscotch vs openapi-generator
Hoppscotch has 80,331 GitHub stars, 6,110 forks, 820 open issues and last shipped 2 days ago. openapi-generator has 26,745 stars, 7,674 forks, 5,751 open issues and last shipped yesterday. Hoppscotch leads on adoption by 200% (80,331 vs 26,745 stars). Hoppscotch is written in TypeScript under MIT; openapi-generator is written in Java under Apache-2.0. Hoppscotch has attracted 8% as many forks as stars, openapi-generator 29%. openapi-generator was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 4 topic tags (api, api-client, rest, rest-api), 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
| Hoppscotch | openapi-generator | |
|---|---|---|
| GitHub stars | ★ 80K | ★ 27K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | Java |
| Last push | 2026-09-16 | 2026-09-17 |
| Forks | ⑂ 6.1K | ⑂ 7.7K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Hoppscotch if
- You weight community size — 80K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick openapi-generator if
- You want the openapi-generator feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and openapi-generator fits your workflow better
About Hoppscotch
Hoppscotch is an open source API development ecosystem that provides a full featured client for designing, testing, and documenting APIs. It operates as a web based application, desktop app, and CLI tool, supporting offline, on premises, and cloud deployments. Built with TypeScript and licensed under MIT, it serves as a direct open source alternative to proprietary tools like Postman and Insomnia.
read the full Hoppscotch overview →
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 →
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Frequently asked questions
Is Hoppscotch or openapi-generator more popular?
Hoppscotch has 80,331 GitHub stars and openapi-generator has 26,745. Hoppscotch has the larger community by that measure.
Are Hoppscotch and openapi-generator free?
Both are open source. Hoppscotch is licensed under MIT and openapi-generator under Apache-2.0. Neither carries a licence fee.
What is the difference between Hoppscotch and openapi-generator?
Hoppscotch is written in TypeScript and openapi-generator in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Hoppscotch or openapi-generator?
Choose Hoppscotch if you want the larger community (80,331 stars) or its MIT licence terms. Choose openapi-generator if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.