head to head · open source
openapi-generator vs open-connector
openapi-generator has 26,745 GitHub stars, 7,674 forks, 5,751 open issues and last shipped yesterday. open-connector has 5,796 stars, 505 forks, 0 open issues and last shipped yesterday. openapi-generator leads on adoption by 361% (26,745 vs 5,796 stars). openapi-generator is written in Java under Apache-2.0; open-connector is written in TypeScript under Apache-2.0. openapi-generator has attracted 29% as many forks as stars, open-connector 9%. 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.
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Side by side
| openapi-generator | open-connector | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 5.8K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Java | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 7.7K | ⑂ 505 |
| 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 open-connector if
- You want the open-connector feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and open-connector 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 open-connector
OpenConnector is an open source auth gateway that connects more than a thousand SaaS providers to AI agents through a Connector SDK, the oo CLI, MCP, HTTP/OpenAPI, and a Web Console, and it is built for developers and teams wiring durable app access into agent products.
read the full open-connector overview →
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Frequently asked questions
Is openapi-generator or open-connector more popular?
openapi-generator has 26,745 GitHub stars and open-connector has 5,796. openapi-generator has the larger community by that measure.
Are openapi-generator and open-connector free?
Both are open source. openapi-generator is licensed under Apache-2.0 and open-connector under Apache-2.0. Neither carries a licence fee.
What is the difference between openapi-generator and open-connector?
openapi-generator is written in Java and open-connector 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 open-connector?
Choose openapi-generator if you want the larger community (26,745 stars) or its Apache-2.0 licence terms. Choose open-connector if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.