head to head · open source
openapi-generator vs SafeLine
openapi-generator has 26,745 GitHub stars, 7,674 forks, 5,751 open issues and last shipped yesterday. SafeLine has 22,606 stars, 1,533 forks, 69 open issues and last shipped 8 days ago. openapi-generator leads on adoption by 18% (26,745 vs 22,606 stars). openapi-generator is written in Java under Apache-2.0; SafeLine is written in Go under GPL-3.0. openapi-generator has attracted 29% as many forks as stars, SafeLine 7%. 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 | SafeLine | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 23K |
| License | Apache-2.0 | GPL-3.0 |
| Written in | Java | Go |
| Last push | 2026-09-17 | 2026-09-10 |
| Forks | ⑂ 7.7K | ⑂ 1.5K |
| 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 SafeLine if
- You want the SafeLine feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Go
- You evaluated both and SafeLine 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 SafeLine
SafeLine is a self hosted web application firewall and reverse proxy, written in Go and licensed under GPL 3.0, that filters, monitors, and blocks malicious HTTP/S traffic before it reaches a web application — built for developers, AppSec engineers, and blue teams who want to run edge protection on their own infrastructure.
read the full SafeLine overview →
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Frequently asked questions
Is openapi-generator or SafeLine more popular?
openapi-generator has 26,745 GitHub stars and SafeLine has 22,606. openapi-generator has the larger community by that measure.
Are openapi-generator and SafeLine free?
Both are open source. openapi-generator is licensed under Apache-2.0 and SafeLine under GPL-3.0. Neither carries a licence fee.
What is the difference between openapi-generator and SafeLine?
openapi-generator is written in Java and SafeLine 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 SafeLine?
Choose openapi-generator if you want the larger community (26,745 stars) or its Apache-2.0 licence terms. Choose SafeLine if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.