head to head · open source
OpenAPI-Specification vs SafeLine
OpenAPI-Specification has 31,291 GitHub stars, 9,145 forks, 80 open issues and last shipped 12 days ago. SafeLine has 23,154 stars, 1,592 forks, 69 open issues and last shipped 12 days ago. OpenAPI-Specification leads on adoption by 35% (31,291 vs 23,154 stars). OpenAPI-Specification is written in Markdown under Apache-2.0; SafeLine is written in Go under GPL-3.0. OpenAPI-Specification has attracted 29% as many forks as stars, SafeLine 7%. OpenAPI-Specification 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-Specification | SafeLine | |
|---|---|---|
| GitHub stars | ★ 31K | ★ 23K |
| License | Apache-2.0 | GPL-3.0 |
| Written in | Markdown | Go |
| Last push | 2026-10-22 | 2026-10-22 |
| Forks | ⑂ 9.1K | ⑂ 1.6K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenAPI-Specification if
- You weight community size — 31K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Markdown
- 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-Specification
The OpenAPI Specification The OpenAPI Specification is a community driven open specification within the OpenAPI Initiative, a Linux Foundation Collaborative Project. The OpenAPI Specification (OAS) defines a standard, programming language agnostic interface description for HTTP APIs. This allows both humans and computers to discover and understand the capabilities of a service without requiring access to source code, additional documentation, or inspection of network traffic. When properly defined via OpenAPI, a consumer can understand and interact with the remote service with a minimal amount of implementation…
read the full OpenAPI-Specification overview →
About SafeLine
SafeLine Make your web apps secure 🏠 Website 📖 Docs 🔍 Live Demo 🙋♂️ Discord 中文版 🏆 Achievements 👋 INTRODUCTION SafeLine is a self hosted WAF(Web Application Firewall) to protect your web apps from attacks and exploits. A web application firewall helps protect web apps by filtering and monitoring HTTP traffic between a web application and the Internet. It typically protects web apps from attacks such as SQL injection , XSS , code injection , os command injection , CRLF injection , ldap injection , xpath injection , RCE , XXE , SSRF , path traversal , backdoor , bruteforce , http flood , bot abused , among…
read the full SafeLine overview →
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Frequently asked questions
Is OpenAPI-Specification or SafeLine more popular?
OpenAPI-Specification has 31,291 GitHub stars and SafeLine has 23,154. OpenAPI-Specification has the larger community by that measure.
Are OpenAPI-Specification and SafeLine free?
Both are open source. OpenAPI-Specification is licensed under Apache-2.0 and SafeLine under GPL-3.0. Neither carries a licence fee.
What is the difference between OpenAPI-Specification and SafeLine?
OpenAPI-Specification is written in Markdown 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-Specification or SafeLine?
Choose OpenAPI-Specification if you want the larger community (31,291 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.