head to head · open source
Mermaid vs allure2
Mermaid has 90,293 GitHub stars, 9,266 forks, 1,781 open issues and last shipped 3 days ago. allure2 has 5,538 stars, 784 forks, 87 open issues and last shipped 7 days ago. Mermaid leads on adoption by 1,530% (90,293 vs 5,538 stars). Mermaid is written in TypeScript under MIT; allure2 is written in HTML under Apache-2.0. Mermaid has attracted 10% as many forks as stars, allure2 14%. Mermaid 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
| Mermaid | allure2 | |
|---|---|---|
| GitHub stars | ★ 90K | ★ 5.5K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | HTML |
| Last push | 2026-09-15 | 2026-09-11 |
| Forks | ⑂ 9.3K | ⑂ 784 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Mermaid if
- You weight community size — 90K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick allure2 if
- You want the allure2 feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches HTML
- You evaluated both and allure2 fits your workflow better
About Mermaid
Mermaid is a JavaScript based diagramming tool that renders diagrams from Markdown like text definitions. It lives in the JavaScript/TypeScript ecosystem and operates both in the browser and in Node.js environments. The project’s core purpose is to eliminate the gap between software development and documentation by letting developers write diagrams alongside code, avoiding the rot and overhead of manual diagram maintenance.
read the full Mermaid overview →
About allure2
Allure Report is a flexible, lightweight, multi language test reporting tool that produces clear graphical reports from test execution data. It lives in the Data & Analytics / Business Intelligence & Reporting category, is written primarily in HTML, and is distributed under the Apache 2.0 license. The project is hosted at allurereport.org and maintained under the allure framework organization, with topics covering allure, reporting, and reporting engine. It has been in development for roughly ten years and carries 5,536 stars, 782 forks, and 87 open issues.
read the full allure2 overview →
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Frequently asked questions
Is Mermaid or allure2 more popular?
Mermaid has 90,293 GitHub stars and allure2 has 5,538. Mermaid has the larger community by that measure.
Are Mermaid and allure2 free?
Both are open source. Mermaid is licensed under MIT and allure2 under Apache-2.0. Neither carries a licence fee.
What is the difference between Mermaid and allure2?
Mermaid is written in TypeScript and allure2 in HTML. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Mermaid or allure2?
Choose Mermaid if you want the larger community (90,293 stars) or its MIT licence terms. Choose allure2 if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.