head to head · open source
Mermaid vs open-dronelog
Mermaid has 90,299 GitHub stars, 9,266 forks, 1,781 open issues and last shipped 4 days ago. open-dronelog has 1,532 stars, 210 forks, 29 open issues and last shipped 12 days ago. Mermaid leads on adoption by 5,794% (90,299 vs 1,532 stars). Mermaid is written in TypeScript under MIT; open-dronelog is written in TypeScript under AGPL-3.0. Mermaid has attracted 10% as many forks as stars, open-dronelog 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 | open-dronelog | |
|---|---|---|
| GitHub stars | ★ 90K | ★ 1.5K |
| License | MIT | AGPL-3.0 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-15 | 2026-09-07 |
| Forks | ⑂ 9.3K | ⑂ 210 |
| 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 open-dronelog if
- You want the open-dronelog feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and open-dronelog 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 open-dronelog
Open Drone Log is a free, AGPL 3.0 licensed dashboard that imports DJI and Litchi flight logs into a local DuckDB database and analyzes them through a Tauri v2 desktop app or a self hosted web deployment, for pilots and drone teams that want private flight analytics without a subscription.
read the full open-dronelog overview →
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Frequently asked questions
Is Mermaid or open-dronelog more popular?
Mermaid has 90,299 GitHub stars and open-dronelog has 1,532. Mermaid has the larger community by that measure.
Are Mermaid and open-dronelog free?
Both are open source. Mermaid is licensed under MIT and open-dronelog under AGPL-3.0. Neither carries a licence fee.
What is the difference between Mermaid and open-dronelog?
Mermaid is written in TypeScript and open-dronelog 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, Mermaid or open-dronelog?
Choose Mermaid if you want the larger community (90,299 stars) or its MIT licence terms. Choose open-dronelog if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.