head to head · open source
Mermaid vs electricitymaps-contrib
Mermaid has 90,981 GitHub stars, 9,444 forks, 1,781 open issues and last shipped yesterday. electricitymaps-contrib has 4,047 stars, 1,067 forks, 125 open issues and last shipped yesterday. Mermaid leads on adoption by 2,148% (90,981 vs 4,047 stars). Mermaid is written in TypeScript under MIT; electricitymaps-contrib is written in Python under AGPL-3.0. Mermaid has attracted 10% as many forks as stars, electricitymaps-contrib 26%. 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 | electricitymaps-contrib | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 4.0K |
| License | MIT | AGPL-3.0 |
| Written in | TypeScript | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 9.4K | ⑂ 1.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Mermaid if
- You weight community size — 91K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick electricitymaps-contrib if
- You want the electricitymaps-contrib feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Python
- You evaluated both and electricitymaps-contrib fits your workflow better
About Mermaid
Mermaid Generate diagrams from Markdown like text. Live Editor! 📖 Documentation 🚀 Getting Started 🌐 CDN 🙌 Join Us 简体中文 Try Live Editor previews of future releases: Develop Next :trophy: Mermaid was nominated and won the JS Open Source Awards (2019) in the category "The most exciting use of technology"!!! Thanks to all involved, people committing pull requests, people answering questions! 🙏 Table of content Expand contents About Examples Release Related projects Contributors Security and safe diagrams Reporting vulnerabilities Appreciation About Mermaid is a JavaScript based diagramming and charting tool…
read the full Mermaid overview →
About electricitymaps-contrib
Electricity Maps A collection of parsers to collect and standardize electricity data such as production, exchanges and price from across the globe. app.electricitymaps.com » Introduction This project aims to provide a free, open source, and transparent way to collect electricity data. We fetch the raw data from public, free, and official sources. They include official government and transmission system operators' data. This data powers the Electricity Maps platform, which includes our flow tracing algorithm, estimation models, forecast engine and much more. View it online app.electricitymaps.com, or download the…
read the full electricitymaps-contrib overview →
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Frequently asked questions
Is Mermaid or electricitymaps-contrib more popular?
Mermaid has 90,981 GitHub stars and electricitymaps-contrib has 4,047. Mermaid has the larger community by that measure.
Are Mermaid and electricitymaps-contrib free?
Both are open source. Mermaid is licensed under MIT and electricitymaps-contrib under AGPL-3.0. Neither carries a licence fee.
What is the difference between Mermaid and electricitymaps-contrib?
Mermaid is written in TypeScript and electricitymaps-contrib in Python. 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 electricitymaps-contrib?
Choose Mermaid if you want the larger community (90,981 stars) or its MIT licence terms. Choose electricitymaps-contrib if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.