head to head · open source
Mermaid vs DeepBI
Mermaid has 90,309 GitHub stars, 9,270 forks, 1,781 open issues and last shipped 2 days ago. DeepBI has 2,383 stars, 370 forks, 71 open issues and last shipped 23 days ago. Mermaid leads on adoption by 3,690% (90,309 vs 2,383 stars). Mermaid is written in TypeScript under MIT; DeepBI is written in Python under MIT. Mermaid has attracted 10% as many forks as stars, DeepBI 16%. 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 | DeepBI | |
|---|---|---|
| GitHub stars | ★ 90K | ★ 2.4K |
| License | MIT | MIT |
| Written in | TypeScript | Python |
| Last push | 2026-09-18 | 2026-08-28 |
| Forks | ⑂ 9.3K | ⑂ 370 |
| 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 DeepBI if
- You want the DeepBI feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and DeepBI 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 DeepBI
DeepBI is an open source Python AI native data analysis platform in the business intelligence and data analytics ecosystem. It uses large language models to help users explore, query, visualize, and share data from connected sources. The MIT licensed project presents itself as a conversational data scientist for data driven decisions.
read the full DeepBI overview →
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Frequently asked questions
Is Mermaid or DeepBI more popular?
Mermaid has 90,309 GitHub stars and DeepBI has 2,383. Mermaid has the larger community by that measure.
Are Mermaid and DeepBI free?
Both are open source. Mermaid is licensed under MIT and DeepBI under MIT. Neither carries a licence fee.
What is the difference between Mermaid and DeepBI?
Mermaid is written in TypeScript and DeepBI 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 DeepBI?
Choose Mermaid if you want the larger community (90,309 stars) or its MIT licence terms. Choose DeepBI if its feature set, stack or MIT licence fits better. Both are self-hostable.