head to head · open source
Mermaid vs openchatbi
Mermaid has 90,981 GitHub stars, 9,444 forks, 1,781 open issues and last shipped yesterday. openchatbi has 676 stars, 94 forks, 2 open issues and last shipped 5 days ago. Mermaid leads on adoption by 13,359% (90,981 vs 676 stars). Mermaid is written in TypeScript under MIT; openchatbi is written in Python under MIT. Mermaid has attracted 10% as many forks as stars, openchatbi 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.
← all 20902 open source comparisons
Side by side
| Mermaid | openchatbi | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 676 |
| License | MIT | MIT |
| Written in | TypeScript | Python |
| Last push | 2026-11-02 | 2026-10-29 |
| Forks | ⑂ 9.4K | ⑂ 94 |
| 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 openchatbi if
- You want the openchatbi feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and openchatbi 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 openchatbi
OpenChatBI OpenChatBI is an open source, chat based intelligent BI tool powered by large language models, designed to help users query, analyze, and visualize data through natural language conversations. Built on LangGraph and LangChain ecosystem, it provides chat agents and workflows that support natural language to SQL conversion and streamlined data analysis. Join the Slack channel to discuss: Invitation Link To Join Core Features 1. Natural Language Interaction : Get data analysis results by asking questions in natural language 2. Automatic SQL Generation : Convert natural language queries into SQL…
read the full openchatbi overview →
More in Data & Analytics
Related comparisons
More Business Intelligence & Reporting projects
Compare either of these against the rest of the Business Intelligence & Reporting field.
Frequently asked questions
Is Mermaid or openchatbi more popular?
Mermaid has 90,981 GitHub stars and openchatbi has 676. Mermaid has the larger community by that measure.
Are Mermaid and openchatbi free?
Both are open source. Mermaid is licensed under MIT and openchatbi under MIT. Neither carries a licence fee.
What is the difference between Mermaid and openchatbi?
Mermaid is written in TypeScript and openchatbi 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 openchatbi?
Choose Mermaid if you want the larger community (90,981 stars) or its MIT licence terms. Choose openchatbi if its feature set, stack or MIT licence fits better. Both are self-hostable.