head to head · open source
Understand-Anything vs oh-my-mermaid
Understand-Anything has 83,188 GitHub stars, 7,017 forks, 303 open issues and last shipped 6 days ago. oh-my-mermaid has 2,264 stars, 196 forks, 11 open issues and last shipped 5 months ago. Understand-Anything leads on adoption by 3,574% (83,188 vs 2,264 stars). Understand-Anything is written in TypeScript under MIT; oh-my-mermaid is written in TypeScript under MIT. Understand-Anything has attracted 8% as many forks as stars, oh-my-mermaid 9%. Understand-Anything was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (claude-code), so they are genuine substitutes rather than adjacent tools.
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
| Understand-Anything | oh-my-mermaid | |
|---|---|---|
| GitHub stars | ★ 83K | ★ 2.3K |
| License | MIT | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-12 | 2026-04-07 |
| Forks | ⑂ 7.0K | ⑂ 196 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Understand-Anything if
- You weight community size — 83K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick oh-my-mermaid if
- You want the oh-my-mermaid feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and oh-my-mermaid fits your workflow better
About Understand-Anything
Understand Anything is an open source TypeScript project, released under the MIT license and developed by Egonex from an original creation by Lum1104. It ships as a plugin for Claude Code and also works with Codex, Cursor, Copilot, Gemini CLI and other agent platforms. The project analyzes a codebase through a multi agent pipeline that extracts every file, function, class and dependency, then builds a knowledge graph which it presents in an interactive dashboard. A hosted live demo is available on the project homepage for anyone who wants to pan, zoom, search and explore without running the analysis locally.…
read the full Understand-Anything overview →
About oh-my-mermaid
English Türkçe 한국어 日本語 中文 Oh my mermaid AI writes code in seconds. Humans understand it in hours. But skip understanding, the codebase becomes a black box — even to you. omm closes the gap — architecture docs, generated by AI, for humans. Quick Start Paste this in your terminal: Then open your AI coding tool and use the /omm scan skill: That's it. View the result: Example omm scanned itself. This is what it found. How It Works Your AI analyzes the codebase and generates perspectives — different lenses on your architecture (structure, data flow, integrations...). Each perspective contains a Mermaid diagram and doc…
read the full oh-my-mermaid overview →
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Frequently asked questions
Is Understand-Anything or oh-my-mermaid more popular?
Understand-Anything has 83,188 GitHub stars and oh-my-mermaid has 2,264. Understand-Anything has the larger community by that measure.
Are Understand-Anything and oh-my-mermaid free?
Both are open source. Understand-Anything is licensed under MIT and oh-my-mermaid under MIT. Neither carries a licence fee.
What is the difference between Understand-Anything and oh-my-mermaid?
Understand-Anything is written in TypeScript and oh-my-mermaid 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, Understand-Anything or oh-my-mermaid?
Choose Understand-Anything if you want the larger community (83,188 stars) or its MIT licence terms. Choose oh-my-mermaid if its feature set, stack or MIT licence fits better. Both are self-hostable.