Source: https://seerepo.com/compare/mermaid-js/mermaid/vs/NousResearch/hermes-agent
Markdown source: https://seerepo.com/compare/mermaid-js/mermaid/vs/NousResearch/hermes-agent.md
Description: mermaid and hermes-agent share 4 technologies: js-yaml, D3, dompurify, and katex. mermaid is written in TypeScript and hermes-agent in Python.

# mermaid vs hermes-agent

mermaid and hermes-agent share 4 technologies: js-yaml, D3, dompurify, and katex. mermaid is written in TypeScript and hermes-agent in Python.

- [mermaid-js/mermaid](https://seerepo.com/r/mermaid-js/mermaid): Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown
- [NousResearch/hermes-agent](https://seerepo.com/r/NousResearch/hermes-agent): The agent that grows with you

## What they share and what sets them apart

- In common: js-yaml, D3, dompurify, katex
- Only in mermaid: markdown-table, sharp, stylis, roughjs, dagre-d3-es, cytoscape, cytoscape-cose-bilkent, cytoscape-fcose, elkjs, @braintree/sanitize-url, marked, Ajv
- Only in hermes-agent: React, FastAPI, Vite, Tauri, Tokio, @tauri-apps/api, React Router, Electron, Rich, jinja2, openpyxl, Zod, Tailwind CSS, class-variance-authority, tailwind-merge, Radix UI, Lucide, tracing, tracing-subscriber, xterm, dnd-kit, motion, @tanstack/react-virtual, cmdk, CodeMirror, react-dnd-html5-backend, use-stick-to-bottom, @icons-pack/react-simple-icons, streamdown, qrcode, shiki, yaml, remark-math, unified

## Side by side

| | mermaid | hermes-agent |
|---|---|---|
| Size | 232,641 lines written, 670 code files | 3,858,936 lines written, 5,274 code files |
| Who writes it | 5.1% of its commits signed by AI. With Claude Code, Codex, Cursor, GitHub Copilot, and CodeRabbit | 2.2% of its commits signed by AI. With Claude Code, Cursor, Codex, GitHub Copilot, Devin, OpenHands, Factory, Jules, and Crush |
| Activity | Last push November 4, 2026, 11,988 commits, 91,011 stars | Last push November 4, 2026, 58,269 commits, 260,334 stars |
| Tests | 505 test files. 40.1% of its code files have a test that imports them | 10,042 test files. 65.7% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, mermaid or hermes-agent?

hermes-agent, with 3,858,936 lines written; mermaid has 232,641.

The proof: [NousResearch/hermes-agent's code at commit 71736c9](https://github.com/NousResearch/hermes-agent/tree/71736c9f32597bbca9d89cede5aa136e55946b2f)

### Which has more GitHub stars, mermaid or hermes-agent?

hermes-agent, with 260,334 stars; mermaid has 91,011.

The proof: [NousResearch/hermes-agent on GitHub](https://github.com/NousResearch/hermes-agent)

### Which has more tests, mermaid or hermes-agent?

hermes-agent, with 10,042 test files; mermaid has 505.

The proof: [NousResearch/hermes-agent's code at commit 71736c9](https://github.com/NousResearch/hermes-agent/tree/71736c9f32597bbca9d89cede5aa136e55946b2f)

### Which was updated more recently, mermaid or hermes-agent?

Both got their last push on November 4, 2026.

The proof: [mermaid-js/mermaid's commits on GitHub](https://github.com/mermaid-js/mermaid/commits)

### Which has more commits signed by AI, mermaid or hermes-agent?

mermaid: an AI signed 5.1% of its commits, with Claude Code, Codex, Cursor, GitHub Copilot, and CodeRabbit; in hermes-agent, 2.2%.

The proof: [the commits each tool signed in mermaid-js/mermaid](https://seerepo.com/r/mermaid-js/mermaid/ai)

## Sources

- mermaid-js/mermaid: Read on November 4, 2026, at commit 63333fd (https://github.com/mermaid-js/mermaid/tree/63333fd8db0540377d84795c7a43c59ded353b18)
- NousResearch/hermes-agent: Read on November 4, 2026, at commit 71736c9 (https://github.com/NousResearch/hermes-agent/tree/71736c9f32597bbca9d89cede5aa136e55946b2f)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.