Source: https://seerepo.com/compare/ahmedkhaleel2004/gitdiagram/vs/calcom/cal.diy
Markdown source: https://seerepo.com/compare/ahmedkhaleel2004/gitdiagram/vs/calcom/cal.diy.md
Description: gitdiagram and cal.diy share 13 technologies: React, Next.js, Redis, PostHog, Stripe, Tailwind CSS, next-themes, tailwind-merge, Radix UI, sonner, Lucide, dompurify, and Zod. Both are written in TypeScript.

# gitdiagram vs cal.diy

gitdiagram and cal.diy share 13 technologies: React, Next.js, Redis, PostHog, Stripe, Tailwind CSS, next-themes, tailwind-merge, Radix UI, sonner, Lucide, dompurify, and Zod. Both are written in TypeScript.

- [ahmedkhaleel2004/gitdiagram](https://seerepo.com/r/ahmedkhaleel2004/gitdiagram): Visualize any GitHub codebase: free interactive architecture diagrams and one-minute explainer videos. Replace 'hub' with 'diagram' in any GitHub URL.
- [calcom/cal.diy](https://seerepo.com/r/calcom/cal.diy): Scheduling infrastructure for absolutely everyone.

## What they share and what sets them apart

- In common: React, Next.js, Redis, PostHog, Stripe, Tailwind CSS, next-themes, tailwind-merge, Radix UI, sonner, Lucide, dompurify, Zod
- Only in gitdiagram: @aws-sdk/s3-request-presigner, MCP, OpenAI, Anthropic, Resend, geist, Mermaid, Cloudflare
- Only in cal.diy: connect, @nestjs/core, Postgres, @nestjs/bull, @nest-lab/throttler-storage-redis, bull, Google, Sentry, NestJS, @next/third-parties, Vercel, @trpc/server, tRPC, lru-cache, kysely, next-auth, helmet, class-validator, class-transformer, nest-winston, tslog, winston, winston-transport, classnames, class-variance-authority, React Hook Form, TanStack, Framer, @formkit/auto-animate, react-select, react-inlinesvg, react-sticky-box, bcryptjs, jose, otplib, markdown-it, node-html-parser, qrcode, react-qr-code, @hookform/resolvers, ink, ink-text-input, ink-select-input, ical.js, Base UI, entities, nodemailer, handlebars, jimp, remove-markdown, sanitize-html, sharp, turndown, marked, Prisma, node-ical, lexical, react-easy-crop, cmdk, react-colorful, react-day-picker, @lexical/markdown

## Side by side

| | gitdiagram | cal.diy |
|---|---|---|
| Size | 113,910 lines written, 376 code files | 554,567 lines written, 4,308 code files |
| Who writes it | 50.9% of its commits signed by AI. With Claude Code and Codex | 6.3% of its commits signed by AI. With Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot |
| Activity | Last push November 4, 2026, 744 commits, 18,767 stars | Last push November 3, 2026, 16,069 commits, 49,716 stars |
| Tests | 233 test files. 69.7% of its code files have a test that imports them | 644 test files. 14.8% 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, gitdiagram or cal.diy?

cal.diy, with 554,567 lines written; gitdiagram has 113,910.

The proof: [calcom/cal.diy's code at commit 2eb48ec](https://github.com/calcom/cal.diy/tree/2eb48eccd8aca8a0c0ffabf28cf92e298b33ecee)

### Which has more GitHub stars, gitdiagram or cal.diy?

cal.diy, with 49,716 stars; gitdiagram has 18,767.

The proof: [calcom/cal.diy on GitHub](https://github.com/calcom/cal.diy)

### Which has more tests, gitdiagram or cal.diy?

cal.diy, with 644 test files; gitdiagram has 233.

The proof: [calcom/cal.diy's code at commit 2eb48ec](https://github.com/calcom/cal.diy/tree/2eb48eccd8aca8a0c0ffabf28cf92e298b33ecee)

### Which was updated more recently, gitdiagram or cal.diy?

gitdiagram: its last push was on November 4, 2026, and cal.diy's on November 3, 2026.

The proof: [ahmedkhaleel2004/gitdiagram's commits on GitHub](https://github.com/ahmedkhaleel2004/gitdiagram/commits)

### Which has more commits signed by AI, gitdiagram or cal.diy?

gitdiagram: an AI signed 50.9% of its commits, with Claude Code and Codex; in cal.diy, 6.3%.

The proof: [the commits each tool signed in ahmedkhaleel2004/gitdiagram](https://seerepo.com/r/ahmedkhaleel2004/gitdiagram/ai)

## Sources

- ahmedkhaleel2004/gitdiagram: Read on November 6, 2026, at commit 2ae1828 (https://github.com/ahmedkhaleel2004/gitdiagram/tree/2ae1828cbc0800b8493944a29aa3d0bc30083edf)
- calcom/cal.diy: Read on November 5, 2026, at commit 2eb48ec (https://github.com/calcom/cal.diy/tree/2eb48eccd8aca8a0c0ffabf28cf92e298b33ecee)

## 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.