Source: https://seerepo.com/compare/calcom/cal.diy/vs/decolua/9router
Markdown source: https://seerepo.com/compare/calcom/cal.diy/vs/decolua/9router.md
Description: cal.diy and 9router share 7 technologies: Next.js, React, @next/third-parties, Tailwind CSS, bcryptjs, jose, and marked. cal.diy is written in TypeScript and 9router in JavaScript.

# cal.diy vs 9router

cal.diy and 9router share 7 technologies: Next.js, React, @next/third-parties, Tailwind CSS, bcryptjs, jose, and marked. cal.diy is written in TypeScript and 9router in JavaScript.

- [calcom/cal.diy](https://seerepo.com/r/calcom/cal.diy): Scheduling infrastructure for absolutely everyone.
- [decolua/9router](https://seerepo.com/r/decolua/9router): Unlimited FREE AI coding. Connect Claude Code, Codex, Cursor, Cline, Copilot, Antigravity to FREE Claude/GPT/Gemini via 40+ providers. Auto-fallback, RTK -40% tokens, never hit limits.

## What they share and what sets them apart

- In common: Next.js, React, @next/third-parties, Tailwind CSS, bcryptjs, jose, marked
- Only in cal.diy: connect, @nestjs/core, Postgres, @nestjs/bull, @nest-lab/throttler-storage-redis, bull, Redis, Google, Sentry, Stripe, NestJS, Vercel, PostHog, @trpc/server, tRPC, lru-cache, kysely, next-auth, helmet, class-validator, class-transformer, Zod, nest-winston, tslog, winston, winston-transport, classnames, next-themes, class-variance-authority, React Hook Form, TanStack, sonner, Framer, @formkit/auto-animate, Radix UI, react-select, react-inlinesvg, react-sticky-box, Lucide, otplib, markdown-it, node-html-parser, qrcode, react-qr-code, @hookform/resolvers, ink, ink-text-input, ink-select-input, ical.js, tailwind-merge, Base UI, entities, nodemailer, handlebars, dompurify, jimp, remove-markdown, sanitize-html, sharp, turndown, Prisma, node-ical, lexical, react-easy-crop, cmdk, react-colorful, react-day-picker, @lexical/markdown
- Only in 9router: SQLite, sql.js, recharts, @monaco-editor/react, dnd-kit, ora, xyflow, @node-saml/node-saml, prop-types, enquirer

## Side by side

| | cal.diy | 9router |
|---|---|---|
| Size | 554,567 lines written, 4,308 code files | 242,297 lines written, 1,093 code files |
| Who writes it | 6.3% of its commits signed by AI. With Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot | 29.4% of its commits signed by AI. With Cursor, Claude Code, OpenHands, and GitHub Copilot |
| Activity | Last push November 3, 2026, 16,069 commits, 49,716 stars | Last push October 28, 2026, 1,476 commits, 32,071 stars |
| Tests | 644 test files. 14.8% of its code files have a test that imports them | 434 test files. 30.1% 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, cal.diy or 9router?

cal.diy, with 554,567 lines written; 9router has 242,297.

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

### Which has more GitHub stars, cal.diy or 9router?

cal.diy, with 49,716 stars; 9router has 32,071.

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

### Which has more tests, cal.diy or 9router?

cal.diy, with 644 test files; 9router has 434.

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

### Which was updated more recently, cal.diy or 9router?

cal.diy: its last push was on November 3, 2026, and 9router's on October 28, 2026.

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

### Which has more commits signed by AI, cal.diy or 9router?

9router: an AI signed 29.4% of its commits, with Cursor, Claude Code, OpenHands, and GitHub Copilot; in cal.diy, 6.3%.

The proof: [the commits each tool signed in decolua/9router](https://seerepo.com/r/decolua/9router/ai)

## Sources

- calcom/cal.diy: Read on November 5, 2026, at commit 2eb48ec (https://github.com/calcom/cal.diy/tree/2eb48eccd8aca8a0c0ffabf28cf92e298b33ecee)
- decolua/9router: Read on November 7, 2026, at commit 1fe586b (https://github.com/decolua/9router/tree/1fe586bb1cf35e1ed0cb2150a8ef7d1db040b21d)

## 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.