Source: https://seerepo.com/compare/calcom/cal.diy/vs/seerr-team/seerr
Markdown source: https://seerepo.com/compare/calcom/cal.diy/vs/seerr-team/seerr.md
Description: cal.diy and seerr share 9 technologies: Next.js, React, lru-cache, Zod, winston, Tailwind CSS, react-select, tailwind-merge, and nodemailer. Both are written in TypeScript.

# cal.diy vs seerr

cal.diy and seerr share 9 technologies: Next.js, React, lru-cache, Zod, winston, Tailwind CSS, react-select, tailwind-merge, and nodemailer. Both are written in TypeScript.

- [calcom/cal.diy](https://seerepo.com/r/calcom/cal.diy): Scheduling infrastructure for absolutely everyone.
- [seerr-team/seerr](https://seerepo.com/r/seerr-team/seerr): Open-source media request and discovery manager for Jellyfin, Plex, and Emby.

## What they share and what sets them apart

- In common: Next.js, React, lru-cache, Zod, winston, Tailwind CSS, react-select, tailwind-merge, nodemailer
- Only in cal.diy: connect, NestJS, Postgres, @nestjs/bull, @nest-lab/throttler-storage-redis, bull, Redis, Google, Sentry, Stripe, @next/third-parties, Vercel, PostHog, @trpc/server, @jetstreamapp/soql-parser-js, tRPC, kysely, next-auth, helmet, class-validator, class-transformer, @axiomhq/winston, nest-winston, tslog, winston-transport, classnames, next-themes, class-variance-authority, React Hook Form, TanStack, sonner, Framer, @formkit/auto-animate, Radix UI, @hookform/error-message, react-digit-input, react-inlinesvg, @dub/embed-react, Glide, kbar, react-phone-input-2, react-sticky-box, react-timezone-select, react-turnstile, Lucide, bcryptjs, jose, otplib, mailhog, markdown-it, node-html-parser, qrcode, react-qr-code, @hookform/resolvers, @todesktop/client-core, ink, ink-text-input, ink-select-input, @googleapis/oauth2, ical.js, Base UI, entities, handlebars, @trigger.dev/sdk, @sendgrid/client, dompurify, jimp, remove-markdown, sanitize-html, sharp, turndown, marked, Prisma, node-ical, lexical, react-easy-crop, cmdk, react-colorful, react-day-picker, @lexical/markdown
- Only in seerr: Express, @fontsource-variable/inter, Formik, Headless UI, react-intersection-observer, react-hot-toast, react-popper-tooltip, @react-spring/web, ace-builds, react-ace, react-animate-height, react-aria, react-transition-group, swagger-ui-express, @heroicons/react, country-flag-icons, TypeORM, bcrypt, express-session, react-markdown, email-templates, xml2js, js-yaml, yup, validator, express-openapi-validator, winston-daily-rotate-file

## Side by side

| | cal.diy | seerr |
|---|---|---|
| Size | 554,567 lines written, 4,285 code files | 106,452 lines written, 573 code files |
| Who writes it | 6.3% of its commits signed by AI. With Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot | 0.3% of its commits signed by AI. With GitHub Copilot, CodeRabbit, and Claude Code |
| Activity | Last push November 3, 2026, 16,069 commits, 49,876 stars | Last push November 9, 2026, 3,005 commits, 13,162 stars |
| Tests | 644 test files. 14.8% of its code files have a test that imports them | 44 test files. 9.9% 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 seerr?

cal.diy, with 554,567 lines written; seerr has 106,452.

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 seerr?

cal.diy, with 49,876 stars; seerr has 13,162.

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

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

cal.diy, with 644 test files; seerr has 44.

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 seerr?

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

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

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

cal.diy: an AI signed 6.3% of its commits, with Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot; in seerr, 0.3%.

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

## Sources

- calcom/cal.diy: Read on November 10, 2026, at commit 2eb48ec (https://github.com/calcom/cal.diy/tree/2eb48eccd8aca8a0c0ffabf28cf92e298b33ecee)
- seerr-team/seerr: Read on November 10, 2026, at commit 3f7d5c3 (https://github.com/seerr-team/seerr/tree/3f7d5c3bd2aff1af49f4a06e277f7dee0c2f2f14)

## 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.