Source: https://seerepo.com/compare/calcom/cal.diy/vs/logto-io/logto
Markdown source: https://seerepo.com/compare/calcom/cal.diy/vs/logto-io/logto.md
Description: cal.diy and logto share 15 technologies: Postgres, Redis, React, PostHog, lru-cache, helmet, Zod, classnames, React Hook Form, jose, otplib, qrcode, nodemailer, react-easy-crop, and react-day-picker. Both are written in TypeScript.

# cal.diy vs logto

cal.diy and logto share 15 technologies: Postgres, Redis, React, PostHog, lru-cache, helmet, Zod, classnames, React Hook Form, jose, otplib, qrcode, nodemailer, react-easy-crop, and react-day-picker. Both are written in TypeScript.

- [calcom/cal.diy](https://seerepo.com/r/calcom/cal.diy): Scheduling infrastructure for absolutely everyone.
- [logto-io/logto](https://seerepo.com/r/logto-io/logto): 🧑‍🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

## What they share and what sets them apart

- In common: Postgres, Redis, React, PostHog, lru-cache, helmet, Zod, classnames, React Hook Form, jose, otplib, qrcode, nodemailer, react-easy-crop, react-day-picker
- Only in cal.diy: connect, Next.js, @nestjs/core, @nestjs/bull, @nest-lab/throttler-storage-redis, bull, Google, Sentry, Stripe, NestJS, @next/third-parties, Vercel, @trpc/server, tRPC, kysely, next-auth, class-validator, class-transformer, nest-winston, tslog, winston, winston-transport, Tailwind CSS, next-themes, class-variance-authority, TanStack, sonner, Framer, @formkit/auto-animate, Radix UI, react-select, react-inlinesvg, react-sticky-box, Lucide, bcryptjs, markdown-it, node-html-parser, react-qr-code, @hookform/resolvers, ink, ink-text-input, ink-select-input, ical.js, tailwind-merge, Base UI, entities, handlebars, dompurify, jimp, remove-markdown, sanitize-html, sharp, turndown, marked, Prisma, node-ical, lexical, cmdk, react-colorful, @lexical/markdown
- Only in logto: Vite, react-router-dom, Koa, @azure/storage-blob, Google Cloud, AWS S3, koa-router, koa-body, koa-compose, koa-mount, Lit, react-modal, @simplewebauthn/browser, superstruct, applicationinsights, ora, @aws-sdk/client-sesv2, @aws-sdk/types, @azure/msal-node, html-to-text, postmark, samlify, fast-xml-parser, Vonage, @fontsource/roboto-mono, react-hot-toast, @monaco-editor/react, @inkeep/cxkit-react, react-dnd, react-dropzone, dnd-core, Mermaid, overlayscrollbars, overlayscrollbars-react, prism-react-renderer, react-animate-height, react-confetti, react-dnd-html5-backend, react-paginate, react-syntax-highlighter, recharts, @mdx-js/react, property-information, react-markdown, remark-gfm, oidc-provider, @simplewebauthn/server, @authenio/samlify-node-xmllint, koa-logger, @react-spring/web, react-top-loading-bar, simplewebauthn

## Side by side

| | cal.diy | logto |
|---|---|---|
| Size | 554,567 lines written, 4,308 code files | 599,575 lines written, 5,092 code files |
| Who writes it | 6.3% of its commits signed by AI. With Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot | 2.8% of its commits signed by AI. With Amp, Claude Code, GitHub Copilot, Cursor, Factory, and Devin |
| Activity | Last push November 3, 2026, 16,069 commits, 49,716 stars | Last push November 8, 2026, 8,531 commits, 14,853 stars |
| Tests | 644 test files. 14.8% of its code files have a test that imports them | 1,184 test files. 18.3% 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 logto?

logto, with 599,575 lines written; cal.diy has 554,567.

The proof: [logto-io/logto's code at commit c025460](https://github.com/logto-io/logto/tree/c0254605814ee6823c30946f47e20f8007329127)

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

cal.diy, with 49,716 stars; logto has 14,853.

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

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

logto, with 1,184 test files; cal.diy has 644.

The proof: [logto-io/logto's code at commit c025460](https://github.com/logto-io/logto/tree/c0254605814ee6823c30946f47e20f8007329127)

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

logto: its last push was on November 8, 2026, and cal.diy's on November 3, 2026.

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

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

cal.diy: an AI signed 6.3% of its commits, with Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot; in logto, 2.8%.

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 5, 2026, at commit 2eb48ec (https://github.com/calcom/cal.diy/tree/2eb48eccd8aca8a0c0ffabf28cf92e298b33ecee)
- logto-io/logto: Read on November 8, 2026, at commit c025460 (https://github.com/logto-io/logto/tree/c0254605814ee6823c30946f47e20f8007329127)

## 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.