Source: https://seerepo.com/compare/calcom/cal.diy/vs/gitroomhq/postiz-app
Markdown source: https://seerepo.com/compare/calcom/cal.diy/vs/gitroomhq/postiz-app.md
Description: cal.diy and postiz-app share 7 technologies: Next.js, React, Postgres, Redis, Sentry, Google, and Stripe. Both are written in TypeScript.

# cal.diy vs postiz-app

cal.diy and postiz-app share 7 technologies: Next.js, React, Postgres, Redis, Sentry, Google, and Stripe. Both are written in TypeScript.

- [calcom/cal.diy](https://seerepo.com/r/calcom/cal.diy): Scheduling infrastructure for absolutely everyone.
- [gitroomhq/postiz-app](https://seerepo.com/r/gitroomhq/postiz-app): 📨 The ultimate agentic social media scheduling tool 🤖

## What they share and what sets them apart

- In common: Next.js, React, Postgres, Redis, Sentry, Google, Stripe
- Only in cal.diy: PostHog
- Only in postiz-app: OpenAI, Node.js, MCP, Resend

## Side by side

| | cal.diy | postiz-app |
|---|---|---|
| Size | 554,284 lines written, 4,310 code files | 132,403 lines written, 780 code files |
| Who writes it | 6.3% of its commits signed by AI. With Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot | 11.5% of its commits signed by AI. With Claude Code and GitHub Copilot |
| Activity | Last push October 29, 2026, 16,062 commits, 49,552 stars | Last push October 31, 2026, 2,715 commits, 40,328 stars |
| Tests | 642 test files. 14.8% of its code files have a test that imports them | 0 test files |

- 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 postiz-app?

cal.diy, with 554,284 lines written in 4,310 code files; postiz-app has 132,403 in 780.

The proof: [calcom/cal.diy's code at commit 2e41247](https://github.com/calcom/cal.diy/tree/2e412471fc1f42c662005854a47c48128c479b0a)

### Which has more GitHub stars, cal.diy or postiz-app?

cal.diy, with 49,552 stars; postiz-app has 40,328.

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

### Which has more tests, cal.diy or postiz-app?

cal.diy, with 642 test files.

The proof: [calcom/cal.diy's code at commit 2e41247](https://github.com/calcom/cal.diy/tree/2e412471fc1f42c662005854a47c48128c479b0a)

### Which was updated more recently, cal.diy or postiz-app?

postiz-app: its last push was on October 31, 2026, and cal.diy's on October 29, 2026.

The proof: [gitroomhq/postiz-app's commits on GitHub](https://github.com/gitroomhq/postiz-app/commits)

### Which has more commits signed by AI, cal.diy or postiz-app?

postiz-app: an AI signed 11.5% of its commits, with Claude Code and GitHub Copilot; in cal.diy, 6.3%.

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

## Sources

- calcom/cal.diy: Read on October 30, 2026, at commit 2e41247 (https://github.com/calcom/cal.diy/tree/2e412471fc1f42c662005854a47c48128c479b0a)
- gitroomhq/postiz-app: Read on October 31, 2026, at commit be5900f (https://github.com/gitroomhq/postiz-app/tree/be5900f78a366954bccbbefa3e2244be4463a2b4)

## 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.