Source: https://seerepo.com/compare/calcom/cal.diy/vs/HumanSignal/label-studio
Markdown source: https://seerepo.com/compare/calcom/cal.diy/vs/HumanSignal/label-studio.md
Description: cal.diy and label-studio share 5 technologies: React, Postgres, Redis, Sentry, and Google. Both are written in TypeScript.

# cal.diy vs label-studio

cal.diy and label-studio share 5 technologies: React, Postgres, Redis, Sentry, and Google. Both are written in TypeScript.

- [calcom/cal.diy](https://seerepo.com/r/calcom/cal.diy): Scheduling infrastructure for absolutely everyone.
- [HumanSignal/label-studio](https://seerepo.com/r/HumanSignal/label-studio): Label Studio is a multi-type data labeling and annotation tool with standardized output format

## What they share and what sets them apart

- In common: React, Postgres, Redis, Sentry, Google
- Only in cal.diy: Next.js, PostHog, Stripe
- Only in label-studio: Vite, Django

## Side by side

| | cal.diy | label-studio |
|---|---|---|
| Size | 554,284 lines written, 4,310 code files | 439,850 lines written, 1,627 code files |
| Who writes it | 6.3% of its commits signed by AI. With Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot | 1.1% of its commits signed by AI. With Claude Code, Cursor, and GitHub Copilot |
| Activity | Last push October 29, 2026, 16,062 commits, 49,552 stars | Last push November 2, 2026, 7,362 commits, 28,614 stars |
| Tests | 642 test files. 14.8% of its code files have a test that imports them | 744 test files. 32.2% 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 label-studio?

cal.diy, with 554,284 lines written in 4,310 code files; label-studio has 439,850 in 1,627.

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 label-studio?

cal.diy, with 49,552 stars; label-studio has 28,614.

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

### Which has more tests, cal.diy or label-studio?

label-studio, with 744 test files; cal.diy has 642.

The proof: [HumanSignal/label-studio's code at commit 60b7f98](https://github.com/HumanSignal/label-studio/tree/60b7f987b7c09ae65705fafbbee108091dbf1ff2)

### Which was updated more recently, cal.diy or label-studio?

label-studio: its last push was on November 2, 2026, and cal.diy's on October 29, 2026.

The proof: [HumanSignal/label-studio's commits on GitHub](https://github.com/HumanSignal/label-studio/commits)

### Which has more commits signed by AI, cal.diy or label-studio?

cal.diy: an AI signed 6.3% of its commits, with Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot; in label-studio, 1.1%.

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 October 30, 2026, at commit 2e41247 (https://github.com/calcom/cal.diy/tree/2e412471fc1f42c662005854a47c48128c479b0a)
- HumanSignal/label-studio: Read on November 2, 2026, at commit 60b7f98 (https://github.com/HumanSignal/label-studio/tree/60b7f987b7c09ae65705fafbbee108091dbf1ff2)

## 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.