Source: https://seerepo.com/compare/calcom/cal.diy/vs/langgenius/dify
Markdown source: https://seerepo.com/compare/calcom/cal.diy/vs/langgenius/dify.md
Description: cal.diy and dify share 5 technologies: Next.js, React, Postgres, Redis, and Sentry. cal.diy is written in TypeScript and dify in Python.

# cal.diy vs dify

cal.diy and dify share 5 technologies: Next.js, React, Postgres, Redis, and Sentry. cal.diy is written in TypeScript and dify in Python.

- [calcom/cal.diy](https://seerepo.com/r/calcom/cal.diy): Scheduling infrastructure for absolutely everyone.
- [langgenius/dify](https://seerepo.com/r/langgenius/dify): Build Agentic workflows, RAG pipelines, with rich AI model and tool support on one collaborative workspace. Deploy on cloud, VPC, or self-hosted, so teams move from prototype to production without rebuilding the stack.

## What they share and what sets them apart

- In common: Next.js, React, Postgres, Redis, Sentry
- Only in cal.diy: PostHog, Google, Stripe
- Only in dify: Flask, net/http, Resend

## Side by side

| | cal.diy | dify |
|---|---|---|
| Size | 554,251 lines written, 4,310 code files | 2,246,004 lines written, 6,486 code files |
| Who writes it | 6.3% of its commits signed by AI. With Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot | 5.1% of its commits signed by AI. With GitHub Copilot, Claude Code, Gemini CLI, Codex, Jules, Devin, Cursor, and Warp |
| Activity | Last push October 27, 2026, 16,059 commits, 49,471 stars | Last push October 28, 2026, 14,547 commits, 159,837 stars |
| Tests | 641 test files. 14.7% of its code files have a test that imports them | 4,485 test files. 65.5% 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 dify?

dify, with 2,246,004 lines written in 6,486 code files; cal.diy has 554,251 in 4,310.

The proof: [langgenius/dify's code at commit ea5e4e9](https://github.com/langgenius/dify/tree/ea5e4e9e21e73a8b7406e2d678350a2dd33b8fa0)

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

dify, with 159,837 stars; cal.diy has 49,471.

The proof: [langgenius/dify on GitHub](https://github.com/langgenius/dify)

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

dify, with 4,485 test files; cal.diy has 641.

The proof: [langgenius/dify's code at commit ea5e4e9](https://github.com/langgenius/dify/tree/ea5e4e9e21e73a8b7406e2d678350a2dd33b8fa0)

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

dify: its last push was on October 28, 2026, and cal.diy's on October 27, 2026.

The proof: [langgenius/dify's commits on GitHub](https://github.com/langgenius/dify/commits)

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

cal.diy: an AI signed 6.3% of its commits, with Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot; in dify, 5.1%.

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 28, 2026, at commit 56da01b (https://github.com/calcom/cal.diy/tree/56da01b4b1664894b784aca636eccab0c56cc141)
- langgenius/dify: Read on October 28, 2026, at commit ea5e4e9 (https://github.com/langgenius/dify/tree/ea5e4e9e21e73a8b7406e2d678350a2dd33b8fa0)

## 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.