Source: https://seerepo.com/compare/calcom/cal.diy/vs/QuantumNous/new-api
Markdown source: https://seerepo.com/compare/calcom/cal.diy/vs/QuantumNous/new-api.md
Description: cal.diy and new-api share 3 technologies: Postgres, Redis, and Stripe. cal.diy is written in TypeScript and new-api in Go.

# cal.diy vs new-api

cal.diy and new-api share 3 technologies: Postgres, Redis, and Stripe. cal.diy is written in TypeScript and new-api in Go.

- [calcom/cal.diy](https://seerepo.com/r/calcom/cal.diy): Scheduling infrastructure for absolutely everyone.
- [QuantumNous/new-api](https://seerepo.com/r/QuantumNous/new-api): Open-source AI gateway. Self-hosted LLM gateway with OpenAI-, Claude- and Gemini-compatible APIs, model routing, access control, usage tracking and cost accounting.

## What they share and what sets them apart

- In common: Postgres, Redis, Stripe
- Only in cal.diy: Next.js, React, Sentry, PostHog, Google
- Only in new-api: Gin

## Side by side

| | cal.diy | new-api |
|---|---|---|
| Size | 554,251 lines written, 4,310 code files | 564,057 lines written, 1,971 code files |
| Who writes it | 6.3% of its commits signed by AI. With Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot | 0.7% of its commits signed by AI. With Claude Code, CodeRabbit, Codex, Jules, and Cursor |
| Activity | Last push October 27, 2026, 16,059 commits, 49,471 stars | Last push October 28, 2026, 5,382 commits, 50,869 stars |
| Tests | 641 test files. 14.7% of its code files have a test that imports them | 505 test files. 39.2% 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 new-api?

new-api, with 564,057 lines written in 1,971 code files; cal.diy has 554,251 in 4,310.

The proof: [QuantumNous/new-api's code at commit e449cc7](https://github.com/QuantumNous/new-api/tree/e449cc700eb569cdfc2199cb73e97de46944f43c)

### Which has more GitHub stars, cal.diy or new-api?

new-api, with 50,869 stars; cal.diy has 49,471.

The proof: [QuantumNous/new-api on GitHub](https://github.com/QuantumNous/new-api)

### Which has more tests, cal.diy or new-api?

cal.diy, with 641 test files; new-api has 505.

The proof: [calcom/cal.diy's code at commit 56da01b](https://github.com/calcom/cal.diy/tree/56da01b4b1664894b784aca636eccab0c56cc141)

### Which was updated more recently, cal.diy or new-api?

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

The proof: [QuantumNous/new-api's commits on GitHub](https://github.com/QuantumNous/new-api/commits)

### Which has more commits signed by AI, cal.diy or new-api?

cal.diy: an AI signed 6.3% of its commits, with Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot; in new-api, 0.7%.

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)
- QuantumNous/new-api: Read on October 28, 2026, at commit e449cc7 (https://github.com/QuantumNous/new-api/tree/e449cc700eb569cdfc2199cb73e97de46944f43c)

## 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.