Source: https://seerepo.com/compare/calcom/cal.diy/vs/SigNoz/signoz
Markdown source: https://seerepo.com/compare/calcom/cal.diy/vs/SigNoz/signoz.md
Description: cal.diy and signoz share 6 technologies: React, Postgres, Redis, Sentry, PostHog, and Google. cal.diy is written in TypeScript and signoz in Go.

# cal.diy vs signoz

cal.diy and signoz share 6 technologies: React, Postgres, Redis, Sentry, PostHog, and Google. cal.diy is written in TypeScript and signoz in Go.

- [calcom/cal.diy](https://seerepo.com/r/calcom/cal.diy): Scheduling infrastructure for absolutely everyone.
- [SigNoz/signoz](https://seerepo.com/r/SigNoz/signoz): SigNoz is an open-source, OpenTelemetry-native observability platform for your team and their AI agents. Get logs, metrics, and traces in one tool with features like APM, distributed tracing, log management, infra monitoring, etc. Combined with SigNoz MCP and a native AI teammate (in SigNoz Cloud) it helps you build more resilient apps.

## What they share and what sets them apart

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

## Side by side

| | cal.diy | signoz |
|---|---|---|
| Size | 554,284 lines written, 4,310 code files | 1,090,543 lines written, 4,718 code files |
| Who writes it | 6.3% of its commits signed by AI. With Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot | 1.2% of its commits signed by AI. With Claude Code, GitHub Copilot, and Cursor |
| Activity | Last push October 29, 2026, 16,062 commits, 49,552 stars | Last push November 1, 2026, 6,568 commits, 32,495 stars |
| Tests | 642 test files. 14.8% of its code files have a test that imports them | 1,865 test files. 36.4% 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 signoz?

signoz, with 1,090,543 lines written in 4,718 code files; cal.diy has 554,284 in 4,310.

The proof: [SigNoz/signoz's code at commit a621fb2](https://github.com/SigNoz/signoz/tree/a621fb2b49acd8ee352eb61ba2976bd34afdf402)

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

cal.diy, with 49,552 stars; signoz has 32,495.

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

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

signoz, with 1,865 test files; cal.diy has 642.

The proof: [SigNoz/signoz's code at commit a621fb2](https://github.com/SigNoz/signoz/tree/a621fb2b49acd8ee352eb61ba2976bd34afdf402)

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

signoz: its last push was on November 1, 2026, and cal.diy's on October 29, 2026.

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

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

cal.diy: an AI signed 6.3% of its commits, with Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot; in signoz, 1.2%.

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)
- SigNoz/signoz: Read on November 1, 2026, at commit a621fb2 (https://github.com/SigNoz/signoz/tree/a621fb2b49acd8ee352eb61ba2976bd34afdf402)

## 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.