---
title: "Cowboy"
pageType: "tool-profile"
schemaVersion: "1.0"
snapshotId: "tv-20260915-f4c107995a2e"
generatedAt: "2026-09-15T07:02:20.000Z"
canonicalUrl: "http://toolvitals.com/tools/cowboy/"
jsonUrl: "http://toolvitals.com/api/agent/tools/cowboy"
indexable: true
---

# Cowboy

Open-source Erlang HTTP server for building web services.

## Decision context

- Status: active
- ToolVitals score: 73/100
- Health score: 76/100
- Shipping score: 68/100
- Score mode: verdict
- Data confidence: 90/100
- Source coverage: 80/100
- Last evidence check: 2026-09-14

## Classification

- Use case: Web Frameworks (web-frameworks)
- Category: Frameworks & Libraries (frameworks)
- Tool mode: Library Framework
- Openness: OSI-approved OSS
- License: ISC
- Tags: erlang, http-server, web-framework, backend, open-source, cowboy, functional, high-performance, http, http2, http2-server, http3, http3-server, https, production-ready, rest

## Public repository signals

- Repository: [ninenines/cowboy](https://github.com/ninenines/cowboy)
- Stars: 7525 (adoption context only)
- Forks: 1171
- Open issues: 65
- Last commit date: 2026-09-09
- Releases in 90 days: 0

## Source receipts

- [Official website](https://ninenines.eu/) — checked 2026-09-14
- [Source repository](https://github.com/ninenines/cowboy) — checked 2026-09-14

## Discovery status

- Search indexable: yes
- Reason: sufficient tool evidence

## Interpretation limits

- ToolVitals scores summarize bounded public maintenance, shipping, openness, and evidence signals. They are not user-review ratings.
- GitHub stars and related popularity metrics are adoption context, not quality evidence.
- Missing values mean not collected or not confidently established; they do not mean zero.
- Public signals do not prove security, uptime, support quality, customer satisfaction, or production suitability.
- Verify material decisions against the linked first-party sources and your own requirements.