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

# sitespeed.io

sitespeed.io is an open-source tool for comprehensive web performance analysis, enabling you to test, monitor, and optimize your website’s speed using real browsers in various environments.

## Decision context

- Status: active
- ToolVitals score: 79/100
- Health score: 81/100
- Shipping score: 77/100
- Score mode: verdict
- Data confidence: 90/100
- Source coverage: 100/100
- Last evidence check: 2026-09-14

## Classification

- Use case: Observability (observability)
- Category: Monitoring (monitoring)
- Tool mode: Source-visible project
- Openness: OSI-approved OSS
- License: MIT
- Tags: open-source, metrics, monitoring, perfmatters, performance-analysis, performance-dashboard, performance-metrics, sitespeed, web, webperf, web-performance, real-browser-testing

## Public repository signals

- Repository: [sitespeedio/sitespeed.io](https://github.com/sitespeedio/sitespeed.io)
- Stars: 5028 (adoption context only)
- Forks: 625
- Open issues: 157
- Last commit date: 2026-09-11
- Releases in 90 days: 13

## Source receipts

- [Official website](https://sitespeed.io/) — checked 2026-09-14
- [Source repository](https://github.com/sitespeedio/sitespeed.io) — 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.