Tool category
Page Speed
Performance tooling for Core Web Vitals — lab testing, real-user monitoring, and regression alerting.
15 tools · 12 free or with a free tier · 4 more cover this area as a secondary feature
| Tool | What it does | Pricing | From | HQ |
|---|---|---|---|---|
| Calibre calibreapp.com | Site speed monitoring service running scheduled Lighthouse tests, tracking Core Web Vitals and real user data with budgets and CI integration. | Paid | $75 | Australia |
| CrUX Dashboard developer.chrome.com | Free Looker Studio template built on the public Chrome UX Report BigQuery dataset, charting a site's monthly Core Web Vitals field data. | Free | — | United States |
| DebugBear debugbear.com | Website speed monitoring platform combining synthetic Lighthouse tests, real user monitoring and third-party script analysis with alerting and CI checks. | Paid | — | United Kingdom |
| GTmetrix gtmetrix.com | Page performance testing service reporting Lighthouse-based scores, waterfall charts and video playback of page loads, with scheduled monitoring on paid plans. | Freemium | — | Canada |
| Lighthouse developer.chrome.com | Open-source auditing tool built into Chrome DevTools and available as a CLI and Node module, scoring performance, accessibility, best practices and SEO. | Open Source | — | United States |
| Lighthouse CI github.com | Open-source tooling from the Google Chrome team that runs Lighthouse on every commit, stores the results, compares them between builds and fails CI when performance, accessibility or SEO scores regress. | Open Source | — | United States |
| Lighthouse MCP Server github.com | Open-source MCP server that lets AI agents run Google Lighthouse audits, exposing tools for performance, accessibility, SEO and security analysis of a given URL. | Open Source | — | — |
| PageSpeed Insights pagespeed.web.dev | Google's free page performance tool combining Lighthouse lab diagnostics with field data from the Chrome UX Report, reporting Core Web Vitals for a URL or origin. | Free | — | United States |
| Pingdom pingdom.com | Uptime and performance monitoring service with synthetic page speed tests and real user monitoring, part of SolarWinds. | Paid | — | Sweden |
| sitespeed.io sitespeed.io | Open-source web performance toolset that tests pages in real browsers and produces HTML reports with Core Web Vitals, filmstrip video, HAR waterfalls and best-practice advice from the Coach. Includes Browsertime, PageXray and Compare. | Open Source | — | — |
| SpeedCurve speedcurve.com | Web performance monitoring platform combining synthetic testing and real user monitoring with dashboards linking speed metrics to business outcomes. | Paid | $90 | New Zealand |
| Treo treo.sh | Site speed monitoring service built on Chrome UX Report field data, tracking Core Web Vitals over time for a site and its competitors. | Freemium | — | — |
| Unlighthouse unlighthouse.dev | Free MIT-licensed CLI that auto-discovers a site's URLs, crawls them in parallel and runs Google Lighthouse on every page, producing one unified performance, accessibility and SEO report. | Open Source | — | — |
| web-vitals (JavaScript library) github.com | Open-source JavaScript library from the Google Chrome team for measuring Core Web Vitals and other field metrics in real user sessions and reporting them to any analytics endpoint. | Open Source | — | United States |
| WebPageTest webpagetest.org | Web performance testing service offering detailed waterfall charts, filmstrips and Core Web Vitals measurements from many real locations, browsers and connection profiles. | Freemium | — | United States |
2 of 15 vendors in this category publish a starting price. Where the column is empty, the vendor quotes on request or the price was not published at the time of compilation.
Also covers page speed
These tools are catalogued under another primary category but include page speed functionality.
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