Google Page InsightToolMeasure page performance for mobile and desktop PricingFree tier DeploymentCloud APIAvailableStartupToolbox·Jun 30, 2026Google PageSpeed Insights evaluates web page performance using Lighthouse lab data and real-world Chrome UX Report field data, then suggests improvements for speed, accessibility, and SEO.Alternative toGTmetrix|WWebPageTest|LLighthouse
GTMetrixToolWebsite speed and performance testing and monitoring PricingFree tier DeploymentCloud APIAvailableStartupToolbox·Jun 30, 2026GTmetrix analyzes website loading speed and performance, providing diagnostic reports, waterfall charts, and ongoing monitoring from over 30 global test locations.Alternative toWWebPageTest|PIPageSpeed Insights|DDebugBear
LighthouseToolAutomated web page quality auditing tool Stars30.5K Forks9.7K Last commitJun 29, 2026StartupToolbox·Jun 30, 2026Lighthouse is an open-source, automated tool from Google that audits web pages for performance, accessibility, SEO, and best practices. It generates reports with actionable recommendations and runs in Chrome DevTools, the CLI, a Node module, or PageSpeed Insights.Alternative toPIPageSpeed Insights|WWebPageTest|GTmetrix