GTmetrix is a performance testing tool that measures page load speed, Core Web Vitals, and provides optimization recommendations. StoreVitals covers the full picture — security, SEO, accessibility, content quality, and performance — with automated monitoring and email alerts.
GTmetrix is the right tool if page load speed is your primary focus and you need deep performance diagnostics. StoreVitals is the better fit if you want continuous health monitoring across your entire store — covering security, SEO, accessibility, and content quality alongside performance.