Google PageSpeed Insights is the free, official tool for measuring Core Web Vitals (LCP, INP, CLS) on a single URL. StoreVitals monitors entire ecommerce sites continuously across SEO, security, performance, and accessibility — including Page Experience signals.
PageSpeed Insights and StoreVitals serve different workflows. PageSpeed Insights is the official, free, ad-hoc tool for measuring Core Web Vitals on a single URL — used during performance debugging, before/after deploys, or when investigating a specific page. StoreVitals is the continuous monitoring layer that watches your entire ecommerce site for regressions across performance, SEO, security, and accessibility — including Page Experience signals that PageSpeed Insights doesn't fully cover (interstitials, mobile viewport, font display, image dimensions for CLS). Most ecommerce stores use PageSpeed Insights for tactical debugging and StoreVitals for the always-on monitoring discipline that catches regressions before they hurt rankings. The free <a href='/tools/web-vitals'>Web Vitals Checker</a> on StoreVitals provides a similar single-URL audit if you want both workflows in one tool.