Hotjar captures user behavior: heatmaps, recordings, surveys, feedback widgets. StoreVitals captures site health: broken links, security headers, performance, accessibility. Both useful, different jobs.
Hotjar and StoreVitals are complementary, not competitive. Hotjar tells you what users are doing and where they get stuck. StoreVitals tells you what's technically wrong with the site that's making them leave. A serious ecommerce store should run both: Hotjar for UX and conversion optimization, StoreVitals for site health monitoring. They don't overlap, and trying to replace one with the other leaves blind spots.