Dareboost is a web quality auditing platform with performance, SEO, and accessibility checks. StoreVitals focuses specifically on ecommerce stores with 20 health checks tuned for Shopify, WooCommerce, and other platforms.
Dareboost is a serious performance/quality tool for teams with performance engineers. StoreVitals is for ecommerce operators, agencies, and small-to-midsize stores who want their whole store audited weekly and get recommendations phrased in the language of their platform. If you're running Shopify and want a tool that says 'your Image_Tag Liquid snippet is serving unoptimized images,' that's StoreVitals. If you have a performance engineer who wants filmstrips across four global locations, that's Dareboost.