Wappalyzer is the original tech stack identifier — a free browser extension and paid lookup API that detects the technologies running on any website. StoreVitals provides similar detection plus continuous ecommerce health monitoring on top.
Wappalyzer's free browser extension is the right tool for 'what is this site running, right now?' — open the site, click the extension, get the answer. StoreVitals is the right tool for 'what is the health of this store, over time?' — including tech stack detection but adding 30+ other ecommerce-specific checks with continuous monitoring. Wappalyzer's a Swiss army knife for tech curiosity. StoreVitals is a continuous-monitoring layer for stores you actually care about. Both have free tiers worth keeping.