What Do You Use?

Ever land on a competitor's site and wonder what's powering their marketing stack? WDYU gives you the answer. Open the extension on any website and instantly see every marketing tool, analytics platform, ad pixel, and tech integration they're running — organised by category, no tab-switching required. What it detects: - Advertising and tracking tools (e.g. major ad pixels and networks) - Analytics and product tracking platforms - Tag management systems - CRM and email marketing tools - Chat and customer support widgets - A/B testing and optimization tools - Monitoring and performance services - Consent and cookie management solutions - E-commerce integrations - CMS and website platforms Plus: Unknown Script Detection If a page loads a third-party script that isn't in our database, we surface it — flagging anything that looks like a tracker so nothing hides in plain sight. WDYU is built for marketers, growth teams, and agency folks who want one specific answer fast: what's their marketing stack? ✅ One click, results in under a second ✅ Detects dynamically loaded scripts (GTM-injected pixels included) ✅ 1,800+ tools in the database ✅ Completely free ✅ 100% private — nothing leaves your browser