Lead Generation
Build lists by stack + intent. Find "ready for pitch" targets. Ship campaigns this afternoon.
The old way is broken
You're building lists manually. Checking websites one by one. Guessing at tech stacks.
Your ICP is "companies using X but not Y" — but there's no easy way to find them.
By the time you've built a list, the data is stale.
Find leads by stack and signal
What-Stack gives you instant access to millions of websites, filtered by the technologies they use. Every lead includes the "why."
Stack Filtering
"Shopify stores using Yotpo but no Klaviyo" — queries like this take seconds.
Intent Signals
High product count, recent tech changes, traffic indicators — signals that predict fit.
Evidence-Backed
Every detection includes reason codes. Know exactly why a site matched.
Fresh Data
Monthly crawl updates. Never work with stale lists again.
Example segments that convert
Built for outbound operators
SDR/BDR Teams
Build hyper-targeted lists. Personalize outreach with stack context.
Growth Operators
Test segments fast. Iterate on what converts.
Agencies
Reusable segment packs for consistent pipeline.