Find advertisers who can't follow up.
Close them.
ProofStack scrapes businesses that spend money on ads, mystery-shops their lead funnel, and writes the cold email that lands the meeting. Audit-grade proof, not pitch decks.
Discover
Google Maps + Apollo + SpyFu + Meta Ad Library. Find businesses spending real money on ads.
Mystery shop
Submit forms, send DMs, track callbacks. Score every prospect's follow-up speed before you pitch.
Personalize
Claude writes the opening line using actual audit data: their ad spend, their callback time, what their rep said.