WhoSignup — Never miss a high-value signup again
WhoSignup helps SaaS founders and marketers get instant alerts when valuable companies sign up for their product.
Instead of manually checking dashboards or filtering out low-quality signups, WhoSignup enriches each signup with company data (size, industry, domain authority) and notifies you only when it matches your ideal customer profile.
How it works:
Send signup data to WhoSignup via a simple REST API
The tool enriches it with company information
Define smart rules (e.g. “notify me if company has 50+ employees” or “domain authority > 60”)
Get instant email notifications when those signups happen
Why use it:
Stop missing enterprise or high-value leads
React fast and send personal follow-ups
Set up in minutes with a simple API
