In 2012, Klaviyo co-founders Andrew Bialecki and Ed Hallen saw a pattern. Companies had loads of data but couldn’t answer basic questions about their customers, let alone use that data to drive revenue through personalized marketing.

The tech to unite data, analytics, and marketing didn’t exist. So they built it. Today over 151,000 of the world’s most notable brands use Klaviyo’s email and SMS marketing platform.