About us

143,000+ companies use Klaviyo’s data-driven marketing tools to connect with their customers and grow on their own terms

Unified customer platform

Our platform unifies all customer data and channels in one place, delivers unprecedented speed and time to value, and is built to be intuitive and easy to use so that every brand—regardless of size and expertise—can connect with their valued customers to grow more profitably and sustainably on their own terms.

How it started

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 personalised marketing.

The tech to unite data, analytics, and marketing didn’t exist. So they built it. Today over 143,000 of the world’s most notable brands use Klaviyo’s email and SMS marketing platform.

“Klaviyo provides the tools and playbooks for any creator to have more control, more ownership. It doesn’t matter if you create products, services, or content—or some of each. We believe the best products and creations can and should win.”

—Andrew Bialecki, Klaviyo co-founder

paying customers in 80+ countries
$100 billion
revenue earned by Klaviyo users to date
employees worldwide
$2.2 billion
revenue driven by Klaviyo during BFCM 2022



What’s with the name?

Klaviyo (clay-vee-oh) is inspired by “clavija”, a Spanish word for mountaineering pins—also called pitons. These pitons support climbers as they ascend, and catch them if they fall.

We liken our customers to mountaineers. Our goal is to support and accelerate their climb to the summit.