Finally. A unified customer platform that delivers personalization at scale.

Klaviyo One unlocks all your customer data so you can create rich personalized experiences with best-in-class email and SMS—bringing customers back again (and again).

Trusted by over 1.2K leading brands

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Drive more revenue with a unified customer platform

Fragmented point solutions prevent marketers from building effective customer communications.  Klaviyo One solves this by bringing all your customers’ data on to one customer data platform—where you can fuel highly personalized messages at scale.

average ROI
or faster to query real-time profile data*
daily segment evaluations
events processed per day

Forget legacy software. Klaviyo One is built for the future.

Scale without limits

Deliver personalized experiences and manage as much data as you need, no matter how big your audience gets.

Protect your brand

Expert compliance considerations handle critical details for you. High deliverability and low latency maintain your sending reputation.

Integrate with any stack

No more siloed data. Manage and use it all in one place with 300+ ready-to-go integrations and even more flexibility to connect with custom platforms.

Empower developers

Klaviyo’s versatile APIs, precise documentation, and supportive community forum equip your team to build custom integrations in less time.
agency partners
tech partners
organizations use Klaviyo APIs on a weekly basis
API requests processed per week

Success at every step

Klaviyo experts are ready to guide you through onboarding, integration, deliverability, and beyond, and you’ll get ongoing support from a customer success manager. Plus, our extensive network of agency and tech partners puts even more specialized teams at your fingertips.

Speed meets sophistication

Klaviyo is so intuitive and easy to use, even for advanced campaigns. It’s eliminated inefficiencies that existed with our previous marketing platform and has allowed easier collaboration, saving us time and making our marketing campaigns even more impactful.
–Lindy Rich, VP of marketing, Stance