Klaviyo

What is Klaviyo?

Klaviyo is a B2C customer relationship management platform that combines email marketing, SMS messaging, and omnichannel automation built for ecommerce and subscription brands. The platform serves as the default choice for Shopify-scale merchants seeking behavioral campaign automation and customer data management at scale.

The core offering includes email and SMS campaign builders with AI-powered features like Composer, an agent that generates on-brand campaigns from text prompts, and Marketing Agent, which learns from a brand's website to build campaigns, flows, and forms automatically. Klaviyo's Customer Agent handles support inquiries and sales recommendations, resolving approximately 65% of customer questions without human intervention. The platform supports messaging across email, SMS, RCS (Rich Communication Services), WhatsApp, mobile push notifications, and social channels, all unified through a single customer data platform. Klaviyo Data Platform enables behavioral segmentation, audience targeting based on customer actions, and integration with 350+ third-party applications including Shopify, payment processors, shipping providers, loyalty systems, and advertising platforms.

The service operates on a subscription pricing model tied to contact count and feature tier, with usage-based SMS billing and free tiers available for smaller merchants. Enterprise packages include dedicated support and professional services. Klaviyo's developer ecosystem provides APIs and webhooks for custom integrations, while the company maintains a marketplace of certified apps and integrations built by partners. The platform serves over 196,000 brands across more than 100 countries, with particular strength in retail ecommerce, wellness, and restaurant marketing verticals.

Additional resources include onboarding support, an academy for training, community forums, analytics dashboards with ROI calculators, and K:BOS, the company's annual conference. Competitors in the b