Klaviyo

Klaviyo is ecommerce marketing automation on customer profiles: email, SMS and push flows, segments, forms and reviews, with a free plan for small stores.

Klaviyo is a marketing automation platform built for online stores. Everything hangs off a customer profile that the store integration and the onsite tracking script keep current: orders, products viewed, carts, email and SMS engagement and custom properties. It is made by Klaviyo, Inc., a Boston company founded in 2012 that now positions the platform as a CRM for consumer brands. Flows, the vendor's word for automations, start from profile events and branch through trigger and conditional splits into email, SMS and MMS, WhatsApp, RCS and mobile push steps, with more than 80 pre-built flows for abandoned cart, browse abandonment, welcome, post-purchase and price drop. Campaigns are built in a drag-and-drop email editor with a template library, segmentation works on any profile data, and signup forms and popups grow the list. A/B testing runs in campaigns and flow emails, Smart Send Time picks the hour for large sends, predictive analytics forecast lifetime value and churn, and personalized product recommendations fill the email. Onsite tracking records Active on Site and Viewed Product events, mobile push ships with iOS, Android and React Native SDKs, and transactional messages run inside metric-triggered flows. Around the core sit product reviews, a Customer Hub self-service portal, a helpdesk with a shared inbox, Marketing Analytics with RFM, an advanced customer data platform, the Composer AI marketing agent and generative AI for content, segments and flows, plus peer group benchmarks, revenue attribution reporting, webhooks in flows, more than 350 integrations and a REST API with Python, PHP, Ruby and Node SDKs. Klaviyo suits ecommerce brands on Shopify, WooCommerce, BigCommerce or Wix, stores that want email and SMS on one customer profile, small stores starting on the free plan, marketers who segment on purchase and browsing behavior, brands with their own mobile app and direct-to-consumer brands measuring revenue per flow. It is priced by active profiles rather than users or features: a free plan for the smallest stores, then email plans by profile band billed monthly, mobile messaging prepaid and billed per send, Reviews as an add-on, and the analytics, data platform, AI agent and service products priced on top, with Enterprise quoted. The plan cards list every tier. In daily use Klaviyo runs the abandoned cart and browse abandonment flows, the welcome series with a signup discount, the post-purchase and win-back flows, price drop and back-in-stock alerts, review requests after delivery, campaigns segmented by predicted lifetime value and SMS promotions with consent capture. It reads orders from the store and pushes revenue back into its reports, so it sits beside the store platform and a brand's own app rather than replacing them.