Klaviyo started as an email tool for online stores and now calls itself a B2C CRM. It keeps one profile for each customer, built from what that person browsed, bought, opened, and clicked, and it uses that profile to decide who gets which message on which channel. Klaviyo reports more than 205,000 brands on the platform and more than 350 prebuilt integrations.
It has three parts. Marketing covers email, SMS, RCS, WhatsApp, mobile push, signup forms, and reviews. Data covers the customer profiles, segmentation, and analytics underneath. Service, the newest part, adds a customer hub, a helpdesk, and an AI agent that answers shoppers.
What makes it suit eCommerce is the data model. Every event a store sends, such as a product view, a started checkout, an order, or a refund, can start a message or narrow an audience. The picture shows the idea: a segment of people who viewed a product in the last 30 days, and the reminder they receive.