Klaviyo

Klaviyo is a marketing automation platform for email, SMS and other channels, built primarily for e-commerce brands. It combines customer data from online stores with tools to segment audiences, automate personalised messages and measure revenue generated by each campaign. Its defining strength is data. Klaviyo integrates deeply with platforms such as Shopify, WooCommerce, BigCommerce and Magento, syncing every customer's browsing behaviour, orders, products viewed, cart contents and lifetime value in near real time. Marketers can build segments such as "bought twice but not in the last 90 days" or "viewed a product in this category but did not buy" and send precisely targeted messages, which tends to outperform generic newsletters for online stores. Automated flows are where much of its revenue impact comes from: welcome series, abandoned cart and browse abandonment reminders, post-purchase follow-ups, replenishment reminders, win-back campaigns and back-in-stock alerts. Predictive analytics estimate each customer's next order date, likely lifetime value and churn risk, and AI features help write content, build segments and optimise send times. Klaviyo has broadened into SMS, push notifications, reviews, customer service tools and a customer data platform, positioning itself as a full B2C marketing system. The company is publicly listed. Klaviyo offers a free plan for small lists and paid plans priced by number of active profiles and messages, which can become expensive as a list grows. Its depth also brings a learning curve, and its value is clearest for e-commerce rather than for B2B companies or simple newsletters. Alternatives include Omnisend for e-commerce email and SMS at lower cost; Mailchimp for general small-business marketing; Attentive and Postscript for SMS-focused marketing; Braze and Iterable for enterprise cross-channel engagement; Drip for e-commerce automation; and Shopify Email for basic, built-in campaigns. Choose Klaviyo when you run an online store and want data-driven email and SMS automation that drives measurable revenue.