Klaviyo

Klaviyo is a marketing platform with a strong focus on ecommerce customer data. Integrations with platforms such as Shopify, Magento and BigCommerce allow purchase activity and other available customer information to inform email and SMS campaigns. Segmentation helps merchants tailor messages to different groups rather than treating the entire audience as one mailing list. Its visual flow builder supports automated journeys, such as messages associated with shopping activity or follow-up communication after a purchase.

Purchase history and browsing behavior can help shape those flows when the relevant data is available, while reporting supports evaluation of campaign results. Klaviyo suits ecommerce teams that want marketing closely connected to their store's customer records. That connection is its defining strength, although effective use depends on sound data and thoughtful messages. The platform is commercial hosted software, not an open-source product.