Klaviyo

Klaviyo specializes in email and SMS for e-commerce, with native integrations for Shopify, WooCommerce, and Magento. Agencies running campaigns for online store clients find the platform built specifically for that use case. It pulls purchase data, browsing history, and customer segments directly from store platforms.

The strength lies in e-commerce-specific features like product recommendations and post-purchase automations. Agencies can build complex customer journeys based on store behavior and purchase history. Revenue attribution and performance analytics help justify email marketing spend to store owner clients.