Retainful
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Retainful is an ecommerce marketing automation platform that works natively with Shopify and WooCommerce, combining email, SMS, and WhatsApp messaging. It specializes in revenue-recovery workflows like abandoned cart sequences, post-purchase follow-ups, and win-back campaigns. The platform includes pre-built flows that you can customize or run as-is.
Retainful is built for online store owners focused on immediate revenue recovery and repeat purchases. Compared to Klaviyo, it's more niche-focused on ecommerce automation and simpler to set up for smaller stores. It's especially useful if WhatsApp messaging is important to your customer base or if you want a tighter integration with WooCommerce.