Klaviyo is the best in class email marketing solution for eCommerce. It's powerful because it connects to your store, and you can create awesome customer segments based on past purchasing behaviors, customer preferences, and even future predictions of spending.

Omnisend is an omnichannel marketing automation platform for ecommerce businesses. Omnisend allows you to add several channels to the same automation workflow for seamless communication via email, SMS, web push notifications, and more.

Loop Subscriptions offers a suite of unique tools for D2C brands to optimize and scale their subscription experiences. Their features include Loop Flows for personalized subscription journeys, Cancellation Flows to mitigate churn, and a gamification system to enhance subscriber engagement. They also provide detailed analytics, smart dunning management, and a customizable customer portal to keep subscribers engaged while offering insights to businesses.

Skio helps brands on Shopify sell subscriptions without ripping their hair out. Leverages Shopify's native checkout & also uses passwordless login for customers to edit their subscription.

Recharge is the leading Shopify subscription solution for online businesses. It makes it easy to transform one-time products into subscription options.