WooCommerce

HubSpot is an award-winning inbound sales, marketing, service, and CRM platform, that helps businesses implement inbound in their businesses. It's used across all industries, but for eCommerce it's typically integrated with WooCommerce.

ActiveCampaign's platform gives businesses of all sizes access to hundreds of pre-built automations that combine email marketing, marketing automation, CRM, and machine learning for powerful segmentation and personalization across social, email, messaging, chat, and text.

With Mailchimp you can send newsletters and automated emails. You can build your email list with form or import your known contacts. Mailchimp offers pre-designed email templates and a drag and drop email builder.

Text based marketing for eCommerce stores. Attentive is used mainly as a way to promote offers via SMS, or otherwise used for abandoned carts or to promote retention. Attentive also directly integrates with eCommerce platforms such as Shopify.

Amplitude is one of the most advanced product analytics platforms that helps teams convert, engage, and retain customers. The platform uses behavioral reports to understand users' interactions with products and provides insights to accelerate work on a real-time basis.