POWr

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.

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.

Shopify

Shopify is a commerce platform that allows anyone to set up an online store and sell their products. It's the go-to eCommerce platform for young direct-to-consumer brands. It's ease of use and setup is what's most attractive to merchants, but also the incredibly vast Shopify app store.