Mixpanel

Intercom is a Conversational Relationship Platform. It shows you who is using your product or website and makes it easy to personally communicate with them with targeted content, behavior-driven messages, and conversational support.

Optimizely offers powerful, easy to use solutions, to test what messages, imagery, and offers help increase conversion, retention, and lifetime value.

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. Its ease of use and setup is what's most attractive to merchants, but also the incredibly vast Shopify app store.

Klaviyo

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.

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.