Segment is a Customer Data Platform (CDP). They provide a service that simplifies collecting and using data from the users of your digital properties (websites, apps, etc). With Segment, you can collect, transform, send, and archive your first-party customer data.
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.
Chatra is a live chat messenger app for your website. It is made to increase online sales but in a friendly, helpful way. Manage messages from one multichannel dashboard. Connect your inbox and Facebook Business Page and forget about switching between different browser tabs.
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.