Gmail is a free, advertising-supported email service offered as part of Google's G Suite, with 15GB of storage, color-coded inbox filters and unsend button.
Google Cloud DNS is a high-performance, resilient, global DNS service that provides a cost-effective way to make applications and services available to users.
Hypertext Markup Language (HTML) is the standard markup language for documents designed to be displayed in a web browser. It can be assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript.
Mailchimp Transactional Email (formerly Mandrill) is a reliable, scalable and secure delivery API for transactional emails from websites and applications.
Segment collects, centralizes, organizes and analyzes all their customer data coming from multiple sources such as apps, websites, and various devices.