Mailchimp Transactional Email (formerly Mandrill) is a reliable, scalable and secure delivery API for transactional emails from websites and applications.
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.
Gurucan is a mobile-first, all-in-one platform to create online courses, memberships and live sessions while running marketing automation, webinars, and more.