Vero - Email platform for product, marketing and engineering teams
RealTime Email - RealTime Email provides email relevance by enabling marketers to respond to each recipient’s personal context.
Mailgun - A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.
Vena - Vena is the corporate performance management software combines native Microsoft Excel with the sophisticated workflow, audit capabilities, business rules and central database of an enterprise-class solution.
Aritic Mail - Ariticmail is a transactional email delivery API for applications and enterprises.
Doppler Relay - Doppler Relay guarantees the arrival of the Emails and allows to access detailed analytics in real time.