Topicbox - Put team emails into one centralized, searchable place
Aritic Mail - Ariticmail is a transactional email delivery API for applications and enterprises.
Nova Inbox - Personalize emails in seconds, right from your inbox
SendWithUs - Take control of your transactional email. sendwithus is the missing tool for marketers to manage and optimize transactional emails.
InboxSDK - First usable API to write Gmail Apps for 1B active users
Amazon SES - Scale your business email & marketing messages with Amazon Simple Email Service (SES), a cost-effective and reliable cloud email service. Sign up today.