SendGrid - Learn why more developers choose SendGrid for their email deliverability service to send transactional emails triggered by web apps. Get started for free
Kite.ly - KITE is the most advanced software platform for powering a global print-on-demand internet business. We handle custom merchandise and photo print solutions for forward-thinking businesses around the world.
Postmark - Postmark is the easiest and most reliable way to be sure your important transactional emails get to the inbox. Simply & reliably parse recieved email to JSON for your webapp.
Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
JangoSMTP - JangoSMTP is a transactional email delivery service that adds tracking and authentication to email.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.