Aritic Mail - Ariticmail is a transactional email delivery API for applications and enterprises.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

Smartech - Smartech is a AI-powered Cross-channel Marketing Automation & Analytics Suite. It helps marketers and product managers LISTEN to and ANALYSE consumer behavior, and execute hyper-personalised campaigns to retain and engage users (CONVERSE).

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

Doppler Relay - Doppler Relay guarantees the arrival of the Emails and allows to access detailed analytics in real time.

HelpScout - Help Scout is a simple, straightforward way to provide excellent support