Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
SageMailer - The best tool for getting organic Amazon reviews and seller feedback. 100% Amazon compliant. Monitor reviews & get notifications for unlimited ASINs. Multilingual templates for all Amazon marketplaces.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
EasyChannel - Simplify your multichannel eCommerce with EasyChannel.
Plivo - Plivo simplifies your customer engagement.
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