Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
WATI - No-code chatbot builder for WhatsApp Business
Plivo - Plivo simplifies your customer engagement.
SleekFlow.io - Sell, convert & support better on chat