Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Twilio Studio - Accelerate your customer engagement roadmap
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Incoming Feedback by Hotjar - Instant visual feedback for your website or app!
Plivo - Plivo simplifies your customer engagement.
Froged - One click solution providing easy-to-use marketing, sales and support services to turn website visitors into happy customers.