Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Whapi.Cloud - Integrate WhatsApp without limits to your own services or apps! Groups & Buttons, Technical support & Guides. API works stably and does not crash during updates. Whapi.Cloud is Developer-friendly REST API for WhatsApp integration
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
360dialog - 360dialog is a mobile app marketing automation platform that allows app publishers to engage and convert users.
Plivo - Plivo simplifies your customer engagement.
Maytapi - Serverless Whatsapp Api with Chat and Agent support.