Video SDK from Zoom - Build fully customizable video-based apps
Whappext - Whappext is an online marketing platform that helps users to send bulk messages to millions of users for the marketing of their brands.
Amazon Chime - Online meetings and video conferencing
Viking Whatsapp Tools - Viking Whatsapp Tools is a platform that helps businesses to sell on WhatsApp and build an effective sales strategy.
AuthKey.io - SMS API and WhatsApp Business API
Kaleyra - Kaleyra is a platform that helps developers to build SMS and voice messaging applications for a global scale.