Wavecell - Wavecell simplifies real-time cloud communications using SMS, Chat Apps, Video Interaction and Voice solutions.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Twilio - Brings voice and messaging to your web and mobile applications.
Twilio Flex - The programmable contact center platform 📱
Drift - A messaging app that helps you grow your business.
MessageBird Voice API - Add programmatic call capabilities to your app or service