Melrose Labs SMSC Simulator - SMPP SMSC simulator to test SMS messaging applications.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
Twilio - Brings voice and messaging to your web and mobile applications.
Nextiva - Business VoIP, cloud phone systems trusted by more than 150,000 companies. Powered by the leading cloud PBX VoIP platform, Nextiva is rated the best business VoIP service provider.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Genesys Cloud - As the foundation of great customer experience, the Genesys PureCloud contact center platform empowers your business to provide excellent service across the entire customer journey.