Twilio - Brings voice and messaging to your web and mobile applications.
Sage HR - Sage HR is a one-stop shop for your HR management needs. Your HR - simplified!
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Planday - Employee scheduling, time tracking & absence management
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Staffvelox - Staffvelox is a simple employee scheduling software that helps you create work schedules, manage shifts, track time and communicate with employees.