Plivo is a Cloud API Platform and a Global Carrier Services Provider for Voice Calls and SMS. We offer HTTP APIs that let you add Voice and SMS capabilities to any web or mobile using any web standard language. We simplify the notorious complexity of the telephony business into a simple infrastructure service: we take care of everything from carrier management to call quality and messaging deliverability to 24/7 technical support. For this use case, Plivo's Voice API and Browser SDK were used to create a web-based call center without an investment in expensive hardware and ongoing hardware maintenance. Sign up for a free account today.