AT&T is a provider of telecommunications and digital entertainment services for consumers and businesses.
Twilio is a cloud communication company that enables users to use standard web languages to build voice, VoIP and SMS apps via a web API.
Twitter is a social networking platform.
SendGrid is a cloud-based customer communication platform that drives engagement and business growth.
Verizon Communications is a broadband and telecommunications company operating 4G LTE network, 3G network, and information services.
T-Mobile is a global mobile telephone operator.
Spectrum Enterprise provides cable services to residential and commercial customers in the United States.
Rogers is a diversified Canadian communications and media company engaged in wireless voice and data communications services.
Juniper Networks designs, develops and sells networking products and services.
Windstream Communications provides voice and data network communications, and managed services to businesses in the United States.
Motorola Solutions is a data communications and telecommunications equipment provider.
Polycom is a multinational corporation that develops video, voice and content collaboration and communication technology.