| N/A | Bandwidth, headquartered in Raleigh, provides business class communications platform as a service (CPaaS), supporting many use cases such as lead alerts for sales, automated customer surveys, conference calls and messaging, and virtual call center, among other cases. | $0.01 per message |
| N/A | Twilio offers a CPaaS and CCaaS solution, with the combination of its programmable Voice, Video, and Messaging APIs, as well as the Twilio Flex cloud contact center. Additional capabilities include Twilio's Elastic SIP Trunking, as well as API for WhatsApp. | $0 per min per participant |