| 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 |
| N/A | Vonage APIs (formerly Nexmo and TokBox) help growing startups and agile enterprises enhance customer experience and realize new business outcomes at scale. With a comprehensive suite of communication channels, a global platform, and expert support, users can abstract the complexity of communications and innovate faster. | N/A |