Twilio.org Competitors

RingCentral, Inc. (NYSE: RNG) is a global leader in AI–powered customer engagement, delivering an integrated platform for business phone, SMS, contact center, workforce engagement management, video collaboration, and messaging. Powered by advanced AI capabilities, RingCentral delivers intelligence at every phase of the conversation journey — before, during, and after each human interaction. With RingCentral, businesses can work smarter, respond faster, and connect more meaningfully with their customers. Visit ringcentral.com to learn more. Our decades-long leadership in reliable and secure cloud communications has earned us the trust of nearly 600,000 customers and millions of users worldwide. RingCentral is headquartered in Belmont, California, and has offices around the world.

We’re making communications more flexible, intelligent, and personal, to help enterprises the world over stay ahead. We provide unified communications, contact centers and programmable communications APIs, built on the world's most flexible cloud communications platform. Vonage was founded in 2001 and became a wholly-owned subsidiary of Ericsson in 2022. Vonage is headquartered in Holmdel, New Jersey. We hope you'll join the conversation with us and welcome your feedback. However, we reserve the right to remove comments that are offensive, abusive, spam, or third-party advertisements.

Sinch is the enterprise communications infrastructure the AI era runs on. Our vision is to connect every business with every customer, everywhere in the world. Trusted by more than 200,000 customers across the globe, we power over one trillion customer interactions annually across messaging, email, and voice. Leading global companies, including AI innovators, rely on our powerful APIs and intuitive applications to strengthen customer relationships and deliver seamless experiences at scale. Profitable since our founding in 2008, Sinch generated net sales of USD 3 billion (SEK 27 billion) in 2025 and has over 4,000 Sinchers in 60 countries, with headquarters in Stockholm. Driven by bold ambitions and simplicity, we dream big and make great things happen – for our teams, our customers, and their customers. Together, we’re pioneering the way the world communicates. Sinch is listed on Nasdaq Stockholm (XSTO: SINCH). Learn more at sinch.com.