Twilio

Market leader in CPaaS (Communications Platform as a Service) with a growing presence in customer data and engagement through Twilio Segment

Twilio is a cloud communications platform-as-a-service (CPaaS) company headquartered in San Francisco, California. Founded in 2008, Twilio pioneered the developer-first approach to communications by offering programmable APIs that allow businesses to embed messaging, voice, video, email, and other communication channels directly into their applications. Its platform abstracts the complexity of global telecom infrastructure, enabling companies of all sizes to build scalable, customizable customer engagement experiences without managing carrier relationships or hardware. Twilio's product portfolio has expanded significantly beyond its original SMS and voice APIs. Through organic development and strategic acquisitions — most notably SendGrid (email) and Segment (customer data platform) — Twilio has positioned itself as a comprehensive customer engagement platform. Twilio Segment, in particular, gives the company a strong foothold in the customer data and identity resolution space, making it relevant not just to developers but to marketing and data teams seeking unified customer profiles across touchpoints. In the AdTech and MarTech ecosystem, Twilio sits at the intersection of communications infrastructure and customer data. Its APIs are used by thousands of companies to power two-factor authentication, marketing campaigns, customer support workflows, and personalized outreach at scale. Twilio competes with players like Vonage (Ericsson), MessageBird, and Bandwidth on the CPaaS side, while Segment competes with mParticle and Tealium in the CDP space. Twilio is publicly traded on the NYSE under the ticker TWLO.