What is CPaaS?

CPaaS (Communications Platform as a Service) is a cloud platform that delivers voice, messaging, and video capabilities as programmable APIs and SDKs. It lets developers embed real-time communications (making and receiving calls, sending SMS, running phone menus) directly into their own applications, without owning or operating the underlying telecom infrastructure.

How it works

A CPaaS provider runs the carrier connectivity, media servers, phone-number inventory, and signaling on the customer’s behalf and exposes them through web APIs. A developer makes an HTTPS request or webhook callback to place a call, play audio, gather keypad input, or route to a destination. The platform handles call setup, media, and connectivity to the public telephone network (PSTN) behind the scenes, billing on usage.

Why it matters

CPaaS lowers the barrier to adding communications to software. Instead of negotiating carrier contracts and building telephony stacks, teams ship features like appointment reminders, two-factor voice codes, click-to-call, or fully custom call flows in days. It underpins use cases from notifications to AI voice agents.

FAQ

What is CPaaS? CPaaS (Communications Platform as a Service) is a cloud platform that delivers voice, SMS, and video as APIs, letting developers embed real-time communications into their own applications without building or operating telecom infrastructure.

How is CPaaS different from CCaaS? CPaaS provides programmable building blocks that developers assemble into custom features. CCaaS is a packaged, ready-to-use cloud contact center for agents and supervisors. CPaaS is for builders; CCaaS is for operations.