Definition
CPaaS (communications platform as a service) is a cloud model in which a provider offers programmable building blocks, such as phone numbers, call control, messaging, and APIs, that developers use to add voice and text to their own applications.
A CPaaS gives a development team the raw materials of telephony without running carrier infrastructure: provisioning numbers, placing and receiving calls, playing audio, collecting keypad input, and receiving call events through webhooks. Pricing is typically usage-based, and the customer's own code decides what each call does. That flexibility is the appeal, and it also means the customer owns everything built above the API.
For patient outreach, the work above the API is substantial. Getting calls answered takes number reputation management and branded caller ID; the patient has to be verified before any PHI is discussed; and consent, calling-hour, and disclosure rules have to be enforced on every call. A CPaaS supplies the connection, and the calling program supplies the rest or assembles it from other vendors.
How Consig handles it
Consig's product page compares CPaaS, voice AI, and CCaaS point solutions: CPaaS covers automated calls with deterministic flows, but not number and reputation management, patient authentication, or compliance monitoring. Consig covers the full stack through one integration; see Consig vs. CPaaS.