Definition
CPaaS (Communications Platform as a Service) is a cloud platform that lets businesses add messaging, voice and verification to their own apps through APIs, instead of building telecom infrastructure.
A CPaaS provider runs the connections to operators and messaging platforms and exposes them through APIs and SDKs: SMS, WhatsApp, RCS, voice calls, OTP and more, with webhooks for events.
Businesses use CPaaS to build OTP verification, notifications, contact-centre integrations and chat automation inside their own systems, paying per message or minute.
How CPaaS compares: UCaaS (unified communications as a service) is ready-made calling, meetings and chat for a company’s own staff; CCaaS (contact centre as a service) is a hosted agent desktop for customer service; an SMS aggregator sells routes for a single channel. CPaaS sits underneath them as programmable building blocks that developers assemble into their own products.
Pricing is usually usage-based: a rate per SMS segment by destination, a per-message fee for WhatsApp that Meta sets per market and category, per-minute rates for voice, and sometimes monthly fees for numbers or sender IDs. Ask whether channel fees are passed through at cost or marked up, because that difference grows with volume.
When comparing platforms, look at route quality and coverage, channel breadth, API documentation, compliance support in your markets and how delivery data is reported.
For the GCC and MENA, check Arabic support end to end (UCS-2 SMS, right-to-left templates, Arabic text-to-speech), help with sender ID registration with regulators such as the TDRA in the UAE and the CST in Saudi Arabia, and where message logs are stored.
OmniChannels.ai is BroadNet’s CPaaS and omnichannel platform, with a REST API, SDK, webhooks and SMPP.
Example
Sign-up OTP built on a CPaaS:
1. The app calls the verification API with the user’s number.
2. The platform sends a WhatsApp authentication template.
3. No delivery receipt within 30 seconds → the same code goes by SMS.
4. A webhook reports “delivered”; the user enters the code and the app checks it.