CPaaS
Programmable communications delivered through REST APIs and webhooks — embed voice calling, SMS, WhatsApp messaging and WebRTC video into any application without your developers learning telecom protocols. Built for click-to-call, OTP delivery, two-factor authentication and in-app video. The telco-grade building blocks, none of the telco complexity.
Overview
Sometimes you do not want a communications application — you want communications embedded inside your own application, exactly where your users already are. Communications Platform as a Service (CPaaS) delivers programmable voice, messaging and video as REST APIs and WebSocket streams that your developers integrate directly into your product. A ride alert arrives in-app, a one-time code lands over SMS, a video consult opens in the browser — all without your team learning SS7, maintaining a SIP stack or negotiating carrier contracts. We give you telco-grade communication building blocks without the telco complexity: just an API key and a callback URL.
Clevertek scopes every engagement to your environment — capacity, sites, compliance and support model — so you get a tailored plan rather than a fixed SKU. Pricing is quote-only, and our solutions architects will work through your requirements before any proposal.
Our approach
We provide the CPaaS platform, carrier interconnects, API documentation and integration support that lets your developers embed voice, SMS, WhatsApp, RCS and WebRTC video into any application. Our platform handles signalling, media processing, carrier routing and regulatory compliance behind the API so your team builds features, not telecom infrastructure.
Why work with us
Carrier-owned infrastructure
Unlike aggregators, we own the voice and messaging network our CPaaS runs on. That means predictable pricing, direct carrier routing and no third-party markup on every API call.
India regulatory ready
TRAI compliance, DLT registration for SMS, consent management and data localisation are built into the platform. Your developers do not need to become telecom compliance experts.
Full channel depth
Voice, SMS (through SMPP and HTTP), WhatsApp Business API, RCS and WebRTC video — all from one API surface. Choose the channels your users actually use.
Key benefits
What this solution delivers for your business.
Faster feature delivery
Your team builds with REST APIs and webhooks instead of learning SS7, SIP or carrier negotiation. A programmable voice feature ships in days, not quarters.
Pay-per-use economics
No minimum commitment, no fixed capacity tiers. You pay for the messages you send and the call minutes you use. Scale from pilot to millions of interactions on the same API key.
Carrier-grade at API simplicity
The underlying infrastructure handles five-nines availability, regulatory routing and media transcoding. Your application calls a REST endpoint and gets carrier-grade communications.
What's included
Part of this managed service.
Programmable voice
Originate, terminate and route PSTN and VoIP calls from your application via REST APIs or SIP trunking. DTMF capture, call recording, IVR menu injection and real-time call control — all from your code.
- REST and SIP APIs for call control
- Click-to-call and in-app voice dialling
- Call recording and DTMF capture
- IVR injection and menu navigation
Messaging across every channel
A2P SMS via SMPP and HTTP for bulk and transactional, WhatsApp Business API with template approval and two-way session management, and RCS Business Messaging for rich branded conversations.
- A2P SMS with SMPP and HTTP APIs
- WhatsApp Business API with templates
- RCS Business Messaging for rich media
- Two-way session management across channels
Embeddable WebRTC video
Video sessions with SFU or MCU topology, simulcast, screen sharing and cloud recording — fully branded inside your application. No separate meeting tool for the user to install or visit.
- WebRTC video with SFU or MCU
- Simulcast and screen sharing
- Cloud recording and playback
- Fully branded in-app experience
API-first everything
Every capability exposed through REST endpoints and WebSocket streams. Webhooks deliver inbound events in real time. A dashboard shows usage, provisioning and billing per API key.
- REST APIs and WebSocket streams
- Webhook event delivery for inbound events
- Usage dashboard with per-key metrics
- No console-only features hidden behind UI
Where it helps
Real-world scenarios where this solution delivers measurable outcomes.
A product that needs to talk to its users directly
Embed programmable voice, SMS or video so the interaction lives inside your application. A one-time code, a ride alert or a video consult — all without redirecting to a separate tool.
Authentication that needs a trusted channel
Send OTPs and verify phone numbers over programmable channels you control end to end, without routing through a third-party gateway that introduces latency and cost.
Questions buyers actually ask
Is CPaaS the same as UCaaS or CCaaS?
No. UCaaS and CCaaS are finished applications. CPaaS is the raw building block you build with. Choose CPaaS when communications must live inside your own product rather than sending users to a separate tool.
Do we need developers on our team to use CPaaS?
Yes — that is the point. CPaaS is for teams that want communications as a programmable feature of their software. The API does the heavy lifting, but someone needs to call it.
Which channels are available through CPaaS?
Voice, SMS, WhatsApp, RCS and WebRTC video — all through one API surface. We help you pick the channels your users actually use rather than enabling everything and hoping for adoption.
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Ready to scope a solution?
Talk to a Clevertek solutions architect about your requirements — no obligation.