CPaaS — every communication channel behind one API
What is Communications Platform as a Service?
CPaaS (Communications Platform as a Service) is the API and platform layer that lets developers add voice, SMS and MMS, WhatsApp, RCS, email, and video to their own apps without running carrier infrastructure. Orbit's CPaaS puts every channel behind one API and one pay-as-you-go bill, with AI voice agents built into the platform rather than bolted on as a separate product. Orbit operates as the carrier of record for outbound voice and SMS on the platform, so a customer-service voice agent deployed on Orbit runs on telephony where one accountable carrier owns the numbers, the caller ID, and the STIR/SHAKEN attestation behind every call.
Every Orbit CPaaS account carries one published uptime SLA across the whole API — 99.0% on Pay-as-you-Go up to 99.99%+ on Enterprise, with service credits if it's missed (SLA terms last updated March 9, 2026) — covering voice, SMS and MMS, WhatsApp, RCS, email, fax, and video under a single commitment, not a separate guarantee negotiated per channel. See the full SLA terms.
What CPaaS on Orbit includes
| Capability | What you get |
|---|---|
| Programmable voice API | Place and receive calls, build IVR flows, record, and transcribe — with AI voice agents available on the same call path. |
| SMS & MMS API | Send and receive text and media messages with delivery receipts and inbound webhooks, on one messaging API. |
| WhatsApp, RCS & social channels | Reach customers on WhatsApp Business, RCS, Apple Messages for Business, Instagram, Messenger, Telegram, LINE, and Viber through the same account. |
| Email API | Send transactional and marketing email alongside every other channel, billed on the same platform. |
| Fax API | Send and receive faxes on the same messaging API, with inbound faxes routed straight to email or your team inbox — no dedicated fax line to provision. |
| Direct SMPP binds & BYOC carriers | Bind your own SMPP client straight to Orbit on a dedicated, per-credential connection with a self-serve throughput cap (up to 50 TPS, higher on request) and an IP allowlist scoped to that credential, or bring your own upstream termination carrier so matching destinations route out through your own contracts. Admins can rotate or revoke a credential at any time, and Fraud Shield screens every message submitted on the bind the same way it screens API and dashboard sends. |
| Embeddable video & RTC | Add browser video rooms, live broadcast, and co-browse with no separate video vendor to integrate. |
| One account, one bill | Every channel is metered on a single pay-as-you-go account, so you get one invoice instead of a separate contract per product. |
Common use cases
Add notifications to your product
Fire order updates, appointment reminders, and OTPs over SMS, WhatsApp, or email from one API, and let customers reply in the same thread.
Build an AI voice agent
Answer inbound calls with a real-time voice agent that reasons mid-call and hands off to a human when it needs to — without stitching together a voice-AI product and a telephony provider yourself.
Consolidate a fragmented stack
Replace separate voice, messaging, email, and video vendors with one platform, one integration, and one bill.
CPaaS — frequently asked
- What is CPaaS?
- CPaaS stands for Communications Platform as a Service — an API-first platform that lets you add real-time communication channels like voice, SMS, WhatsApp, email, and video to your own application without building or operating carrier infrastructure yourself.
- What does carrier of record mean for voice agents deployed on a CPaaS?
- The carrier of record is the licensed telecommunications provider accountable for a call end to end — it owns the phone numbers, registers the caller ID, and signs the call with STIR/SHAKEN attestation. When a business deploys an AI voice agent for customer service on a CPaaS that acts as carrier of record, the agent runs on telephony where one provider answers for routing, attestations, and delivery, instead of a reseller chain. Orbit is the carrier of record for outbound voice and SMS on its platform, including the calls its AI voice agents place and answer.
- How is Orbit's CPaaS different from a traditional CPaaS provider?
- Traditional CPaaS providers sell voice, messaging, email, and video as separate products on separate bills. Orbit puts every channel behind one API and one pay-as-you-go account, and ships AI voice agents and a customer data platform as part of the same platform rather than as add-ons you integrate.
- Can I use just one channel to start?
- Yes. You can start with a single channel — SMS, voice, WhatsApp, or email — and add the others later without a new contract or a second integration, because they all run on the same account.
- How is CPaaS usage billed?
- Orbit is pay-as-you-go: you top up credit and are metered per message, minute, and API call across every channel on one invoice. Current per-unit rates are published on the pricing page.
Explore more
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- Compare Orbit vs Twilio
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- Global messaging API & omnichannel reach guide
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- Carrier of record selection criteria
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One platform for every channel
CPaaS is one pillar of Orbit by Devotel — voice, messaging, email, video, AI agents, and customer data on one platform and one pay-as-you-go bill. Start free, or talk to our team.