PaaS — Platform as a Service
What is PaaS?
PaaS (Platform as a Service) is the cloud model where a provider runs the underlying infrastructure — servers, network, and a managed runtime — so a team can build and run applications on top of it instead of operating that infrastructure itself. In communications, the common PaaS variants specialize by domain: CPaaS (Communications Platform as a Service) exposes voice, messaging, and video as APIs; CCaaS covers contact centers as a finished agent-facing application; and UCaaS covers a company's internal phone system.
More detail
“X as a Service” labels share the same underlying model — the provider runs the infrastructure, the customer runs the application — and differ only in what the platform delivers. Cloud-computing categories like IaaS (infrastructure) and SaaS (finished applications) sit underneath and above a platform layer; in communications the suffix letters name the domain instead: CPaaS for programmable APIs, CCaaS for contact centers, UCaaS for internal communications, and specialist variants like AIaaS (AI agents) or NaaS (network APIs) are the same platform-as-a-service model applied to a specific domain.
CPaaS is the most example-rich PaaS variant in communications because decision teams can see the boundary directly: the provider owns carrier interconnects, routing, and compliance tooling while the customer's developers compose voice calls, SMS, WhatsApp, RCS, email, and video into their own product through one API. That boundary — provider runs the platform, customer runs the application — is exactly what “platform as a service” means, which is why CPaaS reads as the clearest instance of the general PaaS definition in this industry.
Orbit is one PaaS example of this model in the communications domain: a single account exposes the CPaaS, CCaaS, and UCaaS pillars (plus AIaaS, NaaS, and the others) behind one API and one pay-as-you-go bill, rather than a general-purpose compute PaaS.
Frequently asked
- What does PaaS mean in a CPaaS context?
- It means the same provider-runs-the-platform model specialized for communications: a Communications Platform as a Service (CPaaS) lets a developer build on managed voice, messaging, and video APIs rather than operating carrier infrastructure. The “Platform as a Service” half of the acronym describes the delivery model, and “Communications” names the domain.
- How is PaaS different from IaaS and SaaS?
- IaaS is raw compute resources, SaaS is a finished application to configure and use, and PaaS sits between them — a managed platform a team builds applications on. Communications follows the same pattern, where CPaaS (programmable APIs) is the build-on layer and CCaaS/UCaaS are finished applications delivered on top of the same platform model.
- Is Orbit a PaaS?
- Yes, in the communications sense — Orbit is a CPaaS that also ships CCaaS and UCaaS pillars on the same account, so it is a platform-as-a-service applied to communications rather than a general-purpose compute PaaS.
See also
Build it on Orbit
Voice, messaging, email, video, and AI agents on one platform and one pay-as-you-go bill. Start free — no credit card required.