Platform as a Service (PaaS)
PaaS offers a managed application platform that handles servers, runtimes, and scaling, letting developers focus on code at the cost of some control.
Platform as a service (PaaS) is a cloud model that provides a ready-to-use application platform. The provider manages the underlying servers, operating systems, runtimes, and scaling, and the customer supplies application code and configuration. PaaS sits between infrastructure as a service, where customers manage the operating system, and serverless, where even the runtime is abstracted away.
How It Works
Developers push code to the platform, which builds, deploys, and runs it on managed infrastructure. The platform handles provisioning, load balancing, health checks, and often autoscaling and rolling deployments. Many PaaS offerings include managed databases, caches, messaging, and build pipelines as add-ons. Examples include Heroku, Google App Engine, Azure App Service, and modern internal developer platforms built on Kubernetes. Customers trade some control over the environment for a faster, simpler path from code to production.
Why It Matters
PaaS accelerates development by removing most infrastructure work. Teams deploy frequently without managing servers, patching operating systems, or wiring up scaling. This suits standard web and API workloads and small teams that want to move fast. The trade-offs are reduced control over the runtime, possible constraints on supported languages or versions, and the risk of lock-in to a specific platform. Workloads needing custom kernels, specialized hardware, or unusual networking may be better served by infrastructure as a service.
Related Terms
PaaS abstracts above infrastructure-as-a-service, overlaps with serverless and managed services, and commonly relies on multi-tenancy.