# Cloud Service Provider (CSP)

A Cloud Service Provider (CSP) is an organization that offers cloud-based infrastructure, platforms, or software services to customers over the internet. The three primary service models are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).

CSPs abstract away the complexity of managing physical hardware, networking, and data center operations. Customers can provision and scale resources on demand, paying based on actual usage rather than upfront capital expenditure. This model enables rapid deployment and experimentation with lower financial risk.

In the context of API management and serverless architectures, CSPs provide the compute, storage, and networking primitives upon which serverless functions and API gateways run. Choosing a CSP affects latency, compliance, pricing, and the available ecosystem of managed services. Multi-cloud strategies, which use multiple CSPs, can reduce vendor lock-in but add operational complexity.


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