BaaS and SaaS sit at opposite ends of the cloud service spectrum. Backend as a Service (BaaS) gives developers a ready-made backend — database, authentication, APIs, and hosting — to build their own applications on. Software as a Service (SaaS) gives end users a finished application they simply log in to and use. One is a building block; the other is the completed building.
The confusion is understandable: both are cloud subscription services, and both remove infrastructure work. But they serve entirely different audiences and solve different problems. This guide breaks down how each model works, where they differ, and how to decide which one your project actually needs.
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