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How Modern Application Delivery Models Are Evolving: Local Apps, VDI, SaaS, and DaaS Explained

 

Since the early 1990s, the methods used to deliver applications and data have been in constant transition. Today, IT teams must navigate a wider range of options—and a greater level of complexity—than ever before. Because applications are deployed in different ways for different needs, most organizations now rely on more than one model at a time. To plan future investments effectively, it’s important to understand how local applications, Virtual Desktop Infrastructure (VDI), Software-as-a-Service (SaaS), and Desktop-as-a-Service (DaaS) complement each other.

Local Applications

Local applications are installed directly on a user’s device, a model that dominated the 1990s and remains widely used. Their biggest advantage is reliability: apps are always accessible, customizable, and available wherever the device goes.

However, maintaining these distributed installations can be challenging. Updates must be rolled out across multiple endpoints, often leading to inconsistency. Performance may also fluctuate if these apps depend on remote databases or storage resources. Security adds another layer of complexity, as corporate data must move to the device, increasing the risk of exposure and demanding strong endpoint protection.

Virtual Desktop Infrastructure (VDI)

VDI centralizes desktops and applications in a controlled environment—whether hosted on-premises or in pri

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