Server architecture is categorized into on-premises, cloud, and serverless, each with distinct characteristics affecting security responsibilities. On-premises involves physical servers owned by a company, granting full control but requiring comprehensive security management, including updates and hardware maintenance. Cloud computing offers virtual servers hosted by providers like Amazon or Google, relieving users of hardware upkeep but still necessitating software updates and security measures. Serverless, a subset of cloud solutions, operates on a Function as a Service (FaaS) model, where code is triggered by events without the need for dedicated server management. Despite these differences, users remain responsible for the security of their applications across all architectures. Detectify aids in securing web applications by regularly updating its vulnerability tests and adapting to different hosting environments, though it operates from its own infrastructure rather than offering an on-premises solution.