A dedicated application makes sense when a company process is important, repeatable, and does not fit into an off-the-shelf tool without constant workarounds.
The quickest answer is: Custom Web Application or Off-the-Shelf System?
When to choose an off-the-shelf tool, when to choose an integration, and when to choose a dedicated web application.
An off-the-shelf system works well for a standard process
If the process is typical, it is often better to implement a CRM, booking system, helpdesk tool, or e-commerce platform and then integrate it.
A dedicated application organizes a company’s advantage
A custom system makes sense when a company has a specific way of handling orders, quotes, documents, B2B customers, or team workflows.
The best starting point is a limited MVP
The first version should include only the core process: roles, statuses, data, the most important actions, and one or two integrations.