Off-the-shelf solutions (SaaS, ERP, CRM) are a great choice for standard needs: payroll, basic CRM, email. When your processes are unique or when a package doesn't adapt enough, custom software becomes meaningful.
When to go custom. When you have specific workflows that no package covers well; when you need tight integration with multiple systems; when data and security are critical and you want control over the architecture.
When to use a package. When needs are met by mature products (e.g. Microsoft 365, Salesforce) and customization isn't excessive. Often the optimum is a mix: a package for "back office" and a custom app for core processes.
At RSLabs we help you decide: based on your goals, budget, and timeline we recommend either a custom solution, package integration, or a hybrid.