There are cases when building custom crm software is a good idea.
Some features you need are available, but the others might be absent.
Of course, you may search for the solution tailored to your niche, but still, they are created without thinking about your unique business needs.
So, if you have one, it's worth investing in CRM development.
Today, we use a lot of products aimed to make our business efficient.
Most CRM software provides flexibility in terms of integrations, but usually, they can be tied only with popular products.