Both strategies have their pros and cons, it really depends on a certain type of company you have and goals which you want to achieve with its help
Building your own CRM system can be necessary if:
- avaliable software types can't combine effectively with your other programs
- you know that you'll need to upgrade your system in future and not for once, it's usually not possible for the ready systems
- you have really special needs for your company in case of which ready systems aren't enough effective (it also depends on your sphere, for example they're often used in IT and software development companies)
On the other hand, buying a ready system is a better choice if:
- you need just standard functions for your firm which are avaliable in all ready systems
idapgroup.com/blog/crm-systems-buy-vs-build/
- don't have a special and skilled software team for creating your own
- technology isn't a competitive advantage for your company
- you have a limited budget and time