To be honest, each method is good in its own way, and it's hard to choose one option over the other. I would say that everything is situational. You can read about this on the Develux blog here https://develux.com/blog/outsourcing-vs-insourcing-the-great-dilemma They have described it in detail and explained which option is better. In my case, outsourcing turned out to be more promising.