There are many companies in the world that provide pent-testing services. If you're developing software that thousands, if not millions, of people should be using? Then you should be aware of the dangers your application may face, including malware, bugs, viruses, hacks, cyberattacks, etc. In the suggested article an excellent selection of the best pentest companies so that you know how to choose the right testing partner if you have to deal with pentesting companies.
https://pentestapp.io/