The Pay-per-bug is ideal for companies that need to perform web and mobile applications tests, but they have limited time and budget. This model works as a beta test, where real users use the developed systems to find bugs. The client only pays for bugs founded and approved. Who defines the term of execution and the amount limit to spend is the customer, this model ends up being adaptable to any reality. Another important point is with regard to the results delivered: besides having real-time access to all the bugs registered during the tests, the whole result is exported at the end of the process. And there is more: the client is the one who defines what types of bugs should be registered. For example, if the profile of your application does not require an interface analysis, just remove the type of interface bug and none of that type will be registered.