What are open source based software?

Q. What are open source based software?

Answer =

Open Source Software, which refers to software whose source code is available to customers and it can be modified and redistributed without any limitation. An OSS may come free of cost or with a payment of nominal charges that its developers may charge in the name of development, support of software.

In other words:-

Open Source Software, on the other hand, can be freely used (in terms of making modifications, constructing business models around the software and so on) but it does not have to be free of charge. Here the company constructing the business models around open source software may receive payments concerning support, further development. What is important to know here is that in open source software, the source code is freely available to the customer.