It is one of the most popular open source FreeSWITCH solutions. It is a multi tenant IP PBX software developed on FreeSWITCH, which is one of the most scalable and robust VoIP development technologies. It can be used as a domain based or single IP PBX system with multi tenancy support. 

Yes, you can. FusionPBX is an entirely free solution and it provides an array of features of a business phone system aka PBX solution to its customers. Along with that, it also provides a multi tenant platform to providers that want to run their business by catering to local or global businesses with VoIP based phone systems. However, one can also use a single tenant version of this solution to use a FreeSWITCH based IP PBX system that has amazing features and the robust nature of FreeSWITCH. 

In simple words, it can help you increase returns over investment and the value of the platform. We have years of experience in major open source platforms, including FusionPBX. Thus, we understand this platform at its best and we can provide services that can best fit your business and its objectives. Even if you have technical expertise, using our services can ensure that you enjoy expert assistance without leaving your focus from your business. 

FusionPBX is an open source PBX platform. Thus, you receive the code of the software. When we develop an added feature with our custom services, we provide a complete feature integrated into your FusionPBX system with your branding. We also hand over the code of that feature to let you enjoy vendor independence. User guide documentation and training to use that feature are also offered to our clients depending on the engagement model.