According to Transparency Market Research, the global OSS/BSS market is dominated by Ericsson, Accenture, and Amdocs, who collectively accounted for 27.9% of the market in 2012. Beyond these three, however, the next seven companies collectively accounted for around 22% of the market, and the degree of fragmentation is even higher beyond the top ten key players. Overall, the global OSS/BSS market is moderately fragmented and includes several small-scale producers. 

Some of the other leading companies in the OSS/BSS market are IBM Corporation, Oracle Corporation, Infosys Ltd., CSG International, Tata Consultancy Services, Redknee Solutions Inc., HP, Nokia Siemens Networks, Alcatel-Lucent, Huawei Technologies, and Capgemini S.A.

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