1. Accenture PLC
2. Amdocs Group
3. Cisco Systems Inc.
4. Comarch SA
5. Comviva Technologies Limited
6. Hewlett Packard Enterprise Development LP
7. Huawei Technologies Co. Ltd
8. Infosys Limited
9. International Business Machines Corporation
10. MYCOM OSI
11. Netcracker Technology Corp.
12. Nokia Corporation
13. Openet Telecom Ltd
14. Optiva
Inc
15. Oracle Corporation
16. Sigma Systems Canada LP
17. Subex Limited
18. Tata Consultancy Services Limited
19. Telefonaktiebolaget LM Ericsson
20. Wipro Limited