1. 8x8 Inc.
2. Amazon Web Services Inc.
3. Atos SE
4. Avaya LLC
5. BICS
6. CallFire Inc.
7. Cisco Systems Inc.
8. Comcast Cable Communications Management
LL
9. DXC Technology Company
10. Fujitsu Limited
11. Google LLC By Alphabet Inc.
12. IntelePeer Cloud Communications LLC
13. International Business Machines Corporation
14. Kandy Communications
15. Mavenir Systems Inc.
16. Microsoft Corporation
17. NTT Communications Corporation
18. Plivo Inc.
19. Robert Bosch GmbH
20. Sangoma Corporation
21. SAP SE
22. Siemens AG
23. Twilio Inc.
24. Vonage America
LLC
25. West Technology Group
LLC