1. Avaya Inc
2. Bravenet Web Services Inc.
3. CafeX Communications Inc
4. Capgemini SE
5. Cisco Systems Inc.
6. Dell EMC Corporation
7. Dialogic Group Inc.
8. Enghouse Systems Ltd.
9. Fujitsu Limited
10. Google LLC
11. International Business Machines Corporation
12. Microsoft Corporation
13. NEC Corporation
14. Open Text Corporation
15. Oracle Corporation
16. Salesforce Inc.
17. SAP SE
18. Thomson Reuters Corporation
19. Tumblr by Automattic
20. VMware Inc.
21. Vonage Holdings Corp.
22. Weebly by Square
Inc
23. Wix.com
Inc
24. WordPress
25. Zoho Corporation