- Fujitsu Ltd.
- Cisco Systems Inc.
- IBM Corporation
- Alcatel-Lucent S.A
- AT&T Inc.
- HP Development Company L.P.
- Microsoft Corporation
- Verizon Communications Inc.
- Dell Technologies Inc.
- Nokia Solutions and Networks
- Deutsche Telekom AG
- Rackspace Inc.
- Tata Consultancy Services Limited
- Citrix Systems Inc.
- Wipro Ltd.