8X8 INC.
Ale International Sas
AT&T INC.
CISCO SYSTEMS INC.
Dialpad Inc.
Fuze Inc.
Inphonex Group
Intrado Corp.
LOGMEIN INC.
MICROSOFT CORP.
Mitel Networks Corp.
Nextiva Inc.
Ooma Inc.
Phone Power Llc
Rakuten Viber (viber Media S.? R.l.)
RINGCENTRAL INC.
T-MOBILE U.S. INC.
VERIZON COMMUNICATIONS INC.
Vonage Holdings Corp.
Zoom Video Communications Inc.