?- Twilio Inc.
- Vonage Holdings Corp
- MessageBird B.V.
- Plivo Inc.
- Snich AB
- Voximplant (Zingaya Inc.)
- 8x8 Inc.
- Voxvalley Technologies
- Bandwidth Inc. (Bandwidth.com)
- IntelePeer Cloud Communications
- Wazo Communication Inc.
- Avaya Inc.
- AT&T Inc.
- Mitel Networks Corporation
- Telestax
- Voxbone SA
- Iotum Inc.
- M800 Limited
- Infobip Ltd
- EnableX.io (VCLOUDX PTE. LTD)