1. 2600Hz Inc.
2. 3CX
3. 8x8 Inc.
4. ALE International
5. Avaya Inc.
6. AVOXI Inc.
7. Bandwidth Inc.
8. Bharti Airtel Limited
9. BICS by Proximus PLC
10. CM.com Netherlands B.V.
11. Commio
12. Digital Samba
SL
13. Dolby.io by Dolby Laboratories Inc.
14. iBASIS Inc.
15. iFlyChat
16. IMImobile Limited
17. Infinite Connect
18. Infobip Limited
19. Innoinstant
20. IntelePeer Cloud Communications LLC
21. Iotum Inc.
22. JivoChat
23. Kaleyra Inc.
24. Lark Technologies Pte. Ltd.
25. LiveAgent by Quality Unit
s. r. o.
26. Mavenir Systems Inc.
27. MessageBird B.V.
28. Mitel Networks Corporation
29. MOBtexting
30. MSG91
31. Nylas Inc.
32. Plivo Inc.
33. PT. Telekomunikasi Indonesia International (Telin)
34. RingCentral Inc.
35. Route Mobile Limited
36. SendBird Inc.
37. Sinch AB
38. Tanla Platforms Limited
39. Telesign Corporation
40. Telnyx LLC
41. Text Us Services Inc.
42. TextMagic Limited
43. Twilio Inc.
44. Vonage Holdings Corp. by Ericsson AB
45. Voximplant Inc.
46. Voxvalley Technologies Pvt. Ltd.
47. Wazo Communication Inc.
48. Weavy by Mindroute Incentive USA Inc.
49. Yellow.ai
50. Zadarma Corporate Group