| Name |
|---|
| Trillian |
| Troop Messenger |
| Trumpia |
| Twine |
| Viber Media S.à r.l. |
| Vidyo, Inc. |
| VirnetX Holding Corporation |
| Webtext, LLC |
| WeeChat |
| WeVideo, Inc. |
| WhatsApp, Inc. |
| WhosOn |
| Wrinkl, Inc. |
| Yalochat, Inc. |
| Yellow Messenger |
| YouMe |
| Zelas Co., Ltd |
| Zoom Video Communications, Inc. |
| Zulip |