| Company Name | Software Titles |
|---|---|
| Zero-Knowledge Systems | 1 |
| Zabaware | 1 |
| ZJMedia | 1 |
| ZScrapbook | 1 |
| ZeroSPAM | 1 |
| ZyXEL Communications | 1 |
| zapappindia | 2 |
| Zattoo | 2 |
| Zugg Software | 2 |
| Zugo | 2 |
| Zultys | 2 |
| ZD Soft | 2 |
| ZoneLabs, Inc. | 2 |
| ZONER software | 2 |
| Z-Systems | 2 |
| Zabkat | 2 |
| Zone Labs | 3 |
| Zimbra | 3 |
| ZyXEL | 3 |
| Zondervan | 4 |
| Zuken | 4 |
| Zinio | 4 |
| Zoom | 4 |
| ZOHO | 5 |
| Zango | 5 |
| ZixCorp | 5 |
| Zeiss | 5 |
| ZOLL Data Systems | 6 |
| Zenith Infotech | 6 |
| Ziff-Davis Media | 7 |
| Zeacom | 7 |
| Zend Technologies | 14 |
| ZTE | 14 |
| Zebra | 14 |