| Company | Type | Based in | Founded |
|---|---|---|---|
| Zappos | website, online shop, business | Las Vegas | 1999 |
| ZeniMax Online Studios | video game developer | Hunt Valley | 2007 |
| Zenit News Agency | news agency, publishing house | Alpharetta | 1997 |
| Zipper Interactive | video game developer | Redmond | 1995 |
| Zippo | privately held company | Bradford | 1932 |
| Zombie Studios | video game developer | New-York Tribune | 1994 |