Steam Publishers with the letter U
| Name | Apps Count |
|---|---|
| Ubisoft | 500 |
| Ultimate Games S.A. | 74 |
| United Independent Entertainment | 73 |
| Untold Tales | 72 |
| USC Games | 41 |
| USANIK STD | 28 |
| USERJOY Technology Co.,Ltd. | 26 |
| UL | 22 |
| UpgradePoint | 19 |
| Unbound Creations | 17 |
| UPCELL TELEKOMUNIKASYON LIMITED SIRKETI | 16 |
| upjers | 16 |
| U-tad | 16 |
| Ubisoft Entertainment | 15 |
| UQAT - Création et nouveaux médias | 14 |
| United Label | 13 |
| USM | 12 |
| Unknown Worlds Entertainment | 12 |
| Uzura Studio | 12 |
| Uintani | 10 |