| Xabe Tomasz Żmuda | |
| Xaipix Sp. z o.o. | |
| Xann Marketing | Lesser Poland |
| Xantum | |
| Xantum Sp. z o.o. | |
| xBerry Sp. z o.o. | |
| XBS Group | |
| Xcactus Sp. z o.o. sp.k. | |
| Xerrex | Subcarpathian |
| Xevin Investments | Masovian |
| xFAANG | Masovian |
| XGATE | Silesian |
| Xopero Software | |
| Xperience-Digital.com | Masovian |
| XPG Factor | |
| XPLUS S.A. | Masovian |
| Xpress Delivery | |
| XPTL S.A. | Lower Silesian |
| XTRF Management System Ltd | Lesser Poland |
| Yagi | Lesser Poland |
| Yamo Sp. z o.o. | Lower Silesian |
| YarMobile | Pomeranian |
| Yax Software | |
| Yellow Dot | |
| Yellowgray Group Sp. z o.o. | Lesser Poland |
| Yellows | |
| Yes24 | Pomeranian |
| Yetiz Interactive | Pomeranian |
| Yojji | |
| Yolk | |
| YouDigital Sp. z o.o. | |
| Youngmedia | Silesian |
| YouNick Technology Park Sp. z o.o. | |
| YSBM Group Sp. z o.o. | Lesser Poland |
| yStudio | Subcarpathian |
| Yupo.pl S.C. | Warmian-Masurian |
| Z-ITS | Silesian |
| Z-Labs | Pomeranian |
| Z.P.U.H. WALDI Waldemar Sztygiel | Łódź |
| z3x Tech Care Group | |
| Z8.Software House Sp. z o.o. | |
| Zabart | Warmian-Masurian |
| Zachodniopomorska Szkoła Biznesu - Akademia Nauk Stosowanych | |
| Zachodniopomorski Uniwersytet Technologiczny w Szczecinie | West Pomeranian |
| Zachodniopomorski Uniwersytet Technologiczny w Szczecinie - Wydział Informatyki | West Pomeranian |
| Zakład Informatyki Stosowanej Pixel | Greater Poland |
| Zakład Systemów Komputerowych ZSK Sp. z o.o. | Lesser Poland |
| Zakładu Grafiki Komputerowej | Masovian |
| Zamel Sp. z o.o. | Silesian |
| zasoby.pl | Masovian |