| Wizards Dev | |
| WizArt | Kiev |
| Wnet | Kiev |
| WonderWeb | |
| Work.ua | |
| Worksection | |
| Worldwide Manufacturing | Kiev |
| WOXAPP | |
| Wphost | Kiev |
| WPWP Ltd | |
| Wtech | |
| X-Ray Contact | |
| X-tend Internet Solutions | Kiev |
| Xelentec | Kiev |
| XMLlogistics | |
| xorum.io | Kharkiv |
| Xwavesoft | |
| Yako | Kharkiv |
| Yalantis | |
| YAM Agency | |
| Yarandin, Inc. | Kiev |
| YarLAB | |
| YaVKursi | |
| Yaware | |
| Yedynka | Kiev |
| Yellow Leaf Technologies | Ivano-Frankivsk |
| Yelpix, LLC | Sumy |
| YEP Accelerator | |
| YoloLogic | |
| YouControl | |
| YourQuery S.R.O. | |
| YouScan | Kiev |
| Yrwhost | Kiev |
| Yual | |
| Yuqio, LLC | Kiev |
| YURiA-PHARM LLC | |
| Yuriy Polishchuk | |
| Zadarma | Zaporizhzhia |
| Zade | |
| Zagrava Games | |
| ZakonOnline | |
| Zanzarra | Lviv |
| Zapal | |
| Zapleo | Dnipropetrovsk |
| Zaporizhzhia National University | Zaporizhzhia |
| Zaporizhzhia Polytechnic National University | Zaporizhzhia |
| Zaycev.studio | Chernivtsi |
| ZBS Capital | |
| Zeeks | |
| Zeema | Kiev |