| Ivorysoft | |
| IWA.expert | |
| IZZI Studio | Kiev |
| Iнститут фізичної оптики iменi О. Г. Влоха | |
| Jam Digital | |
| Jappware | |
| Jaws | Kiev |
| JellyFish.tech | Zaporizhzhia |
| JetSoftPro, LLC | |
| JEVERA Software Solutions | Kiev |
| JMind | |
| Jobs4Jobs | Dnipropetrovsk |
| JOBstudio | |
| Joomla! - Українська Спільнота | Kiev |
| JORANGE | |
| JSN | Zaporizhzhia |
| jSolutions | |
| JUMP.team | |
| Junior IT | |
| JustCoded | |
| Justwell Ltd | |
| Kalion.Digital | |
| Kanz Software | Odessa |
| Kapowai | Kiev |
| KAPPS | |
| Karpatia Benefits | |
| Kavoon | Kiev |
| Keenethics | |
| KeyCRM | |
| KeyUA | |
| Kharkiv IT Cluster | |
| Kharkiv National Medical University | Kharkiv |
| Kharkiv National University of Internal Affairs | Kharkiv |
| Kharkiv Polytechnic Institute | |
| KharkivJS | Kharkiv |
| Kiev Perl Mongers | Kiev |
| KievISP | Kiev |
| Kifreez Ltd | |
| Kindgeek | |
| Kit Global Agency | |
| KitSoft | |
| KitWeb | |
| Kivi | |
| Klookva | |
| KM Core | Kiev |
| Knopka | |
| Komanda | |
| KOmP Systems | Kiev |
| Konica Minolta Business Solutions Ukraine | Kiev |
| Kooperativ | |