| ITRDN Technologies Ltd | Lagos |
| ITRealms Online | Lagos |
| ITSkillsCenter | |
| IXNote | |
| J-Mouse Technologies Ltd | Edo |
| Jaflah Software Development Company | |
| Jaiz Bank plc | Federal Capital Territory |
| Jamesgab | |
| Jidaw Systems | Lagos |
| Jigawa State Polytechnic, Dutse | |
| JITSolutions | |
| Jobberman | Lagos |
| Joseph Ayo Babalola University, Osun State | |
| Joseph Sarwuan Tarka University | |
| Joseph Sarwuan Tarkaa University, Makurdi | |
| Jrango Technology | |
| JTec Solutions | Lagos |
| Jumia | Lagos |
| Jumia Nigeria | |
| Juray Smart Solutions Ltd | |
| Just Electon | |
| Kaduna Polytechnic | |
| Kaduna Polytechnic | |
| Kaduna State University | |
| Kaduna State University | |
| Kajab Engineering Services | |
| Kang.ng | |
| Kano State Polytechnic | |
| Kano University of Science and Technology | |
| Kbrdata | |
| Kebbi State University of Science and Technology | |
| Keembest Software Solutions Ltd | |
| KEK Technology Co. | Lagos |
| KEKhosting | Lagos |
| Ken Saro-Wiwa Polytechnic Bori | |
| Kespodak | |
| Keystone Bank | Lagos |
| Kings Polytechnic, Ubiaja | Edo |
| Kings University | Osun |
| Kinsolve Solutions | |
| KITS Technologies | Lagos |
| Kobo360, Inc. | Lagos |
| Kogi State Polytechnic | |
| Kogi State University | |
| KolaDaisi University | Oyo |
| Kollash Business & Technologies Ltd | Lagos |
| KoloPay | Lagos |
| Konga | Lagos |
| Kreateng | |
| Kuda Technologies Ltd | Lagos |