| iZettle AB | Stockholm |
| J12 | |
| Jajja Media Group AB | Stockholm |
| jAlbum | Stockholm |
| Jappa | |
| Jatech AB | |
| Jeeves ERP | Stockholm |
| Jeff Minard | Stockholm |
| Jenving Technology AB | Västra Götaland |
| Jetshop | Västra Götaland |
| Jetson AB | |
| Jetty | |
| JNT | Stockholm |
| Jobtip | |
| Jobylon | |
| Joina.io | |
| Joinville Sverige AB | |
| Jondetech Sensors AB | |
| Jönköping University | Jönköping |
| Jonna AB | |
| Jotech Design AB | |
| JULI | |
| Jumpgate AB | |
| Junet AB | |
| Juni | Västra Götaland |
| Just Arrived | |
| Just Football | Stockholm |
| Just-In-Mind AB | Stockholm |
| Justic | |
| JustInCase | |
| JW Webbdesign | |
| Kale United | |
| Kalix Tele24 AB | Stockholm |
| Kalmar NDC | Kalmar |
| Kalmstrom Enterprises AB | Kalmar |
| Kameo Svensk Filial | |
| KAMTechnology | |
| Kancera AB | |
| Kappa Bar AB | |
| Karlstads universitet | Värmland |
| Karlstads universitet - Datavetenskap | |
| Karmalicious AB | |
| Kärnfull Next AB | |
| Katam Technologies AB | |
| Kattalo AB | |
| Kattis | |
| KDAB Group | Värmland |
| Kebitz AB | |
| Kennedy Group AB | |
| Kichi Invest AB | |