| Johannes Kepler Universität Linz - Institut für Graphische und Parallele Datenverarbeitung | Upper Austria |
| Johannes Kepler Universität Linz - Institut für Wirtschaftsinformatik Software Engineering | Upper Austria |
| Johannes Kepler University - Department of Computer Science | Upper Austria |
| Johannes Kepler University - Research Institute for Symbolic Computation | Upper Austria |
| Johannes Kepler University Linz - Department of Knowledge-Based Mathematical Systems | Upper Austria |
| Joinvision e-Services GmbH | Vienna |
| JOP - Java Optimized Processor | Vienna |
| Josef Pötzl | Carinthia |
| Journi GmbH | |
| Junior Enterprises Austria | |
| K2netsolutions Consulting GmbH | Vienna |
| Kaindl Informatics GmbH | Styria |
| Kaleido AI GmbH | |
| Kappa Filter Systems GmbH | |
| Kapper Network-Communications GmbH | Vienna |
| Kapsch TrafficCom AG | |
| Karel Krobath | Lower Austria |
| Karl Salbrechter | Carinthia |
| Karl-Franzens-Universität Graz | Styria |
| KarlDeutsch IT Consulting & Solutions | Burgenland |
| KARO DATA Datenverarbeitung Ges.m.b.H | |
| karriere.at GmbH | Upper Austria |
| KEBA AG | Upper Austria |
| KESS Power Solutions GmbH | Lower Austria |
| KGUB GmbH | Styria |
| kick-image | Upper Austria |
| Kimai | |
| KingBill GmbH | Vienna |
| Kirchliche Pädagogische Hochschule Edith Stein | Tyrol |
| Kirschner Webdesign | Upper Austria |
| Kivu Technologies GmbH | Vienna |
| Kiweno GmbH | |
| Klaiton Advisory GmbH | |
| Knapp AG | Styria |
| Koala-Framework | Salzburg |
| Kobald Electronic Geräte GmbH | Vienna |
| Koch Media | Tyrol |
| Kommunalkredit Austria AG | |
| Konica Minolta Business Solutions Austria GmbH | Vienna |
| Körbler GmbH | Styria |
| Kost Software GmbH | Styria |
| Kraft.Crowd | |
| KraftCom | Lower Austria |
| Krankenhaus Informations Systeme GmbH | Vienna |
| kreitner & partner werbegesellschaft m.b.H | |
| Kreml & Co GesmbH | Vienna |
| Kreml & Co. GmbH | Vienna |
| KREMSER GesbR | Styria |
| KRO4PRO | Salzburg |
| Krumböck Bernd | Lower Austria |