| KT-NET Communications GmbH | Lower Austria |
| KTCHNG GmbH | |
| L.B.G., Hard- & Software | Vienna |
| L.i.S.A Software | Carinthia |
| LabelArt WebDesign | Lower Austria |
| Labor C Webengineering GmbH | Vienna |
| LANIT Service GmbH | Vienna |
| LAPP Austria GmbH | Upper Austria |
| LARsys-Automation GmbH | Upper Austria |
| Latschbacher GmbH | Upper Austria |
| LB-systems Meßgeräte GmbH | Vienna |
| LEAD-TECH Betrieb und Beratung GmbH | |
| LearnConsult | Styria |
| Ledl.net GmbH | Salzburg |
| LegalTegrity GmbH | |
| Legrand Austria GmbH | Vienna |
| Lektor | Carinthia |
| Leon Berger KG | Vienna |
| Leoni Software GmbH | Vorarlberg |
| Levatis Software Service GmbH | Vienna |
| Lexogen GmbH | |
| LieberLieber Software GmbH | Vienna |
| Life Design | Lower Austria |
| Lifebrain COVID Labor GmbH | |
| LiLO Holding GmbH | |
| LimeSoda Interactive Marketing GmbH | Vienna |
| Linde Verlag Ges.m.b.H | |
| LingoHub GmbH | |
| LinkResearchTools GmbH | Vienna |
| Linux User Group Austria | Vienna |
| Linux User Group Sankt Pölten | Lower Austria |
| Linux User Group Vorarlberg | Vorarlberg |
| Linux User Krems | Lower Austria |
| LinzNet Internet Service Provider GmbH | Upper Austria |
| LIWEST-Kabelmedien GmbH | Upper Austria |
| LOGICDATA Electronic & Software Entwicklungs GmbH | Styria |
| Lohn & HR GmbH | Salzburg |
| Lovely Systems GmbH | Vorarlberg |
| Luca Hammer | Vienna |
| Ludwig Boltzmann Gesellschaft | |
| LXCluster | Vienna |
| MAD Ventures GmbH | |
| Magenta | Vienna |
| MAIA.tools GmbH | |
| Maker Austria | |
| Manfred Schaden KG | Vienna |
| mangoART GmbH | Upper Austria |
| Manjaro Linux | Vienna |
| Manuel Schmöllerl | Vienna |
| Marinomed Biotech AG | |