| FRILO Software GmbH | Baden-Württemberg |
| Fritsch GmbH | Baden-Württemberg |
| Fritz J. Mörtlbauer | Bavaria |
| Fritz Kübler GmbH | Baden-Württemberg |
| Fritz Managed IT GmbH | Bavaria |
| Fritz+Frölich Umweltinformationssysteme GmbH | Thuringia |
| Frobenius-Institut | |
| Frobese GmbH | Lower Saxony |
| Frologic GmbH | Hamburg |
| Fromos GmbH | Saxony |
| Fronstastic | |
| Fröse Multimedia | North Rhine-Westphalia |
| Frred Software GmbH | Baden-Württemberg |
| FRS GmbH & Co. KG | |
| fruitcore robotics GmbH | |
| fruux GmbH | North Rhine-Westphalia |
| FSG Fernsteuergeräte Kurt Oelsch GmbH | Berlin |
| FSI Informationssysteme e.K. | Baden-Württemberg |
| FSP GmbH | North Rhine-Westphalia |
| FTAPI Software GmbH | |
| FTUG Frankfurt TYPO3 User Group | Hesse |
| FUCHS | |
| FUCHS EDV Vertriebs GmbH | Hamburg |
| Fuchs Elektronik GmbH | Rhineland-Palatinate |
| Fuel Protocol GmbH | |
| FuG Elektronik GmbH | Bavaria |
| FUHRPARK Software GmbH | Saxony |
| Fullsail Systems | |
| Fully Kisok | |
| Fun-Soft | Saxony-Anhalt |
| Funatics Software GmbH | North Rhine-Westphalia |
| Funck Optics | |
| funct GmbH | |
| Functional Aesthetics GmbH | |
| functions-online | Lower Saxony |
| FundaMental Pharma GmbH | |
| FunderNation | Hesse |
| Funk-Electronic Piciorgros GmbH | North Rhine-Westphalia |
| Funkanlagen-Elektronik Heinz Reuss GmbH | Hamburg |
| Funkbüro Medien & Gestaltung GmbH | Hamburg |
| FUNKE Mediengruppe GmbH & Co. KGaA | |
| Fürstenberg Webdesign | Hamburg |
| Fusio | North Rhine-Westphalia |
| Fusion Bionic GmbH | |
| FusionReactor | Baden-Württemberg |
| FuTec GmbH | Saxony |
| FUTRIS | Saxony |
| Futur-Zwei - Billhardt, Frese, Reiling GbR | Hamburg |
| Future Demand GmbH | |
| Future Energy Ventures Management GmbH | North Rhine-Westphalia |