| Prodlane | |
| Prodress Software GmbH | North Rhine-Westphalia |
| Product Service Kip GmbH | Lower Saxony |
| ProductDock AG | |
| productive-data GmbH | |
| Products Up GmbH | |
| productware GmbH | |
| Produktkramer GmbH | Hamburg |
| PRODYNA SE | Hesse |
| ProDyne GmbH | North Rhine-Westphalia |
| PROEMION GmbH | Hesse |
| Prof. Becker GmbH | North Rhine-Westphalia |
| Prof. Dr. Claudia Alfes | |
| Prof. Dr. E. Neuburger & Partner GmbH | Bavaria |
| Professional Com GmbH | Saxony |
| PROFI Engineering Systems AG | Hesse |
| Profi-Software Engineering GmbH | Baden-Württemberg |
| Profi-Software Guzy | Hamburg |
| PROFIBUS Nutzerorganisation e.V. | Baden-Württemberg |
| Proficloud.io | |
| Proficom | Saxony |
| Profihost AG | Lower Saxony |
| Profil Institut für Stoffwechselforschung GmbH | |
| Profil Systems GmbH | Lower Saxony |
| Profil-Dienstleistungen cc GmbH | |
| Profineon-Infoseite | Rhineland-Palatinate |
| PROFITECH GmbH | Saarland |
| ProFontis Software GmbH & Co. KG | Hamburg |
| Proforma GmbH & Co. KG | Berlin |
| Profy | |
| Progegno GbR | Lower Saxony |
| PROGEN Biotechnik GmbH | |
| ProGlove | |
| programat4 | Hesse |
| Programming Helper | |
| Progressio Consulting GmbH | Lower Saxony |
| Progroup AG | |
| Progtech GmbH | |
| prointernet GmbH & Co. KG | Rhineland-Palatinate |
| Project 2000 GmbH | North Rhine-Westphalia |
| Project A Services GmbH & Co. KG | Berlin |
| Project A Ventures Management GmbH | |
| Project Consult GmbH | Hamburg |
| Project Nexus Germany GmbH | |
| ProJect Pharmaceutics GmbH | |
| Project33 | North Rhine-Westphalia |
| Projector Software GmbH | Baden-Württemberg |
| ProjectWizards | Lower Saxony |
| Projekt Software GmbH | Lower Saxony |
| Proklang GbR | Thuringia |