| Raspberry Pi Guide | Bavaria |
| Rasterpunkt GmbH | Baden-Württemberg |
| Rat & Tat Beratungsgesellschaft mbH | Hamburg |
| Rateit.cool | Baden-Württemberg |
| RatePAY GmbH | Berlin |
| Ratio GmbH | Schleswig-Holstein |
| Ratiokontakt GmbH | Bavaria |
| Rationalisierung u. Rechentechnik mbH | Baden-Württemberg |
| Ratiopharm GmbH | |
| Ratioplast Electronics H. Wiedemann GmbH | North Rhine-Westphalia |
| Ratiosoft GmbH | |
| Ratiotec GmbH & Co. KG | North Rhine-Westphalia |
| RATO-Systems | |
| RAUM | |
| Raumedic AG | |
| Raumobil GmbH | |
| Raumopol | Lower Saxony |
| Raumstation Coworking | |
| Raumstation GbR | |
| RAUSCHER GmbH | Bavaria |
| Rausoft GmbH | Baden-Württemberg |
| Rave Space | |
| RAVINIA Marketing GmbH | North Rhine-Westphalia |
| Ray Sono GmbH | |
| Rayen Intec GmbH | Thuringia |
| Razor Group | |
| Razorcat Development GmbH | Berlin |
| RB Capital GmbH | |
| RB Media Group GmbH | Brandenburg |
| RBS GmbH | Saxony |
| RBS Netkom GmbH | |
| RC Management Consult GmbH | Bavaria |
| RC-Jetprint | |
| RCS Audio-Systems GmbH | Bavaria |
| RCS Richter Computer Systemhaus GmbH | Brandenburg |
| RD Computer Service | Saarland |
| RD Consulting UG (haftungsbeschränkt) | Baden-Württemberg |
| RDS Energies GmbH | |
| rdts AG | Rhineland-Palatinate |
| RE'FLEKT GmbH | |
| re-elektronik GmbH & Co. KG | Bavaria |
| Re-Link Daten & Kommunikationssyteme GmbH & Co. KG | Bavaria |
| re:cap Technologies GmbH | |
| REACH Finance GmbH | |
| Reachnet GmbH | |
| React Day Berlin | Berlin |
| Reactive Design Patterns | |
| Reactive Robotics GmbH | |
| Reakktor Media GmbH | Lower Saxony |
| Reaktor.Berlin | |