| PHAT Consulting | |
| phaydon | research+consulting GmbH & Co. KG | North Rhine-Westphalia |
| PHCOM Informatik | Baden-Württemberg |
| Phelas GmbH | |
| PhenoSys GmbH | |
| Phenox GmbH | |
| Phg Peter Hengstler GmbH & Co. KG | Baden-Württemberg |
| phi IT-Services GmbH | |
| Phi Mobile Media Services GmbH | Hamburg |
| phi...philipp.haudek.informatik.GmbH | |
| Phialogics AG | |
| Philipp Hauer | |
| Philipp König Grafik- und Webdesign | North Rhine-Westphalia |
| Philipp Reisener Internetmarketing | Lower Saxony |
| Philipps-Universität Marburg | |
| Philipps-Universität Marburg - Fachbereich Mathematik und Informatik | Hesse |
| Phillip Berndt | Lower Saxony |
| Philosoft Datenschutz GmbH | |
| Philotech Systementwicklung und Software GmbH | Bavaria |
| PHOENIX CONTACT HMI-IPC Technology GmbH | Baden-Württemberg |
| Phoenix EDV-Systeme GmbH | North Rhine-Westphalia |
| Phoenix Games Holding GmbH | |
| Phoenix Media GmbH | Baden-Württemberg |
| Phonea by GS-Büroservice Gummersbach & Schiffler GbR | North Rhine-Westphalia |
| PHONEATTACK Telekommunikations Vertriebs GmbH | Baden-Württemberg |
| Phonesty GmbH | Bavaria |
| phonostar GmbH | Hamburg |
| Phortas GmbH | |
| Photo-freeware | North Rhine-Westphalia |
| Photon Engine | Hamburg |
| Photonics21 | North Rhine-Westphalia |
| PhotoshopTtutorials.de | Mecklenburg-Vorpommern |
| PHP Kurs | Lower Saxony |
| PHP Space Community | Thuringia |
| PHP Usergroup HH | Hamburg |
| PHP-Kurs.com | Rhineland-Palatinate |
| phpBB6.de | Lower Saxony |
| phpMyFAQ | Bavaria |
| PHPUnit | |
| Physalis | Berlin |
| Phytec Messtechnik GmbH | Rhineland-Palatinate |
| Phytron GmbH | Bavaria |
| PI Informatik GmbH | |
| PI Integral Solutions Ltd | |
| PI Photovoltaic-Institute Berlin AG | Berlin |
| PI-Data AG | Baden-Württemberg |
| pi.pe GmbH | Berlin |
| Pi4 Robotics GmbH | Berlin |
| PIA UDG | Hamburg |
| Pic Master | Berlin |