| Pharmathen S.A. | |
| Phasmatic | Ionian Islands |
| PI-Systems International | Attica |
| Piraeus Financial Holdings | |
| Plaisio Computers | Attica |
| Planetek Hellas | |
| Play247 | Attica |
| Plegma Labs S.A. | |
| PlugSecure | |
| Plushost.gr | Attica |
| Point Blank | Central Macedonia |
| Pointer O.E. | Attica |
| Porcupine Colors | Central Macedonia |
| Positron S.A. | Attica |
| Power Team | |
| PowerApp Developers | |
| PowerX.tech | |
| Premium IT | |
| Presence on the web | Attica |
| Prismart | |
| Privenet | Attica |
| Profile Software | Attica |
| ProGnosis Biotech S.A. | |
| Project Agora | Attica |
| ProjectWeb | Attica |
| Prometheus Dgtl PC | |
| Pronet S.A. | |
| Prosvasi.gr | Attica |
| Protio | |
| PROTOCOL | |
| PROWEB | |
| Psomiadis Web Development & Digital Marketing | |
| Publisto Ltd | |
| Purposeful | |
| Pyrseia Informatics | |
| Qbrains | |
| QIVOS | Attica |
| Quadraweb Technologies GP | |
| Qualco | |
| Qualitis S.A. | |
| Quality & Reliability Α.Ε. | Attica |
| Quest | Attica |
| Quintessential | |
| Quintessential | |
| QWise Technologies | |
| R-U | |
| Radio Piraeus Electronics | Attica |
| Rainhost Solutions | Attica |
| rapidbounce | |
| Raycap S.A. | Attica |