| Prime Carrier | Dublin City Council |
| Principal Logistics Technologies | Dublin City Council |
| Priothera Ltd | |
| Priviti Management Services Ltd | |
| Pro SEO Ireland | |
| Process | Dublin City Council |
| Process 3D | |
| ProcurementExpress.com | |
| Professional Development | |
| Professional Training Solutions Ltd | Dublin City Council |
| Project Central | |
| Project Objects Ltd | Meath County Council |
| Proposition One (Ireland) Ltd | |
| ProStrategy | Dublin City Council |
| Protego Technologies Ltd | Meath County Council |
| Protex AI | |
| Prothena Corporation plc | |
| ProVerum Ltd | |
| Provideam Ltd | Dublin City Council |
| Provizio Ltd | |
| PSRA Ltd | Wicklow County Council |
| Púca Technologies Ltd | Dublin City Council |
| Pure Telecom | Dublin City Council |
| Pyramid Consulting Ltd | Dublin City Council |
| Python Ireland | Dublin City Council |
| Q1 Scientific | |
| QAD Precision | Dublin City Council |
| QMS Software Ltd | Dún Laoghaire-Rathdown County Council |
| Qualcom | Dublin City Council |
| Qualio | |
| Quest Computing Ltd | Dublin City Council |
| Quest Systems | |
| RadioactivePages.com | Dublin City Council |
| Radiomation | Roscommon County Council |
| RadiusTechnologies | Waterford City and County Council |
| Rage4 Networks Ltd | Dublin City Council |
| Rainbow Communications | Dublin City Council |
| Rainmaker Business Technologies | |
| Real World Analytics | |
| realTime | Dún Laoghaire-Rathdown County Council |
| Realtime Technologies Ltd | Dublin City Council |
| Reconcile Engineering Ltd | Dublin City Council |
| RED C Research & Marketing Ltd | |
| Red Flag | Dublin City Council |
| Red Hot Web Design | |
| Redbrick | Dublin City Council |
| RedFly Ltd | Dublin City Council |
| Redline Studios | |
| Reflective Measurement Systems Ltd | |
| Register.ie | Dublin City Council |