| Micromail | Cork City Council |
| Micron Agritech | |
| Microsoft Ireland | Dún Laoghaire-Rathdown County Council |
| Microsphere Technology Ltd | |
| Microwarehouse Ltd | |
| MIDAS Ireland | Cork City Council |
| Millenium Software | Cork County Council |
| Mint Tek | |
| MinuteBuyer Corporate Services Ltd | Dublin City Council |
| Mizenonline | Cork City Council |
| MJ Flood Technology | Dublin City Council |
| MML Capital Ireland | |
| mobiForge | Dublin City Council |
| Mobil Information Systems | Fingal County Council |
| Modeva | Dún Laoghaire-Rathdown County Council |
| Motherboard Ltd | Dublin City Council |
| MSD Ireland | |
| mSemicon | Dublin City Council |
| Multimedia.ie | Dún Laoghaire-Rathdown County Council |
| Munster PC Solutions | Limerick City and County Council |
| Munster Technological University | Cork City Council |
| Murray Consultants | |
| Myhost.ie | Dublin City Council |
| MyIT Ltd | Dublin City Council |
| MyMoneyPlatform | |
| mySatNav | Dún Laoghaire-Rathdown County Council |
| MySay | Dublin City Council |
| MyWallSt Ltd | |
| Natcom Ireland Ltd | Dublin City Council |
| National College of Ireland | Dublin City Council |
| National Space Center | |
| National University of Ireland - School of Computer Science | Galway City Council |
| National University of Ireland Galway | |
| National University of Ireland Maynooth - Brain and Computation Lab | Kildare County Council |
| National University of Ireland, Galway | Galway City Council |
| National University of Ireland, Maynooth - Department of Mathematics | Kildare County Council |
| National University of Ireland, Maynooth - Hamilton Institute | Kildare County Council |
| Navitas Software Ltd | |
| NCL Technologies Ltd | Dublin City Council |
| NDRC | Dublin City Council |
| Neal Walsh | Dublin City Council |
| Nearform | |
| Nemysis Ltd | |
| Neo-Archaic | Dublin City Council |
| Net Affinity | Dublin City Council |
| Netcomm | Dublin City Council |
| NetLync | |
| Network Ireland | |
| Neurent Medical | |
| Neuromod | |