| Limerick Institute Of Technology | Limerick City and County Council |
| Linked Finance | |
| Lios | |
| Litho Circuits Ltd | Limerick City and County Council |
| Local SEO Ireland | |
| Loci Orthopaedics | |
| Logentries | Dublin City Council |
| loyalBe Ltd | |
| LoyLap | |
| Ludgate Hub | |
| Luminate Medical | |
| Luna Systems | |
| Luzern | Dublin City Council |
| Luzern eCommerce | |
| M&M Qualtech Ltd | Galway City Council |
| MAC Ltd | Limerick City and County Council |
| Macrovision Creative Software | Dún Laoghaire-Rathdown County Council |
| Magic Media | |
| Magnet Networks Ltd | Dublin City Council |
| Mail Metrics | |
| Mainstay Medical International plc | |
| Mainstream Renewable Power | |
| Malin plc | |
| Manna Drone Delivery | Dublin City Council |
| Marazzini Communications | Meath County Council |
| Marble Multimedia | Donegal County Council |
| Marino Software Ltd | |
| Martec Web Design | Galway City Council |
| Martinsen Mayer | Dublin City Council |
| Marvao Medical Ltd | |
| Matrix Internet | Dublin City Council |
| Maven Hunt | Dublin City Council |
| Maynooth University | Kildare County Council |
| Maynooth University - Computer Science | Kildare County Council |
| MDS Gateways | Dublin City Council |
| MEANWEB | |
| Measuresoft Development Ltd | Cork City Council |
| Mechatrons | Wicklow County Council |
| Media Cube | Dún Laoghaire-Rathdown County Council |
| Media Science Technology | Dún Laoghaire-Rathdown County Council |
| Mediahouse | Laois County Council |
| Medical Technology Ireland | |
| Mentea | Fingal County Council |
| Mercury Software Ltd | |
| MerrionIT | Dublin City Council |
| Metabolomic Diagnostics | |
| Metalogic | Galway City Council |
| MIAS Pharma Ltd | |
| Michael Harrington | Roscommon County Council |
| Microfinance Ireland | |