| Leaf Investments | |
| LEAP Legal Software | |
| LearnUpon | |
| Legacy Communications | |
| Lero | Limerick City and County Council |
| LetsHost | Dublin City Council |
| Letterkenny Institute of Technology | Donegal County Council |
| Lex Consultancy | |
| lib-lab | Dublin City Council |
| Liberty IT | |
| Limerick Computers | Limerick City and County Council |
| Limerick Institute Of Technology | Limerick City and County Council |
| Linked Finance | |
| Litho Circuits Ltd | Limerick City and County Council |
| Local SEO Ireland | |
| Loci Orthopaedics | |
| Logentries | Dublin City Council |
| Logicode | |
| Low Cost Digital | |
| 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 |
| Magento Developer | |
| Magic Media | |
| Magnet Networks Ltd | Dublin City Council |
| Mail Metrics | |
| Mainstay Medical International plc | |
| Mainstream Renewable Power | |
| Malin plc | |
| Manna Design | |
| Manna Drone Delivery | Dublin City Council |
| Marama Labs | |
| Marazzini Communications | Meath County Council |
| Marble Multimedia | Donegal County Council |
| Marino Institute of Education | |
| Marino Software Ltd | |
| Marketing Inputs | |
| Márla Communications | |
| Martec Web Design | Galway City Council |
| Martinsen Mayer | Dublin City Council |
| Marvao Medical Ltd | |
| Matrix Internet | Dublin City Council |
| Maven Hunt | Dublin City Council |