| IT Pro Quote | Sligo County Council |
| IT Search | |
| IT Staff Recruitment | Wicklow County Council |
| it@cork Association Ltd | Cork City Council |
| ITBits.ie | Dublin City Council |
| Jack Kinsella | |
| JBM | Dún Laoghaire-Rathdown County Council |
| Jobbio | |
| Johnson Controls | |
| Jones Business Systems | |
| Joomla51 | Sligo County Council |
| Joomlage.com | Clare County Council |
| Juvenescence | |
| Kayna Innovation Ltd | |
| KD Electronics | |
| Kedington Ltd | Dublin City Council |
| Keelvar | |
| Kelsius Ltd | |
| Ken Little Design Studio | Galway City Council |
| Kennedy Software and Systems Ltd | South Dublin County Council |
| Kerna Communications Ltd | Dublin City Council |
| Kernel Capital | Cork City Council |
| Kernel Software | Dublin City Council |
| Keywords Studios plc | |
| Kieran O’Connor | Cork City Council |
| Kildare Web Services | Kildare County Council |
| Kinesis Software | Kildare County Council |
| Kingswood Computing | Dublin City Council |
| Kite Medical | |
| Klas | |
| Konvi | |
| Kota | |
| Kyckr Ireland Ltd | |
| Lancetech | |
| Lantel | Limerick City and County Council |
| Larian Studios | Dublin City Council |
| Laser Computer Sales | Dublin City Council |
| Layer | |
| LBS Partners | |
| LCD Direct Ltd | Cork City Council |
| Leaf Investments | |
| 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 |