| Fastcom Broadband | Dublin City Council |
| FCDM | |
| FCR Media | |
| FeelTect | |
| Fenergo | Dublin City Council |
| Fexco Financial Services | |
| Fibrepulse | Mayo County Council |
| Financial Risk Solutions | |
| Finclude | |
| Fineos Corporation UC | Dublin City Council |
| Finn Media Marketing | |
| FinReg Global | |
| Fintech Ireland | |
| Finwise Ltd | |
| Fire Financial services Ltd | Dublin City Council |
| FIRE1 | |
| Fireball Media | Cork City Council |
| Firecomms Ltd | Cork City Council |
| Fixational Ltd | |
| Flexiwage Ltd | |
| FlexManager | |
| FlexTime Ltd | Dublin City Council |
| Flightman | Fingal County Council |
| Flipdish | Dublin City Council |
| FlowForma | |
| Fluid Software Ltd | Dún Laoghaire-Rathdown County Council |
| Fluidedge | Dublin City Council |
| FMG Electronics Ltd | Kilkenny County Council |
| Fonez | Galway City Council |
| Fonoa Technologies Ltd | |
| Foreign Exchange Clearing House Ltd | |
| Forward Emphasis | |
| Fountain Healthcare Partners | |
| Four Js Development Tools Europe Ltd | Cork City Council |
| Four Theorem | |
| Frank Prendergast | Cork City Council |
| Fresco | |
| Friday | |
| Frontend.com | Dublin City Council |
| Frontline | Dublin City Council |
| Fuel | |
| Full Circle Digital Marketing | Dublin City Council |
| Furthr | |
| Furthr | |
| Fusio Ltd | Dublin City Council |
| Future Business | Dublin City Council |
| FutureRange Ltd | Dublin City Council |
| Gaelic Laboratories | |
| Galvia AI | |
| Galway Technology Centre | Galway City Council |