| NetCraft Computers Ltd | Kiev |
| Netframe | |
| NetHunt | |
| NetLS | |
| Netstat Space | Kirovohrad |
| NetVision | |
| Network Software Solutions | Kiev |
| NeuString | Dnipropetrovsk |
| New Line Technologies | |
| New Normal | |
| New Vision, LLC | |
| Newsoft | |
| NewtonIdeas | Kiev |
| Next Door Coders | |
| Nineva Studios | |
| NIS | Kiev |
| Nitrix | |
| Nix Solutions Ltd | Kiev |
| Noble.codes | |
| NodeArt Soft Ukraine, LLC | Kiev |
| Nolt Technologies, LLC | |
| Not The Same | |
| Nullgravity | Kiev |
| O3 | Kiev |
| Oak & Bluebird Studio | |
| Octa Energy | |
| Octopus Agency | |
| ODDIN | |
| Odessa National University of Economics | |
| OdesSeo | |
| Okna.com.ua | Kiev |
| Oko Camera | |
| OmegaTelecom | Kiev |
| Ondevia | |
| One Logic Soft | |
| Onix | Kiev |
| Online Documentation Server | Kiev |
| Onpage School | |
| OntargIT LLC | Kiev |
| OOO "BSCom" | Odessa |
| OOO "ПростоХостинг" | Kiev |
| Opensource.com.ua | Kiev |
| OrangeOrange | |
| Orbinix | |
| Osavul | |
| osCommerce Manager | |
| OSDN | Kiev |
| Otakoyi | |
| Out of the Box Systems | |
| Outsourcing Ukraine | Zaporizhzhia |