| Hungarian Investment Promotion Agency | |
| Hungarian National Authority for Data Protection and Freedom of Information | Budapest |
| Hungarian Robot Builders Association | |
| Hungarian SEO Agency | Vas |
| Hungarnet | Budapest |
| Hungaro DigiTel Kft. | Pest |
| HungaroCAD Informatikai Kft. | Budapest |
| Hungarocom Telecommunication Kft. | Budapest |
| HungaroTrial | |
| HW Stúdió Kft. | Bács-Kiskun |
| i-Cell Mobilsoft Zrt. | |
| IBCS Hungary Kft. | Budapest |
| Idea Design 2006 Bt. | Vas |
| IdomSoft Zrt. | |
| Igor Corner Internet | Vas |
| iMind | Budapest |
| InCash Ügyvitel Zrt. | Budapest |
| Inclust Systems Kft. | Budapest |
| Indivizo Zrt. | |
| Infinety Group | |
| Infoartnet Kft. | Győr-Moson-Sopron |
| Informatikai Intézet, TTIK, Szegedi Tudományegyetem | |
| Infornax Information Technology Zrt. | Veszprém |
| Infotéka Software | Budapest |
| InnoByte | |
| Innomatrix | Budapest |
| Innonic Group | |
| InnVoice Ügyviteli Szoftver Kft. | Budapest |
| Input Program | Budapest |
| Instalent | |
| Integrity Kft. | Budapest |
| InteliArt | |
| IntelliFactory Kft. | Budapest |
| Intellio Integrated Video System Ltd | |
| Intelliport | |
| Intellisys Kft. | Pest |
| Intellitext | |
| Inter-Computer-Informatika Zrt. | |
| INTER.HU Kft. | Pest |
| Interholding.hu Kft. | Jász-Nagykun-Szolnok |
| InterJNet | Budapest |
| International Investment Bank | Budapest |
| Internet Biztonság EV.-RŐL | Győr-Moson-Sopron |
| Internet Dunaújváros Kft. | Fejér |
| Internet4U | Budapest |
| Intersoft Hungary Kft. | |
| Interword | |
| Intren Kft. | Budapest |
| Intretech Hungary Ltd | |
| Intrex-Hosting Kft. | Budapest |