| Inksystem | Moscow |
| Inline Telecom Solutions | Moscow |
| Inoventica Services | Moscow |
| Inreco LAN | |
| InsideSoft Co. | Moscow |
| Insight IT | |
| INSSMART | |
| Institue of Computational Technologies | Novosibirsk |
| Institute of Automation and Electrometry | Novosibirsk |
| Institute of Computer Science | Udmurt |
| Institute of the Information Society | Moscow |
| Integrosoft | Moscow |
| Intelcom-Connect | Moscow |
| Intella | |
| Intelligent Converters Ltd | Moscow |
| Intelligent Social System | Moscow |
| Intersoft Eurasia | |
| Intersputnik | |
| Intrum CRM | Moscow |
| Inttechno | |
| InvoiceCafé | |
| iPavlov | |
| IPboom | Sverdlovsk |
| iRidium Ltd | Sverdlovsk |
| Irisoft | Moscow |
| Irkutsk National Research Technical University | Irkutsk |
| Irkutsk State University | Irkutsk |
| iSEO | |
| iSimpleLab | |
| iSpring | |
| ISPserver | Irkutsk |
| ISPsystem | |
| IT Crimea | Sevastopol |
| IT Park Kazan | Tatarstan |
| IT Universe | Samara |
| IT-GRAD | Moscow |
| IT-Доминанта | |
| IT-кластер Орел | |
| ITA Labs | |
| ITC-Electronics | Novosibirsk |
| Itima.ru | |
| iTMan | |
| ITPS | Moscow |
| ITShop | Moscow |
| ITSoft | Moscow |
| IVA Technologies | |
| Ivanovo State University of Chemistry and Technology | Ivanovo |
| IW Group | |
| iWebStudio | Saint Petersburg |
| IXBT.com | Moscow |