| Inttechno | |
| InvoiceCafé | |
| iPavlov | |
| IPboom | Sverdlovsk |
| iRidium Ltd | Sverdlovsk |
| Irisoft | Moscow |
| Irkutsk National Research Technical University | Irkutsk |
| Irkutsk Scientific Center of Surgery and Traumatology | |
| Irkutsk State University | Irkutsk |
| iSEO | |
| iSimpleLab | |
| iSpring | |
| ISPserver | Irkutsk |
| ISPsystem | |
| IT Brick | |
| IT Crimea | Sevastopol |
| IT Park Kazan | Tatarstan |
| IT Universe | Samara |
| IT-GRAD | Moscow |
| IT-Доминанта | |
| IT-кластер Орел | |
| ITA Labs | |
| ITC-Electronics | Novosibirsk |
| ItFox | |
| 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 |
| IXcellerate | |
| Izhevsk State Technical University named after M.T. Kalashnikov | |
| J-Phone | |
| JavaScript.info | Moscow |
| JavaScript.ru | |
| Job4j.ru | |
| Joomla! Россия | Moscow |
| Joomla-Code | Moscow |
| Joomla-lesson | Moscow |
| Joomlaportal.ru | Moscow |
| JoomlaTune | Moscow |
| JSC Gazprom Space Systems | Moscow |
| JSC RAMAX International | Moscow |
| JSC «SATIS-TL-94» | |
| JustHost.ru | |
| JustWork | |