| RusBusinessInform | Moscow |
| RusNet | Moscow |
| Rusoft | Moscow |
| Russian Apache | Moscow |
| Russian Association of Robotics | Moscow |
| Russian Fedora | Moscow |
| Russian FreeBSD Team | Moscow |
| Russian Gentoo Linux Community | Moscow |
| Russian Internet Week | Moscow |
| Russian Software Developer Network | Moscow |
| Russian Speaking Zope and Python Users Group | Rostov |
| Russian Venture Company | |
| Russian Venture Forum | |
| RUSSOFT | Saint Petersburg |
| Rutech | Moscow |
| Rutube | |
| RuWeb | Moscow |
| Rzhanov Institute of Semiconductor Physics | Novosibirsk |
| SafenSoft | |
| Sailplay | |
| Saint Petersburg State Technological Institute | Saint Petersburg |
| Saint Petersburg State University of Aerospace Instrumentation | Saint Petersburg |
| Saint Petersburg State University Research Park | Saint Petersburg |
| Saint-Petersburg State University - Mathematics and Mechanics Faculty | Saint Petersburg |
| Samara State University of Economics | Samara |
| SAP R/3 форум ABAP консультантов | Moscow |
| Sapr2000 | Moscow |
| SautinSoft | Udmurt |
| SBC Technologies | |
| Sber500 | |
| Sber500 | |
| SberServices | |
| SBS Soft | |
| ScadSoft | Moscow |
| Schoodle | |
| Scorista | |
| Scorocode | |
| Scortech | |
| SDI Solution | |
| Search Engine Marketing Software | Moscow |
| SecuritySoft Co. | Moscow |
| Selectel Ltd | Saint Petersburg |
| Selecty | |
| SEO Web Studio | Voronezh |
| Seo-Matik | |
| SertesLab | Moscow |
| Sesame Software | Moscow |
| Seven Winds Studio | Krasnodar |
| Sevhosting.net | Sevastopol |
| SF Education | |