| Qeshm Higher Education Institute | |
| Qom University of Medical Sciences. | |
| Qom University of Technology | |
| Quera | Tehran |
| RaasCo | Tehran |
| Rafsanjan University of Medical Sciences | |
| Ragheb Isfahani Institute of Higher Education | |
| Rahbord Shomal University | |
| Rahedanesh Institute of Higher Education | |
| Rahman Institute of Higher Education | |
| Raja University | |
| Rasam University | |
| Ravand Tazeh, Inc. | Tehran |
| Rayaneh | Tehran |
| Rayanehmag.net | Tehran |
| Rayvarz | Tehran |
| Razi University | |
| Research Institute of Food Science and Technology | |
| Research Institute of Hawzah and University | |
| Research Institute of Hawzeh and University | |
| Rezaei Institute of Higher Education | |
| RighTel Communications | Tehran |
| Rouzbahan University | |
| Royal Web | Tehran |
| Royan Institute | |
| Rudaki Institute of Higher Education | |
| Rushdieh Institute of Higher Education | |
| Sabanet | Tehran |
| Sabvezar University of Medical Sciences | |
| Sabz Institute of Higher Education | |
| Sadjad University | |
| Sadra Institute of Higher Education | |
| Safahan Institute of Higher Education | |
| Sahand University of Technology | |
| Sakha Ravesh Co. | Tehran |
| Salman Farsi University of Kazerun | |
| Salman Institute of Higher Education | |
| Samangan Institute of Higher Education | |
| Samasoft | Tehran |
| Samix | Tehran |
| Sana Institute of Higher Education | |
| Sanabad Golbahar Insitute of Higher Education | |
| Sarava | Tehran |
| Sari University of Agricultural Sciences and Natural Resources | |
| Saroyeh Institute of Higher Education | |
| SarvCRM | Tehran |
| SASite.net | Tehran |
| Science and Arts University | |
| Sefr-Yek | Tehran |
| Semnan Science and Technology Park | Semnan |