| Singer Finance (Lanka) plc | Western Province |
| SL BPO | Western Province |
| SLT Digital Services (Pvt) Ltd | Western Province |
| Smashy Design (Pvt) Ltd | Western Province |
| Softcodeit Solutions (Pvt) Ltd | Western Province |
| SoftLogic Holdings Ltd | Western Province |
| South Asian Institute of Technology and Medicine | |
| Sri Lanka Association for Software Services Companies | Western Province |
| Sri Lanka Export Development Board | |
| Sri Lanka Institute of Advanced Technological Education | |
| Sri Lanka Institute of Information Technology | Western Province |
| Sri Lanka Institute of Nanotechnology | Western Province |
| Sri Lanka Online | Western Province |
| Sri Lanka Telecom | Western Province |
| STEMUp Educational Foundation | Western Province |
| Suge Global | Western Province |
| Sumathi Global Consolidated (Pvt) Ltd | Western Province |
| Superwebglow | Western Province |
| SupremeSAT (Pvt) Ltd | Western Province |
| Sysco LABS | Western Province |
| Tally Solutions | Western Province |
| Tech One Global | Western Province |
| TeKnowledge Shared Services (Pvt) Ltd | |
| Telecommunications Regulatory Commission of Sri Lanka | Western Province |
| thinkCube Systems | Western Province |
| Treinetic (Pvt) Ltd | Western Province |
| TrumpCode (Pvt) Ltd | Western Province |
| UB Finance Co., Ltd | Western Province |
| Union Bank of Colombo plc | |
| University of Colombo | |
| University of Kelaniya - Department of Statistics and Computer Science | Western Province |
| University of Moratuwa | |
| University of Moratuwa - Department of Computer Science and Engineering | Western Province |
| University of Moratuwa - Department of Electrical Engineering | Western Province |
| University of Morotuwa - Department of Electronic & Telecommunication Engineering | Western Province |
| University of Morotuwa - Department of Mathematics | Western Province |
| University of Peradeniya - Department of Statistics & Computer Science | Central Province |
| University of Ruhuna - Department of Electrical and Information Engineering | Southern Province |
| University of Sri Jayewardenepura - Department of Statistics and Computer Science | Western Province |
| V Code Technologies | Western Province |
| Vega Innovations | Western Province |
| Venture Engine | Western Province |
| Veracity Group | |
| Vesess Pvt Ltd | Western Province |
| Victory Information | Western Province |
| WaveNET International | Western Province |
| Wayamba University of Sri Lanka | |
| Web Crafts (Pvt) Ltd | Western Province |
| Web Hosting Lanka | Western Province |
| Web Lankan (Pvt) Ltd | |