| Achates360 Pte Ltd | Singapore |
| Achievement | Singapore |
| ACM Biolabs Pte Ltd | Singapore |
| ACME.BOT | |
| Acmex | Singapore |
| ACRE Design Pte Ltd | Singapore |
| Activamedia | Singapore |
| Activate Interactive Pte Ltd | Singapore |
| Active 8 Pte Ltd | Singapore |
| Active Venture | Singapore |
| Active.Ai | Singapore |
| actyv.ai | Singapore |
| AcuLearn Online | Singapore |
| AD Guys & Co | |
| Ad-Fusion | Singapore |
| Additive Circuits Pte Ltd | Singapore |
| Addvalue Technologies Ltd | Singapore |
| ADDX | Singapore |
| Adelis Associates | Singapore |
| Adelmo Singapore Pte Ltd | Singapore |
| AdFlex | Singapore |
| ADI | Singapore |
| Adilam Pte Ltd | Singapore |
| Adireto Pte Ltd | |
| Adroit Data Recovery Centre Pte Ltd | Singapore |
| Adroit Millennium Pte Ltd | Singapore |
| Adssential Marketing | |
| Advance Interactive Technologies Pte Ltd | Singapore |
| Advance.AI | Singapore |
| Advancedata Network | Singapore |
| AdVantage SEO | Singapore |
| Advocado | Singapore |
| Adweb Design Private Limited | Singapore |
| Aegir | |
| Aelf | Singapore |
| AEM | Singapore |
| AEternus Singapore | Singapore |
| Aevice Health Pte Ltd | |
| AFFiNE | Singapore |
| Affle | Singapore |
| Afon Pte Ltd | Singapore |
| Agency for Science, Technology and Researcg | Singapore |
| AgentScale AI | |
| AgileLab | Singapore |
| AGVA Technologies Pte Ltd | Singapore |
| Ahiho | |
| Ahrefs Pfe Ltd | Singapore |
| AI Network Pte Ltd | Singapore |
| AI Singapore | Singapore |
| Aicadium Singapore Pte Ltd | Singapore |