| Workmate | Singapore |
| World Scientific Publishing Co Pte Ltd | |
| WorldLink Technologies (S) Pte Ltd | Singapore |
| WPH Digital Pte Ltd | Singapore |
| WriterZen | |
| X-ZELL Biotech Pte Ltd | |
| X0PA AI | Singapore |
| Xantec Solutions | Singapore |
| Xantec Solutions Singapore | |
| XBap.org | Singapore |
| Xcourse Pte Ltd | Singapore |
| Xen Technologies Pte Ltd | Singapore |
| XID Technologies Pte Ltd | Singapore |
| Xircus Pte Ltd | Singapore |
| Xirlynx Innovations | Singapore |
| Xnergy Autonomous Power Technologies | Singapore |
| Xora Innovation Pte Ltd | Singapore |
| Xord | |
| XSEED Education Pte Ltd | Singapore |
| Xsosys Technology (Singapore) Pte Ltd | Singapore |
| xSquare Pte Ltd | Singapore |
| Xssist Group Pte Ltd | Singapore |
| Xtremax Pte Ltd | Singapore |
| XYSoft Pte Ltd | Singapore |
| XYZ Lab Pte Ltd | |
| Y5ZONE Singapore Pte Ltd | Singapore |
| Yale-NUS College | Singapore |
| Yang Zhang Lab | |
| Yaskawa Asia Pacific Pte Ltd | |
| Yeeflow | Singapore |
| Yellow Pages Pte Ltd | Singapore |
| YellowCube Pte Ltd | Singapore |
| Yellows Digital | Singapore |
| YFind Technologies | Singapore |
| YI Solutions | Singapore |
| YOOSE Pte Ltd | Singapore |
| Yottaasys | Singapore |
| You Technologies Group Ltd | Singapore |
| Yoursite.sg | Singapore |
| Yugene Lee | Singapore |
| Yuma AI | Singapore |
| ZA Tech | Singapore |
| Zaapi | Singapore |
| Zap Asia Pte Ltd | Singapore |
| Zeabur Pte Ltd | |
| Zeatech Computer Systems Pte Ltd | Singapore |
| Zencode | |
| Zensite | |
| ZiiLABS Pte Ltd | Singapore |
| ZILHive | Singapore |