| Hashmeta Pte Ltd | Singapore |
| Hatcher | Singapore |
| HaxAsia Pte Ltd | Singapore |
| HealthXCapital | Singapore |
| Helicap | |
| Hex | Singapore |
| Hexon Technology Pte Ltd | Singapore |
| HeyAI | Singapore |
| HI-EX IT Services Pte Ltd | Singapore |
| Hi-Feed Automation Pte Ltd | Singapore |
| Hi-Tech Smart Solutions Pte Ltd | Singapore |
| Hidoc Pte Ltd | Singapore |
| High Velocity Solutions | Singapore |
| High-Tech Solutions | |
| Hilife Interactive Pte Ltd | Singapore |
| Hillhouse Investment | |
| Hipster | |
| Hipster Inc | |
| HireQuotient | |
| Hisaka Holdings Ltd | Singapore |
| Hitachi High-Technologies (Singapore) Pte Ltd | Singapore |
| HitPay Payment Solutions Pte Ltd | Singapore |
| Hoiio Pte Ltd | Singapore |
| HollySys Group | |
| Holmusk | Singapore |
| HolyWally | |
| HOOPSTUDIO Technologies | Singapore |
| Horangi Cyber Security | Singapore |
| Horizon Quantum Computing Pte Ltd | Singapore |
| HostSG | Singapore |
| Hot-Dock Imaginary | Singapore |
| Hotelogix | |
| Hoya Surgical Optics | |
| HP PPS Singapore (Sales) Pte Ltd | Singapore |
| HReasily | Singapore |
| HRMWAGE | |
| HRnetOne | Singapore |
| HSBC Singapore | Singapore |
| hSenid Mobile Solutions | |
| Hub Solutions One Pte Ltd | |
| Hubble | Singapore |
| Hugosave | Singapore |
| HumanAI | |
| HyalRoute | Singapore |
| Hybrionic Pte Ltd | Singapore |
| Hyper Group | Singapore |
| Hyper Resources | Singapore |
| Hypercube Consulting Pte Ltd | Singapore |
| Hyperganic Pte Ltd | Singapore |
| Hyperspin Pte Ltd | Singapore |