| Health & Life Sciences Cluster Bulgaria | Sofia |
| Heat Digital | |
| Helpdesk Bulgaria | Sofia |
| HermesSOFT | Sofia |
| HiComm | Sofia |
| Hire Heroes | |
| Home-Cinema.bg | Sofia |
| HoneyBytes | |
| Hop Online Ltd | Sofia |
| hop.bg | Sofia |
| Horizons Bulgaria | Sofia |
| Host Bulgaria | Sofia |
| Host.ag | Sofia |
| Host.bg | Sofia |
| HP-shop.bg | Sofia |
| HRS Bulgaria | Sofia |
| Humans in the Loop | Sofia |
| I Rise mechanics 357 JSC | Sofia |
| I-Creativ Studio | Plovdiv |
| IBS Bulgaria Ltd | Sofia |
| Icanpreneur | |
| iCard | Varna |
| ICDSoft | Sofia |
| ICT Cluster | Sofia |
| ICT Cluster Burgas | Burgas |
| ICT Development Bulgaria | |
| Icygen | Sofia |
| Identa | Sofia |
| IGK Electronics | Varna |
| Imagga | Sofia |
| Imperia Online | |
| Imperia Online JSC | Sofia |
| Impetus Capital | Sofia |
| In-house Team | |
| INBG Hosting | Sofia |
| Inbound.bg | Varna |
| Index-Bulgaria Ltd | Sofia |
| IndigoVerge | Sofia |
| Indiveon Nearshore Outsourcing EOOD | |
| Infinite X Labs Ltd | Sofia |
| InfoBox Co. | Sofia |
| Infoleven Ltd | |
| Informa Computers | Sofia |
| InfoServ CRM | Sofia |
| Init Lab | Sofia |
| Innova Consult | Sofia |
| Innovation Capital AD | Sofia |
| Innovation Explorer | Sofia |
| Innovation Starter Accelerator | Sofia |
| Innovations in Software Technologies and Automation | Sofia |