| Name | Region |
|---|---|
| Claned Group Oy Ab | |
| Client Studios Oy | Uusimaa |
| Clinical Research Services Turku | |
| Cloubi | |
| Cloud City Oy | |
| Cloud'N'Sci Ltd | |
| Cloud2 Oy | |
| CloudCenter | Uusimaa |
| Cloudia Ltd | |
| CodeBasics | |
| Codeman Software | Uusimaa |
| Codemate | |
| Codemen Oy | |
| Codento Oy | Uusimaa |
| Codepng | |
| Codership Oy | Uusimaa |
| Coinmotion Oy | |
| CollectiveCrunch | |
| Com-Soft | Ostrobothnia |
| Commercetech Scandinavia Ltd | Southwest Finland |
| Comparables.ai | |
| Comptek Solutions Oy | |
| Connected Finland Oy | |
| Connexor Oy | Uusimaa |
| Conor Venture Partners | Uusimaa |
| Contractzen | |
| Convion Ltd | |
| Core Service Oy | |
| Cozify Oy | |
| Critical Force | |
| CSC | Uusimaa |
| CSC - Tieteen Tietotekniikan Keskus Oy | |
| CubiCasa | |
| D-Fence Oy | Uusimaa |
| Data Group | Uusimaa |
| Data Prisma | |
| Data-Enter Oy | |
| Data-Systems | Uusimaa |
| DataCrunch.io | |
| Datafisher | |
| DataPartner Oy | |
| Datatronic | Päijänne Tavastia |
| Daysave Ltd | |
| Dazzle | |
| Dazzle Rocks | |
| Dealsign Solutions Oy | |
| DeFi | |
| Delfoi Oy | |
| Delicode Ltd | |
| DelSiTech Ltd |