| Name | Region |
|---|---|
| Builderhead | |
| Bumblebee Design Oy | |
| Business Finland | |
| Business Jyväskylä | |
| Business Turku | |
| Buttercup | Uusimaa |
| Butterfly | North Ostrobothnia |
| C Finance Oy | |
| Cactos | |
| Cadmandata Oy | Pirkanmaa |
| Cadmatic | Southwest Finland |
| Caidio | |
| Cambri | |
| Canatu Oy | |
| Canon Oy | Uusimaa |
| Carbo Culture | |
| Carbonaide Oy | |
| Cardiolyse | |
| Casambi Technologies | |
| Casambi Technologies Oy | |
| Causalytics | |
| Centria-ammattikorkeakoulu | |
| Cerenion Oy | |
| CH-Bioforce Oy | |
| CHAOS Architects Oy | |
| Chipmetrics | |
| Cinia Oy | North Ostrobothnia |
| Circles Consulting Oy | |
| City Dev Labs | |
| Claned Group Oy Ab | |
| Client Studios Oy | Uusimaa |
| Clinical Research Services Turku | |
| Cloubi | |
| Cloud 9 SEO | |
| Cloud City Oy | |
| Cloud'N'Sci Ltd | |
| Cloud2 Oy | |
| CloudCenter | Uusimaa |
| Cloudia Ltd | |
| CodeBasics | |
| Codeman Software | Uusimaa |
| Codemate Oy | |
| Codemen Oy | |
| Codento Oy | Uusimaa |
| Codepng | |
| Codership Oy | Uusimaa |
| CollectiveCrunch | |
| Com-Soft | Ostrobothnia |
| Comgate Oy | |
| Commercetech Scandinavia Ltd | Southwest Finland |