| 0PHP.com | North Karelia |
| 10tons Ltd | Pirkanmaa |
| 2M-IT Oy | |
| 3 Step IT Group Oy | Uusimaa |
| 3A Consulting Oy | |
| 3DTech Oy | |
| 3rd Eye Studios | |
| 3TS Capital Ventures | Uusimaa |
| 6G Flagship | North Ostrobothnia |
| A Grid | |
| A-Lab Oy | |
| Aalto Startup Center | |
| Aalto University - Department of Computer Science | Uusimaa |
| Aalto University - Department of Mathematics and Systems Analysis | Uusimaa |
| Aalto University Startup Center | Uusimaa |
| Aalto-yliopisto | Uusimaa |
| Aalto-yliopiston teknillinen korkeakoulu - Matematiikka | Uusimaa |
| Aalto-yliopiston teknillinen korkeakoulu - Ohjelmistotekniikan laboratorio | Uusimaa |
| Aaltoes | Uusimaa |
| Aamu.app | |
| Aastra Finland Oy | Uusimaa |
| Aatos Legal Technology | |
| Aava Mobile Oy | |
| Åbo Akademi | Southwest Finland |
| Accelerando Oy | |
| Accelerando Oy | |
| Adcount Oy | |
| Addcomposites Oy | |
| AddSearch Oy | Uusimaa |
| Adeona Oy | |
| Admescope | |
| Admescope Ltd | |
| Adsotech Scandinavia Oy | Uusimaa |
| Aerial Oy | Uusimaa |
| Ahjo Communications Oy | |
| Aibidia | |
| Aico Group Oy | |
| Aiforsite | |
| Aion Sigma, Inc. | |
| Aispect | |
| Aito Intelligence Oy | Uusimaa |
| Aiven Oy | Uusimaa |
| Aivosto Oy | Uusimaa |
| Aiwo Digital Oy | |
| Akkurate Oy | |
| Ålands Telekommunikation Ab | Åland Islands |
| Ålandsbanken | Uusimaa |
| Algol Technics | |
| Algorithmiq | |
| Allteq Solutions Oy | |