| Name | Region |
|---|---|
| Akkurate Oy | |
| Aktia Pankki Oyj | |
| AL Safety Design Ltd | |
| Ålands Telekommunikation Ab | Åland Islands |
| Alexandria Group Oyj | |
| Algol Technics | |
| Algorithmiq | |
| Allteq Solutions Oy | |
| Alpha Alias Digital Oy | |
| Alpha Bat Pro Oy | |
| Alpha Impact | |
| Alto Ventures Program | |
| Altum Technologies Oy | |
| Amaterasu Finance | |
| AMD Silo AI | |
| Analyse2 | Uusimaa |
| Aniway Oy | Uusimaa |
| APE Payment Oy | |
| Aplagon Oy | |
| AppFollow | |
| Applixure Oy | |
| Apprien Oy | |
| Arado | |
| Aranda Pharma Ltd | |
| Arcada University of Applied Sciences | |
| Arctic Ax Corporation Oy | |
| Arctic Farming Oy | |
| Arctic Instruments | |
| Arctic Security Ltd | |
| Arctic15 | Uusimaa |
| ArcticStartup Ltd | Uusimaa |
| Arction Ltd | Northern Savonia |
| Ardilla Technologies Ltd | |
| Arguda Oy | North Karelia |
| Arkku.net | Pirkanmaa |
| Arter | |
| Artific Intelligence Oy | Uusimaa |
| ArtSiCon Ky | Ostrobothnia |
| Arvo Mobile Oy | |
| Aspocomp Group plc | Uusimaa |
| Assetti | |
| Asteri Oy | Uusimaa |
| AstronautIT Oy | |
| Atelier Digital Oy | |
| Atelier Helsinki | |
| ATK-Apu SP-Systems Oy | Southwest Finland |
| Atostek | Pirkanmaa |
| ATV Marketing Oy | |
| Aurlide | |
| Aurora Propulsion Technologies Oy | Uusimaa |