| Alpha Impact | |
| Alto Ventures Program | |
| Altum Technologies Oy | |
| Amaterasu Finance | |
| Analyse2 | Uusimaa |
| Aniway Oy | Uusimaa |
| APE Payment Oy | |
| Aplagon Oy | |
| AppFollow | |
| Applixure Oy | |
| Apprien Oy | |
| Aranda Pharma Ltd | |
| Arcada University of Applied Sciences | |
| Arctic Ax Corporation Oy | |
| Arctic Farming Oy | |
| Arctic Security Ltd | |
| Arctic15 | Uusimaa |
| ArcticStartup Ltd | Uusimaa |
| Arction Ltd | Northern Savonia |
| Ardilla Technologies Ltd | |
| Arguda Oy | North Karelia |
| Arkance Systems | |
| Arkku.net | Pirkanmaa |
| Artific Intelligence Oy | Uusimaa |
| ArtSiCon Ky | Ostrobothnia |
| Arvo Mobile Oy | |
| Aspocomp Group plc | Uusimaa |
| Assetti | |
| Asteri Oy | Uusimaa |
| AstronautIT Oy | |
| Atea | |
| ATK-Apu SP-Systems Oy | Southwest Finland |
| Atostek | Pirkanmaa |
| ATV Marketing Oy | |
| Aurora Propulsion Technologies Oy | Uusimaa |
| Aves Netsec | |
| Avidly Suomi | Uusimaa |
| Awake.AI | |
| Awesome Crowd | |
| Axel Health | |
| AXiiO | |
| Axinoss Oy | |
| Balanced Alternative Techniques ry | Uusimaa |
| Balancer | |
| Bankify Oy | Uusimaa |
| Basemark Oy | |
| BaseN Corporation | Uusimaa |
| BeeHealthy | |
| Beneq | |
| Bero Innovations | |