| Akun | Madrid |
| alaba a.i. | Madrid |
| Aladetres | Barcelona |
| Alan Communications, S.A. | Barcelona |
| Alanit | Alicante |
| Alantis Seed Capital, S.L. | Madrid |
| Alared Soluciones Web, S.L. | Santa Cruz de Tenerife |
| Alaros | Barcelona |
| Albada informática | Zaragoza |
| Albert Coronado | Girona |
| Alberto Varela | Biscay |
| Alcad Electronics | Barcelona |
| ALD Sistemas, S.A. | Madrid |
| Aldea Ventures | Barcelona |
| Aldebarán Tecnologias de la Informacion, S.L. | Madrid |
| Aldor Internet S.L.L. | Navarre |
| Alea Business Software, S.L. | Barcelona |
| Alecop | Gipuzkoa |
| Alejandro casas | Málaga |
| Alén Space | Pontevedra |
| Aleph Software, S.A. | Madrid |
| Alerce | Zaragoza |
| Alerion Technologies, S.L. | Gipuzkoa |
| Alfa9 | Madrid |
| Alfacamp Startups, S.L. | Sevilla |
| Alfred Smart | Barcelona |
| Algenex | Madrid |
| Alia Multimedia | Granada |
| Alias Robotics, S.L. | Álava |
| Alice Biometrics, S.L. | Pontevedra |
| Alien Ventures | Madrid |
| Aliquo Software | Madrid |
| Alisys | Madrid |
| Allbit Solutions | Madrid |
| Allcom | Barcelona |
| Allenta Consulting | A Coruña |
| Allfunds Bank, S.A.U. | |
| Allinky Biopharma, S.L. | Madrid |
| AllRead Machine Learning Technologies, S.L. | Barcelona |
| Almirall, S.A. | Barcelona |
| Alojared | Madrid |
| Alpha Unmanned Systems, S.L. | Madrid |
| AlphaSIP | Zaragoza |
| Alta en buscaderos | Las Palmas |
| ALTAI Soft, S.L. | Madrid |
| Altamira Online, S.L. | Pontevedra |
| Altan Pharmaceuticals, S.A. | Madrid |
| Alter Technology Tuv Nord, S.A. | Sevilla |
| Alter Technology Tüv Nord, S.A.U. | |
| Alterego Web Services, S.L. | Girona |