| Algoretico S.r.l. | |
| Alia Therapeutics | Milan |
| Alias S.r.l. | Friuli-Venezia Giulia |
| Aliasnet S.p.A. | Mantua |
| Alicubi S.r.l. | Turin |
| Alien Technology Transfer | Rome |
| Aliware S.a.s. | Turin |
| Alkeria S.r.l. | Pisa |
| All About Apple | Savona |
| Allnet.Italia S.p.A. | |
| Almaviva S.p.A. | |
| Alohamoku | Pisa |
| Alosys Communications | Rome |
| Alpeh ISP | Genoa |
| ALPHA Consult | Milan |
| Alpitel S.p.A. | Cuneo |
| Alps Blockchain S.p.A. | |
| Alps World S.r.l. | Milan |
| Alt Design Web Agency | Venice |
| Altamira S.r.l. | Milan |
| AltaSartoria S.r.l. | Bologna |
| Altea S.p.A. | Milan |
| Alter Solution S.r.l. | Milan |
| Alterna S.r.l. | |
| Alterside | Milan |
| Altheia Science S.r.l. | Milan |
| Altilia S.r.l. | |
| Alto Agency | Sondrio |
| Alto Partners SGR S.p.A. | |
| Altravia | Rome |
| Altura Labs S.r.l. | Rome |
| Alvus S.r.l. | |
| Ama Automazione S.r.l. | Brescia |
| Amber | Milan |
| Ambient7 S.r.l. | Friuli-Venezia Giulia |
| Ambienta | |
| AME Ventures S.r.l. | |
| AMF System | Rome |
| Amigo S.r.l. | Rome |
| Amma Software | Rome |
| AMP S.r.l. | |
| Amped Software | Friuli-Venezia Giulia |
| Ampercom S.r.l. | Monza and Brianza |
| AMV S.r.l. | Friuli-Venezia Giulia |
| Anastasis Società Cooperativa Sociale | Bologna |
| AND EMILI S.r.l. | Reggio Emilia |
| Andrea Pacini | Florence |
| Andrea Pilotti | Teramo |
| Androidiani.com | Rome |
| Andxor | Milan |