| Algo Data | Loire-Atlantique |
| Algogems | |
| Algolia SAS | Paris |
| Algoreg Tech S.A.S. | |
| Algorel | |
| Algorithmique | Aisne |
| AlgoTx | |
| Algo’Tech | Pyrénées-Atlantiques |
| Alias Informatique | Pyrénées-Orientales |
| AliaSys | Hauts-de-Seine |
| Alicante | Nord |
| Alice & Bob | |
| Alineos | Seine-et-Marne |
| Alinto | Métropole de Lyon |
| Alis Informatique | Paris |
| Aliscom | Paris |
| Aliston | |
| Alixio | |
| Alizey Technology | Seine-Saint-Denis |
| Alkalee | |
| Alkemics SAS | Paris |
| Alkeo | |
| All Eat One | |
| All Skies Studio | Pyrénées-Orientales |
| All Ways | |
| All-in-web | Yvelines |
| All4Tec | Essonne |
| Allance Informatique | Val-de-Marne |
| Allaw | |
| Allen | Bas-Rhin |
| AllForWeb | |
| Alliance Consulting | Gironde |
| Alliance for Impact | |
| Alliance Informatique | Bas-Rhin |
| Alliance Innovation Santé Nouvelle-Aquitaine | |
| Alliance Libre | Loire-Atlantique |
| Alliance Métiers et Technologies | Alpes-Maritimes |
| Alliance Réseaux | Savoie |
| Alliance Telecom | Paris |
| Alliance.net Informatique | Vienne |
| Alliancy | |
| Alliantech | |
| Alliantic | Val-de-Marne |
| Alliantz | Aude |
| Alliastore | Ille-et-Vilaine |
| Alliasys | Ille-et-Vilaine |
| Allistene | Yvelines |
| allMaint | Corrèze |
| Allmatrix | Isère |
| Allmysms | Alpes-Maritimes |