| Name | Region |
|---|---|
| Orata | Isère |
| ORAY | Essonne |
| Orbeet | |
| Orbial | |
| Orbitica | Haute-Garonne |
| ORCA Informatique | Paris |
| Orchestra | Paris |
| ORDI 3000 | Hautes-Pyrénées |
| Ordi Clean S.A. | Métropole de Lyon |
| Ordi Plus | Gironde |
| Ordicare | Paris |
| Ordiclef | Aude |
| OrdiDocteur | Paris |
| Ordifun | Hauts-de-Seine |
| Ordilabo | Loire-Atlantique |
| OrdiLem | Eure |
| Ordinal Software | Hauts-de-Seine |
| Ordinatic | Seine-Saint-Denis |
| Ordiplat | Paris |
| OrdiService | Ille-et-Vilaine |
| Ordissimo | Hauts-de-Seine |
| Orditech | Bas-Rhin |
| Ordoclic | |
| Ordolog | Indre-et-Loire |
| Orealys | Haute-Garonne |
| Orega Biotech | |
| Oregon Therapeutics | |
| Orens | |
| Orentis | Paris |
| Oresys | Paris |
| Organicweb | Vaucluse |
| Organisation Systèmes d'Information Conseil | Bouches-du-Rhône |
| Oriade | Alpes-Maritimes |
| Oriale Informatique | Maine-et-Loire |
| Origame | |
| Orinoko | |
| Oriolis | Métropole de Lyon |
| Orisha | Meurthe-et-Moselle |
| Orius | |
| ORKE | |
| Orkester | |
| Orkis Ajaris | Bouches-du-Rhône |
| Orolia | Essonne |
| Orone Data Services | Paris |
| Orphalan S.A. | |
| ORPHELIA Pharma | |
| Orson.io | Paris |
| Orus Energy | |
| Oryanoo | Val-de-Marne |
| Oscar Référencement |