| Project Web S.A.R.L. | Alpes-Maritimes |
| Projetnet | Nord |
| Projexion | Nord |
| Proksys | Indre-et-Loire |
| Prolexia | Var |
| ProLexis | Alpes-Maritimes |
| Prolival | Hauts-de-Seine |
| Prologin | Val-de-Marne |
| Prologiq | Métropole de Lyon |
| Prologue | Hauts-de-Seine |
| Promatec SSII/ESN | Nord |
| Promise Proteomics | |
| Promosoft | Eure-et-Loir |
| PromoTool | Yvelines |
| Promus | |
| Pronesys | Hauts-de-Seine |
| Pronosoft | Val-de-Marne |
| ProoXi | Yvelines |
| Prophesee | |
| ProPhyl Informatique | Nord |
| Propixo | Paris |
| Proptech Capital | |
| Propulse by CA | |
| ProRealTime | Hauts-de-Seine |
| Proselis | Loire-Atlantique |
| ProSim | Haute-Garonne |
| Prospactive | Côte-d'Or |
| Prospectin | |
| Prosum | Val-de-Marne |
| Prosygma | Haut-Rhin |
| Prosys | Hauts-de-Seine |
| Prosyst | Nord |
| PROTECHNOLOGIES Systems S.A.R.L. | Haute-Savoie |
| Protecmail | Tarn |
| Protego | Hauts-de-Seine |
| ProteoGenix | |
| Protera | |
| ProTubeVR | |
| Provar | |
| Provectio | |
| Provence Business Angels | Bouches-du-Rhône |
| Provence Linux Users Group | Bouches-du-Rhône |
| Provence PC | Var |
| Provence Télécom | Vaucluse |
| Provepharm Life Solutions | |
| Provitec | |
| ProwebCE | Hauts-de-Seine |
| Proxadis | Isère |
| Proxiad | Paris |
| Proxiel | Hérault |