| Paymefy | Barcelona |
| PayRetailers | Barcelona |
| PayThunder | Barcelona |
| PC a medida | Pontevedra |
| PC Componentes y Multimedia, S.L.U. | Murcia |
| PC Factory Computer, S.L.U. | Madrid |
| PC Imagine, S.C.P. | Barcelona |
| PC Rednet, S.L. | Madrid |
| PCTECH Assistance | Madrid |
| Pctech Informática | Málaga |
| Peñalara Software | Segovia |
| Peninsula | Barcelona |
| Penpot | Madrid |
| Pentasoft | Madrid |
| Pentínfor Tiendas, S.L. | Sevilla |
| Peoople | Madrid |
| Peoplecall VoIP Provider | Madrid |
| Pepcomsystem, S.L.U. | Madrid |
| Pepe Tomé | Barcelona |
| Peptomyc | Barcelona |
| Perito informático | Madrid |
| Perixx | Madrid |
| Personal Computer Expansion, S.L.U. | Sevilla |
| Pes Systems | Madrid |
| Peslam Estudios, S.L. | Madrid |
| PFS Grupo | Asturias |
| PH Systems, S.L. | Girona |
| PharmaMar | Madrid |
| Pharus.biz | Valencia |
| Phoenix Technologies Spain CES, S.L. | Granada |
| Phone House Spain, S.L. | Madrid |
| photonicSENS | Valencia |
| PHPNuke | Madrid |
| PIBANK | Madrid |
| Pibisi | Madrid |
| Piccolo Studio | |
| Pickaweb | Málaga |
| Piensaenweb | Zaragoza |
| Piher Sensors & Controls, S.A. | Navarre |
| Píldoras Informáticas | Málaga |
| Pinatar Computer | Murcia |
| Piot Technology | Madrid |
| Pipeline Software | Castellón |
| Pipoca | Barcelona |
| Pisa Electrónica, S.L. | Sevilla |
| Pixel Farm | Madrid |
| Pixelware | Madrid |
| PKF Attest | Biscay |
| Planatec | Castellón |
| Planealia | Toledo |