| Bouge, S.A. | Madrid |
| Box2box, S.L. | Madrid |
| Boxfish Studio, S.L. | Madrid |
| Boxfish Studio, S.L. | |
| BPM&SOA Solutions | Madrid |
| Brain Hardware, S.L. | Madrid |
| Brande Comunicación | |
| Bravent | Madrid |
| Bredax | Barcelona |
| Brickbro | |
| Brickken PFP, S.L. | Barcelona |
| Brielco Componentes y Artículos Electrónicos | Jaén |
| Brill Pharma | |
| Briseida | |
| Broomx Technologies | |
| Brother Iberia, S.L.U. | Madrid |
| Bryte | Barcelona |
| BSM Informática, S.L. | Gipuzkoa |
| BSN Software & Consulting | |
| BTESA Broad Telecom S.A. | Madrid |
| BTODigital | Málaga |
| Buckle Marketing Online | |
| Bulegoak Soluciones Tecnológicas | Gipuzkoa |
| Bullhost | Biscay |
| Bullnet Capital | |
| Business Factory Auto | Pontevedra |
| Business Insights | |
| butic | Madrid |
| butic The New School | |
| Butler Scientifics, S.L. | |
| BWatr | |
| Byom! | |
| Bytemaster | Barcelona |
| BytePC | Madrid |
| C.B.D. S.A. Dirac | Valencia |
| C3S Business School | |
| Cabe Keep & Lock, S.A. | |
| Cabify | Madrid |
| Cableados Jecri, S.L. | Barcelona |
| Cablecom | Barcelona |
| CableData Telecom | Málaga |
| Cablematic Dos Mil, S.L.U. | Barcelona |
| Cables de Comunicaciones Zaragoza, S.L. | Zaragoza |
| Cables RCT | Zaragoza |
| Cables y Eslingas, S.L.U. | Barcelona |
| Cabletronic | Barcelona |
| Cadtec Services, S.A. | Madrid |
| Cadtech Ibérica, S.A. | Barcelona |
| Cadvision, S.L. | Biscay |
| CAEsoft | Madrid |