| Name | Type | Country |
|---|---|---|
| Birmingham Coty Council | Public administration | United Kingdom |
| Bizgorre | Enterprise | Spain |
| Bizintek Innova | Enterprise | Spain |
| Bosonit Sl | Enterprise | |
| Bright Development Studio | Enterprise | |
| Bristol city council | Enterprise | United Kingdom |
| Building Facility Services Parohi Ipiresion Anonimi Eteria | Enterprise | |
| Cambridge Cleantech | Enterprise | United Kingdom |
| Camera-contact | Enterprise | Spain |
| Campania Region | Public administration | Italy |