| Biopix-T | Crete |
| Biznet Infoservices Ltd | Attica |
| Blastup | |
| BLB.gr | Attica |
| Blue Growth | |
| BlueByte Software | Attica |
| BNS Pro | |
| Brain IsurTech | Attica |
| BrainSoft | Attica |
| BratNet Software | Attica |
| Braunik Ltd | |
| Breakdesigns | Central Macedonia |
| Bridge-it | |
| British Hellenic College | |
| Broker Systems S.A. | |
| Business Angels Greece | |
| Business Cloud | |
| Business Effect Α.Ε. | |
| Byte Computer ABEE | Attica |
| Carge | |
| Census S.A. | Attica |
| Centre for Renewable Energy Sources and Saving | |
| CeoworldMagazine | Attica |
| cforce | Attica |
| CGSoft | |
| Check-Domains.com | North Aegean |
| Chilloutapps | Attica |
| CITY College, University of York Europe Campus | |
| Citycom | Attica |
| Cloudhaz | Epirus |
| CloudSystems | |
| CMD Digital Agency | Attica |
| Code.Hub | Attica |
| Code.Hub | |
| CodeBlocks | Attica |
| Collectives S.A. | |
| College Year in Athens | |
| Compucon S.A. | Central Macedonia |
| Computer Control Systems S.A. | Attica |
| Computer Life | Attica |
| Computer Life S.A. | Attica |
| Computer Technology Institute & Press | Attica |
| ComputerMind S.A. | Attica |
| Comsys | Attica |
| Concel Systems | Attica |
| Connexion3 | Attica |
| Contact Solutions Ltd | Attica |
| ContactPigeon | Attica |
| Corallia | |
| CoreConcepts | |