| ECKware GmbH | |
| ECLASS e.V. | |
| EclEmma | Bavaria |
| EclipseSource | Baden-Württemberg |
| eclore // Internetagency | North Rhine-Westphalia |
| eco - Verband der Internetwirtschaft e.V. | |
| ECO//SUN GmbH | Bavaria |
| ecocode GmbH | |
| Ecodynamics GmbH | |
| EcofinConcept GmbH | North Rhine-Westphalia |
| EcoG GmbH | |
| ecoLocked GmbH | |
| Ecolytiq GmbH | |
| ECOM Electronic Components Trading GmbH | Bavaria |
| ecom instruments GmbH | Baden-Württemberg |
| eCom webservices Tolkmitt & Sablotzki GbR | Bremen |
| eCom-Nord | Mecklenburg-Vorpommern |
| eCommerce Werkstatt GmbH | North Rhine-Westphalia |
| Ecomplan GmbH | |
| Ecomply GmbH | Bavaria |
| EComradeGroup Andreas Hartmann-Schneevoigt und Christian Werner GbR | Thuringia |
| ECON Application GmbH | |
| Econ Consulting GmbH | North Rhine-Westphalia |
| econ solutions GmbH | |
| Econa AG | |
| Econap | |
| Econsor GmbH | Baden-Württemberg |
| EconStor | |
| Econsult Umwelt Energie Bildung GbR | Baden-Württemberg |
| ecoObs GmbH | Bavaria |
| ECOPLAN Holding GmbH | North Rhine-Westphalia |
| EcoPlanet Green Operations GmbH | |
| Ecos Office-Center GmbH & Co. KG | |
| Ecosia GmbH | |
| Ecosoft Sachsen GmbH | Saxony |
| Ecosummit | |
| Ecotel Communication AG | North Rhine-Westphalia |
| ECount GmbH | Bavaria |
| Ecovis Webservice GmbH | |
| ecovium GmbH | Baden-Württemberg |
| ecovium Holding GmbH | |
| Ecoworks GmbH | |
| eCozy | Bavaria |
| eCozy GmbH | Bavaria |
| Ecozy GmbH | |
| ECT Service GmbH | Lower Saxony |
| edataconsulting Gmbh | |
| EDB Datenbankgesellschaft Hanel mbH | Saxony |
| EDB-Electronic GmbH | Baden-Württemberg |
| Eddi24 GmbH | Hesse |