OPNsense1. Deciso B.V.
2. iXsystems, Inc.
3. EuroBSDCon
4. Netgate
5. Claranet
6. Voleatech
7. Open Systems AG
8. Securebit AG
9. Proxmox Server Solutions GmbH
10. AVM Computersysteme Vertriebs GmbH
Additional customers include: T-Systems International GmbH, Deutsche Telekom AG, Vodafone GmbH, 1&1 IONOS SE, OVHcloud, Hetzner Online GmbH, Strato AG, PlusServer GmbH, Host Europe GmbH, United Internet AG, 1&1 Versatel Deutschland GmbH, QSC AG, Bechtle AG, Cancom SE, Computacenter AG & Co. oHG, T-Systems Multimedia Solutions GmbH, Atos SE, Capgemini SE, Accenture plc, IBM Corporation, Hewlett Packard Enterprise Company, Cisco Systems, Inc.