The user base of DD4hep consists of the following experiments/collaborations
Using in production
The following collaboration and projects are using DD4hep as part of their production software chain
CEPC Collaboration
CLICdp Collaboration
CMS Collaboration
FCC - Future Circular Collider Study
ILD Collaboration
LHCb Collaboration
Super Tau Charm Factory in China
SiD Collaboration
Under investigation
The following collaboration are evaluting DD4hep for usage in future software upgrades.