| Legal Entity | Short Name | Country | ToolKit |
| Politecnico Milano | POLIMI | Italy |  Toolkit |
| Max Born Institute | MBI | Germany | Toolkit |
| University of Lund | LUND | Sweden | Toolkit |
| Deutsches Elektronen Synchrotron | DESY | Germany | Toolkit |
| Max Planck Institute for Quantum Optics Garching | MPQ | Germany | — |
| Aarhus University | AU | Denmark | Toolkit |
| Amplitude Technologies | AMPL | France | Toolkit |
| Commissariat à l’énergie atomique et aux énergies alternatives | CEA | France | Toolkit |
| Foundation for Research and Technology-Hellas | FORTH | Greece | Toolkit |
| Femtolasers | FEMTO | Austria | Toolkit |