| Host Institute | Short name | Toolkit |
| University of Freiburg (Germany) | ALU-FR | |
| University of Lund (Sweden) | LUND | |
| The Institute of Photonic Sciences (Spain) | ICFO | |
| Commissariat à l’énergie atomique et aux énergies alternatives (France) | CEA | |
| Unversidad Autonoma de Madrid (Spain) | UAM | |
| Amplitude (France) | AMPL | |
| The Foundation for Research and Technology – Hellas (Greece) | FORTH | |
| Sphere Ultrafast Photonics (Portugal) | SPH | |
| Max Born Institute Berlin (Germany) | FVB-MBI | |
| Elettra SincrotroneTrieste – FERMI (Italy) | FERMI |