Clients
- ANC (Romanian National Regulatory Authority)
- ARCEP (French National Regulatory Authority)
- Australian Competition and Consumer Commission (ACCC)
- BIPT (Belgian National Regulatory Authority)
- bpost
- Bundesverband Internationaler Express- und Kurierdienste e. V. (BIEK),(German Trade Association)
- European Commission, Directorate General Internal Market and Services
European Commission, Directorate General for Competition
Federal Minister of Economics and Technology (BMWi)
Federal Network Agency for Electricity, Gas, Telecommunication, Post and Railway (German national regulatroy authority)
- Federation of German Consumer Associations (vzbv)
- Malta Communications Authority (MCA)
- Ministry of Economic Affairs, Agriculture and Innovation (EL&I), Netherlands
- Pitney Bowes Inc.
- Postcomm (British National Regulatory Authority)
- PostReg (Swiss National Regulatory Authority)
- primeMail
- RTR (Austrian National Regulatory Authority)
- TAB (Office of Technology Assessment at the German Bundestag)
- Telecommunications Regulatory Commission (TRC), Jordan
- TNT Post UK
- Swiss Department of Environment, Transport, Energy and Communications (DETEC)
- US Postal Regulatory Commission
- US Postal Service, Office of the Inspector General
- World Bank
