BEST is a non-profit organisation, based in The Netherlands, with members from:
- International transport organisations, which represent the different modes of transport and their interests.
- Associations, organisations and individual companies in the European transport sector.
- Organisations of shippers and other directly involved representatives of parties dealing with transport.
- Governments or semi-governmental organisations directly dealing with transport information.
- International EDI-organisations at which an important part of the transport sector is represented.

BEST is financed by yearly contributions from its members.