EDI has a large client base, comprised of various national and international companies, governments and academic institutes, e.g.:
- Accenture
- Alliander
- Atos Origin
- Baker Hughes
- Bayerngas
- Borovsky Institute
- Boston Consulting
- Distrigas
- Dutch Ministry of Economic Affairs
- Dutch Ministry of Foreign Affairs
- Dong Energy
- EBN
- Electrabel
- Energy Development Partners
- E.ON Ruhrgas
- Electrabel
- Eneco Energie
- Essent
- Fluxys
- Foundation JIN (Joint Implementation Network)
- GasTerra
- Gazprom
- GDF Suez
- Group Deloitte
- International Gas Union
- KEMA
- NAM
- N.V. Nederlandse Gasunie
- Nogepa
- Nuon
- Oxxio
- Petrobras
- Petronas
- PGNIG
- RWE
- Saudi Aramco
- Shell
- StatoilHydro
- Stork
- TNK BP
- Wingas
- Wintershall