US EP Companies
- Accion
- Aerojet Rocketdyne
- Astra
- Busek
- CU Aerospace
- Earth Observant
- Exotrail
- Kuiper
- Orbion
- Miles Spaces
- Morpheus
- Northrop Grumman
- Phase Four
- Space Electric Thruster Systems
- SpaceX
International EP Companies
- IHI – Japan: https://www.ihi.co.jp/ia/en/products/space/satprop/index.html#section-ept
- ThrustMe - France: https://www.thrustme.fr/
- Bellatrix Aerospace – India: https://bellatrix.aero/
- Rafael – Israel: https://www.rafael.co.il/worlds/air-and-space/space/
- New Orbit: https://www.neworbit.space/
- Enpulsion – Austria: https://www.enpulsion.com/
- Arian Group – Germany: https://www.ariane.group/en/equipment-and-services/solutions-for-spacecraft/
- Safran Group – France: https://www.ariane.group/en/equipment-and-services/solutions-for-spacecraft/
- Exotrail: https://www.exotrail.com/
- Fakel - Russia
- TsNIIMash - Russia