Engie Australia (stylised as ENGIE), previously Simply Energy, is an Australian energy retailer, providing electricity and gas to more than 700,000 accounts across Victoria, South Australia, New South Wales, Queensland and Western Australia, with sales totalling 12% of the Australian market.

In 2005, the EA-IPR Retail Partnership was launched as a retail brand by International Power in a partnership with New South Wales state-owned enterprise EnergyAustralia, and the partnership operated in the electricity and gas retail and wholesale markets of Victoria and South Australia.

[4][3][5] Subsequently, International Power launched the retail brand as Simply Energy in those two states.

Between 2010 and 2012, International Power was progressively acquired by French company GDF Suez, with the French Government having control of the entity and its subsidiaries, including Simply Energy.

[2] Simply Energy had been subject to many high profile complaints regarding the practices of their doorknockers and billing issues.