The CFM International LEAP (formerly called LEAP-X) is a high-bypass turbofan engine. It is currently under development by CFM International, a 50-50 joint venture company between GE Aviation of the United States and Snecma of France. It is a modernized replacement for the successful CFM International CFM56, intended to compete with the Pratt & Whitney PW1000G in the single-aisle jetliner market.