The deal, which is all stock, is expected to close in 2022. Goldman Sachs sees the deal as a chance for it to boost its entry into consumer finance markets.
The US banking giant will furnish its Marcus banking app with capabilities from the GreenSky platform.
It has already added automated investing and personal finance to Marcus, and inked partnerships with a range of major companies including Amazon and Apple.
GreenSky offers loans paid back over weeks and months, usually for large purchases. The company services a $9 billion loan portfolio and claims to have financed more than $30 billion overall.
