Greendoor is a technology platform that is focused on home buyers. Greendoor empowers today's real estate buyer with three key things: 1. Search by Monthly Payment. Search for homes by the monthly payment that you can afford. 2. Search by Price Reductions. Search for homes by price reduction(s) so you know which sellers are motivated. 3. When you choose Greendoor to represent you we pay your first months mortgage payment.