Opendoor is an iBuyer; Redfin is a discount real estate brokerage. Redfin offers iBuying services through RedfinNow, which operates similarly to Opendoor. Both Opendoor and RedfinNow give fast cash offers on homes and allow the seller to close within a week or two. However, RedfinNow charges a variable fee of 5–13% for their service, while Opendoor has a flat 5% service fee. See how Opendoor and Offerpad compare.