Knock is an online marketplace offering a radical new way to sell a home quickly without risk, stress and uncertainty. Homes are our largest purchase and most valuable asset, but they are also the most difficult to buy and sell. Knock guarantees homeowners that we can sell their home in less than 6 weeks or we buy it ourselves for market price. We guarantee homebuyers that our homes are rock solid with our 200-point home-inspection, certification and extended warranty.