New funding: Doorstead, a San Francisco real estate property management startup founded by former Uber employees, raised a $12.5 million Series A round led by Seattle firm Madrona Venture Group. Company background: The 2-year-old startup targets 15 million small real estate investors who own single-family units and need help renting out their space. It provides data on optimal rental prices and offers a guaranteed rental offer in less than 24 hours. Doorstead also manages the property, including preparing it for lease, the screening of tenants, and negotiating rent.