Pro.com, Seattle

Pro.com helps homeowners check off tasks on their to-do lists by simplifying what it takes to complete a project. Founded in 2013 by former Amazon executives, the website essentially does all the planning for you. It researches the prices in your area on hundreds of different residential projects—from simple tasks such as window-washing to more complex projects such as closet installation; compiles a list of certified, background-checked professionals; and matches you with the best one for the job.