The cost of developing an online marketplace app like TaskRabbit depends on various factors, but the app design and the choice of the platform are the most evident ones. If you use the technologies, tools, and features that we described in this blog to develop the app, the cost of the app will be between USD 30,000 to USD 40, 000. But you must note one thing that this cost may increase or decrease depending on the platform choice and the design needs.