We study synchronization and consensus in dynamical systems coupled via multiple directed networks. We show that even though the coupling in a single network may not be sufficient to synchronize the systems, combination of multiple networks can lead to synchronization. We illustrate how the effectiveness of a collection of networks to synchronize the coupled systems depends on the graph topology and show that if the graph sum is a directed graph whose reversal contains a spanning directed tree, then the network synchronizes if the coupling is strong enough. This is intuitive as there is a root node that influence every other node via edges where each edge is in one of the networks.