The alignment of strategies among the enterprises that belong to collaborative networks is of increasing importance due to the influence on the networks operation success in the long term. This paper proposes a Decision-Support Tool for Strategies Alignment (DST-SA) to support SMEs in the selection of strategies that allow higher levels of alignment amongst all the strategies formulated by each partner. The DST-SA includes a mathematical model, a simulation software, and a programmed application, to address the strategies alignment process from a collaborative perspective. The result of the DST-SA is the identification of the strategies that are aligned and the proper time to activate these strategies with the main aim of obtaining higher levels of network performance.