In this paper, we address the issue of IT organizational alignment in terms of internal consistency within IT-enabled organizational patterns: mechanistic versus organic. To test our model, we have used data collected due to a large multisector survey conducted within 1900 European firms. Our findings stipulate that complementarities between coordinationoriented IT and organic organizational designs are higher than complementarities between Control-oriented IT and mechanistic organizational designs and imply higher levels of performance for the firm.