The new economic environment, characterized as volatile, uncertain, complex, and ambiguous, has been generated through the evolution of a world in which online reputation and corporate social responsibility have become closely interconnected. In this study, we assessed whether corporate social responsibility is a goal with multiple implications for the image of the organization and its financial results, which present a model for measuring online reputation in the context of optimizing corporate sustainability. We used an econometric approach that showed that the main purpose of the model is to determine the best value of the dependent variable by providing a number of new sets of explanatory variables on the exact quantification of the company’s online reputation. The main results can support the decision-making process in building and maintaining online reputation in the short or long term, and the information provided is useful for implementing online reputation management programs. We provide a rather nuanced picture of the relationship between the credibility of corporate sustainability claims, financial security, and the chance of preserving the online reputation built. The research shows that online reputation risk management is no longer optional; online reputation must become a strategic resource for sustainable business.