An innovative enterprise that has just entered the market is known in the literature as a startup; these firms, when evaluated with traditional methods (internal rate of return, IRR; net present value, NPV; and benefit-cost ratio, BCR), are often rejected because they do not have enough financial information. The aim of this study is to determine whether the incorporation of Real Options and Critical Values methodologies to traditional valuation methods adds value to startup companies. The case explored was a bioplastics plant. To calculate the call option when increasing production, the Black-Scholes method, which consists of an equation and five variables, was used. To calculate the maximum benefit that the project must have with regard to investment, and taking into account price volatility, critical values were used. The results show that with traditional evaluation the project was rejected by obtaining a negative NPV, while the option of expanding increased the project‟s value. Analysis of the critical values shows that the most favorable input for bioplastics production is corn in Mexico, and cane in the United States. Therefore, to improve decision-making, traditional valuation tools must be integrated with the real options and critical values methodologies, especially when the companies are startups and/or they are facing risk and uncertainty.