Euvoria is an online business that specialized in fashion, especially woman’s clothing. Euvoria combined the art of Indonesia’s culture and nature into a fashion product. Euvoria is one of the fashion brand that is supported the earth program by using all the natural ingredients for its clothing materials, coloring ingredients, until the packaging. As fashion business is one of the red-ocean business, and before starting a fashion business industry there will a lot of important things to do such as business validation. Based on a case study of Euvoria, the purpose of this study is to explain and identify the validation process followed by Euvoria’s business development strategies. The research method is using applied research type action research. The data then analyzed by the qualitative and quantitative data that collected from interviews, surveys, company’s personal data, etc. This study objectively found the importance of business validation before starting a startup business that continued help business on their development process. The validation process that followed by the development strategy will further affect business performance and form the basis of this research.