The competitiveness of markets has put pressure on the management more than before to identify the criteria that measure the value of the company correctly. Therefore, the purpose of this study was to investigate the effect of competition in the product market on the relationship between information transparency and corporate governance with firm value. For this purpose, a sample consisting of 130 companies listed on the Tehran Stock Exchange from 2015 to 2022 was selected by systematic elimination method and tested based on multiple regression. The results showed that the information transparency of the company leads to an increase in the value of the company. In addition, corporate governance has a positive and significant relation with the firm value. The results showed that competition in the product market does not have effect on the relationship between information transparency and the firm value, and also on the relationship between corporate governance and company value. Therefore, it can be said that by increasing the information transparency and the quality of corporate governance, the firm's future value will increase. Also, the competition in the product market does not moderate the relation between information transparency and the company's value, as well as the relation between corporate governance and the company's value.