In economies that are based on natural resources, efforts to achieve sustainability still seem unclear, especially in manufacturing companies. As a result, from a business perspective, many manufacturers have adopted various strategies to maintain their competitiveness in line with environmental regulations. In addition to product and process innovation, we have analyzed innovation based on product–service innovation (PSI), or servitization, which is seen as key to promoting more resource-efficient economies. This study examines the effects of innovation strategies on productivity and environmental impact. Based on data extracted from the National Innovation Survey of the manufacturing industries of Peru, a sample of 791 companies were analyzed. Our findings indicate that, although only a few companies carry out product and process innovation and especially product–service innovation, when they do, they have a positive effect on both productivity and environmental impact. However, this relationship is affected by the size of the company. Thus, the innovation strategies have a greater positive effect on environmental impact in large companies than companies with fewer than 50 employees. Finally, despite the importance of product–service innovation, it seems that this strategy is not yet established in Peruvian manufacturing companies. Given the positive effect on productivity and environmental impact, we conclude by emphasizing the importance of establishing public policies aimed at disseminating and promoting this type of innovation, with specific support for companies with fewer than 50 employees.