<p>Digitalization, e-commerce, and sustainability pressures have accelerated the transformation of the logistics sector, turning it into an industry that is rapidly evolving. However, this progress faces challenges, including poor infrastructure, slow technological adoption, and intense competition. Companies are therefore pushed to seek innovative ways to improve efficiency while meeting sustainability goals. One promising approach is horizontal collaboration. By pooling resources and capabilities, companies in similar positions can create synergies and overcome their own operational limitations. This study analyzes the literature on horizontal collaboration in logistics, focusing on research trends, methodologies, and thematic content. An extensive literature review was conducted using the Web of Science Core Collections database, and the resulting set of 133 articles is examined in detail. The review highlights emerging topics such as common infrastructure, fair distribution, digital technologies, cold chain logistics, and sustainability within collaboration frameworks. It also identifies research gaps that can inform practice and scholarship, offering insights for managers, policymakers, and future academic work. The findings emphasize the growing importance of horizontal collaboration in logistics and its expansion into diverse applications. Moreover, themes identified in the literature matter at strategic, tactical, and operational levels. Finally, the review underscores the role of collaboration in advancing economic, environmental, and social sustainability.</p>