Abstract Objectives Tribolium castaneum and Drosophila melanogaster are prominent insect model organisms for investigating developmental and evolutionary processes. Both have a significant kit of genetic and molecular tools and a substantial quantity of omic data at their disposal, which makes this species pair suitable for comparative genomic and gene function studies. However, for such comparisons, a rigorous assignment and compilation of the orthologs that these organisms share are essential. Here, we generated and provided a list of orthologous genes between Drosophila and Tribolium , which will be useful for future comparative genomic studies. Data description We made use of the reference proteomes of Tribolium castaneum and Drosophila melanogaster to infer phylogenetic orthology using the OrthoFinder platform, and employed the eggNOG 6.0 database and manual phylogenetic tree analyses to assess our results. Our analysis identified more than 9,000 orthologous genes between Drosophila and Tribolium. We posit that this comprehensive list is a valuable resource for comparative studies among these insect species, such as single-cell sequencing or large-scale gene function comparisons. The results are open-access and freely available for download or interactive exploration in iBeetleBase.