Pensoft Publishers are a publisher of scientific literature based in Sofia, Bulgaria. Pensoft was founded in 1992, by two academics: Lyubomir Penev and Sergei Golovatch. It has published over 1000 academic and professional books and currently publishes over 60 peer-reviewed open access scientific journals including ZooKeys, PhytoKeys, Check List, Comparative Cytogenetics, Journal of Hymenoptera Research, Deutsche Entomologische Zeitschrift, Metabarcoding & Metagenomics and Zoosystematics and Evolution.