Growing demands for environmentally-friendly and sustainable crop pest management increased the interest for biopesticides as an alternative to the synthetic chemical pesticides. This review presents the current status of bioacaricides defined as commercial biopesticide products based on microorganisms (microbial acaricides) and biologically active substances of microbial, plant or animal origin (biochemicals and semiochemicals), used in crop protection against spider mites (Tetranychidae) and other plant-feeding mites. The most important microbial bioacaricides are mycopesticides, products manufactured from living propagules of Beauveria bassiana s.l. and several other acaropathogenic fungi. Products based on avermectins and milbemycins, secondary metabolites of actinomycetes, are well-known examples of biochemicals of microbial origin. Among biochemicals of plant origin, the most widely used have been the products based on pyrethrum, obtained from the Dalmatian daisy, Tanacetum cinerariifolium (Asteraceae), and azadirachtin, obtained from the Indian neem tree, Azadirachta indica (Meliaceae). In the recent years, products based on the essential oils from aromatic plants belonging to the families Lamiaceae, Myrtaceae, Rutaceae and others, have also gained increasing importance in the market. Special emphasis in this review is given on the compatibility of bioacaricides with predatory mites from the family Phytoseiidae as natural enemies used in the integrated management of plant-feeding mites.