The intensive use of synthetic pesticides in pest control activities can cause resistance and therefore resurgence of target pests. Undesirable effects on the environment, including reduction in natural enemies (predators and parasitoids) and beneficial insects, are also possible. A major concern is the effects of synthetic pesticides on human health. In the last few decades, biopesticides have emerged as a potential alternative to synthetic insecticides. Currently, biopesticides share only a small portion of global pesticide market, but growth is faster in this area than in synthetic insecticides. This growth is mainly driven by a rising interest in the demand for organic agricultural products that is most pronounced in western countries. This review will discuss biopesticide history, categories, advantages, disadvantages, conventional and nonconventional extraction technology, and consumption.