Secondary metabolites derived from plants are diverse range of small molecules with significant pharmaceutical, nutraceutical, and industrial applications. Bioreactors have proved as indispensable tools for the sustainable and controlled generation of these important biochemical compounds. Bioreactors offer precise regulation of vital factors like light, temperature, humidity, nutrient availability, which are essential for optimizing both plant growth and secondary metabolite biosynthesis. Different bioreactor configurations such as airlift, stirred-tank, and photo-bioreactors, provide precise environments for plant cell culture. Bioreactors circumvents challenges associated with traditional plant cultivation, including seasonal variations, limited land availability, and susceptibility to environmental stresses and pathogens. Additionally, bioreactors facilitate secondary metabolite synthesis from rare or endangered species while safeguarding biodiversity. Several researchers have focused on bioreactor design and process optimization that hold promise for further unlocking the potential of plant biotechnology in secondary metabolite production.