Many often think they're one in the same, so here's the break down:
Sprouts (like bean sprouts and alfalfa sprouts) are grown entirely in water and usually in a glass or other forms of container. Sprouts have little to no exposure to light and the seeds germinate within 24-48 hours. They are then ready to be consumed – roots and all.
Conversely, microgreens are planted in either soil or soil-less medium with the right amount of water, nutrient, oxygen, and then exposed to light. The seeds germinate and are grown to about 1-3 inches becoming microgreens and then generally harvested within 8-10 days above the roots. Microgreens have more variety and intensity in flavors and are packed with a powerful combo punch of vital nutrients and vitamins.