Bio Bulgaria Ltd is a Bulgarian company specialized in the production, distribution, marketing and trade of Bulgarian organic products under the Harmonica brand.

The company is a recipient of the Great Taste Producer award for its work, as well as being a certified B Corp for social and environmental responsibility. Harmonica's products are distributed in the store network throughout Bulgaria, as well as in other countries, and are in several different categories, the most popular being diary, waffles, eggs, tahini, syrups, soft drinks.

Harmonica marked its beginnings in 2006 and is still one of the leading companies to produce Bulgarian bio products. Under the Harmonica brand, a variety of products are offered, such as boza, jam, pretzels, milk products etc.