 Indigo’s Series D in 2016 was noted to be the largest private equity financing in the agricultural technology sector.In September 2017, the company raised USD$156 million, giving it a total valuation of USD$1.4 billion and making it a "unicorn", the term given to start-ups worth more than USD$1 billion.Indigo's seed treatments contain microbes that live within plant tissue, unlike existing microbial seed treatments that contain microbes that live around the roots.