Big Health
Big Health is a Digital Therapeutics company founded in 2010 and based in San Francisco, United States. It has raised $153M in total funding, most recently a Growth in 2026.
Big Health develops FDA-cleared digital therapeutics — Sleepio for insomnia and Daylight for anxiety — delivered as automated cognitive behavioral therapy through a mobile app. Sleepio deployed across NHS Scotland and England. 14+ RCTs. $75M+ raised including Series C. Layoffs in 2023 amid DTx market downturn. Daylight for anxiety is FDA-cleared.
Big Health has two of the most rigorously studied digital therapeutics with multiple RCTs published in JAMA and Lancet journals; Sleepio's NHS deployment is one of the few examples of a DTx adopted into a national health system.
bighealth.com ↗·Digital Therapeutics·
United States·private 
