Sleepio
The San Francisco-based company will add Limbix's SparkRx offering to its digital therapeutics portfolio.
The app has been recommended as an effective alternative to sleeping pills in the UK.
More than five million adults will be able to access to CBT through Big Health’s apps.
Using a digital therapeutic improved sleep, anxiety and depression more than other mental healthcare alone, according to a study published in Behaviour Research and Therapy.
Published in Sleep, the study calculated $681 of direct and indirect savings when the CBT app was given to those with insomnia over six months.
The funds will support new product development, as well as growth of its distribution channels and commercialization efforts.
But the sector still makes up just 15% of overall investment in the digital health market.
The former NHS medical director stepped down from the national role at the end of 2017 and became chair of Birmingham Women’s and Children’s NHS Foundation Trust.
These include Big Health, Ampersand Health and teenage mental health charity stem4.