Ex-Bain operators raise $17M to tackle behavioural healthcare’s data blind spot with AI

Onos Health has pulled in $17 million in Series A funding, with Costanoa leading the round and CVS Health Ventures plus Flare Capital Partners joining in. The raise comes less than a year after its earlier $6.3 million round, bringing the company’s total haul to roughly $23.3 million in under a year.

The pitch is simple enough to state and hard enough to matter: behavioural health data is buried in messy notes, treatment plans, and assessments, and legacy systems struggle to make sense of it. Onos says more than 70% of the signals health plans need live in that unstructured documentation. Its software is already live with Aetna and three of the six largest US health plans.

The company says the system can flag problems in near real time instead of waiting for months-long retrospective audits. Onos reports a 35% improvement in clinical standard adherence, a 75% improvement in review efficiency, and more than 6% lower behavioural health program costs within 12 months. That is a strong claim, and one health plans will not ignore.

This is also a bet on specialization. Innovaccer and HealthEdge already sell broader payer tools, but Onos is focused specifically on behavioural health documentation, which the big platforms have tended to treat as just another utilisation-management problem. That narrower focus is part of the appeal, especially as behavioural health has become a major cost driver and direct medical costs in the US already exceed $140 billion a year.

The founders have spent time on the payer side, and that matters here. CEO Akshay Agrawal worked at Bain & Company and Bain Capital before founding Onos in 2024 in San Francisco with Josh Levitan and Suhaas Prasad. The company now has 18 employees. CVS Health Ventures’ involvement suggests investors think this can become infrastructure, not just another analytics tool looking for a buyer.