Onos Health has raised a $17 million Series A led by Costanoa, a wager that the single largest blind spot in behavioral health spending is not the claims data payers already have but the therapy notes they have never been able to read.

The round, announced August 26, 2026, included participation from CVS Health Ventures and Flare Capital Partners. No valuation was disclosed. The company was founded in 2024, is based in San Francisco and employs 18 people, bringing total capital raised to roughly $23.3 million in under a year. Two notes on the record: the VentureTerminal feed lists the lead as Costanoa Ventures, the firm former name, and names no co-investors, while press coverage credits three.

What the company does

Onos sells to the payer side, not the clinic. Its platform applies natural language processing to unstructured clinical documentation — therapy notes, intake forms, progress records — and converts it into structured signals health plans can act on for quality measurement, care-pathway decisions and cost management. The premise is a specific statistic the company leans on: more than 70 percent of behavioral health quality signals sit in unstructured notes, invisible to the claims-based machinery insurers run everything else on.

The founding team is a payer-operations team rather than a clinical one. Akshay Agrawal came from Bain and Company and Bain Capital with operating stints at mPulse and Presence; co-founder Josh Levitan has spent 15-plus years building technology for health plans and government health programs; Suhaas Prasad rounds out the trio.

The numbers behind the round

Onos is selling against measured outcomes rather than a pilot narrative, which is what makes an 18-person company a credible Series A at this stage. It reports 75 percent faster chart reviews, a 35 percent lift in adherence to evidence-based care standards, and more than 6 percent reduction in total behavioral health program costs within the first year of deployment.

Distribution is the harder number to argue with. The platform is live at Aetna and at three of the six largest US health plans — an unusual footprint for a company two years old, and one that explains CVS Health Ventures, Aetna corporate investor, appearing on the cap table. The prior round was a $6.3 million seed in October 2025 co-led by Haystack and Pathlight Ventures, with Bertelsmann Healthcare Investments and Nebular among earlier backers.

Why the timing matters

Behavioral health has become the line item payers can no longer manage by exception. It affects more than 23 percent of US adults annually and drives more than $140 billion in direct medical spend, and unlike most categories the clinical record is narrative text rather than codes. That mismatch has kept utilization management crude — prior authorizations, blunt network limits — at exactly the moment regulators and employers are pushing plans toward parity and measurable quality.

The proceeds go toward expanding deployment across major commercial insurers, Medicare Advantage plans and Medicaid programs. That last category is the real test: Medicaid carries the heaviest behavioral health burden and the thinnest documentation infrastructure, and it is where a language model reading clinical notes either proves durable or does not.

Source

HIT Consultant — "Onos Health Raises $17M to Transform Unstructured Behavioral Clinical Intelligence for Health Plans"