# Onos Health raises $17M to turn behavioral-health notes into payer intelligence > Source: > Published: 2026-08-26 14:54:14+00:00 # Onos Health raises $17M to turn behavioral-health notes into payer intelligence **Costanoa led the round, with Flare and CVS Health Ventures joining as Akshay Agarwal expands the platform beyond manual payer reviews.** By [RuntimeWire Staff](/author/runtimewire-staff) ยท Published Primary source: [PR Newswire](https://www.prnewswire.com/news-releases/onos-health-raises-17-million-series-a-to-accelerate-adoption-of-its-behavioral-health-ai-platform-for-health-plans-302860046.html) ## Why it matters Onos is using behavioral health as a focused entry point into the larger market for payer AI. CVS Health Ventures' investment and, separately, the named Aetna deployment give Akshay Agarwal valuable enterprise credibility, but repeatable clinical and cost evidence will determine whether the product becomes infrastructure or remains a specialized review tool. [Akshay Agarwal](https://onoshealth.com/company/about/?ref=runtimewire), who spent his career advising and building for health plans before co-founding [Onos Health](https://onoshealth.com/?ref=runtimewire), has raised a $17 million Series A to sell insurers an AI system that reads the behavioral-health records their legacy software largely leaves untouched. The San Francisco company [announced the financing on August 26th](https://www.prnewswire.com/news-releases/onos-health-raises-17-million-series-a-to-accelerate-adoption-of-its-behavioral-health-ai-platform-for-health-plans-302860046.html?ref=runtimewire). [Costanoa](https://costanoa.vc/?ref=runtimewire) led the round, with [Flare Capital Partners](https://www.flarecapital.com/?ref=runtimewire) participating and [CVS Health Ventures](https://www.cvshealthventures.com/?ref=runtimewire) making a strategic investment. Separately, Onos says Aetna is using the platform, though it has not detailed the size or scope of that deployment. Agarwal founded Onos with chief product officer Josh Levitan and chief technology officer Suhaas Prasad. Agarwal previously advised health-plan executives at Bain & Company, invested in healthcare at Bain Capital, and held executive roles at member-engagement provider mPulse and virtual behavioral-health provider Presence. His co-founders bring the two other pieces Onos needs: Levitan has spent more than 15 years building products for health plans and government healthcare programs, while Prasad previously spent about a decade building creator-marketing software company AspireIQ and holds a machine-learning master's degree from Stanford. That mix explains the pitch. Onos is built around payer operations, clinical review and enterprise software deployment rather than consumer therapy or patient-facing chatbots. Agarwal is betting that insurers will pay for a better view of what happens inside behavioral-health treatment, where much of the useful information sits in session notes, assessments and treatment plans. ### The wedge is unstructured clinical data Onos combines claims and utilization records with unstructured clinical documentation. Its models produce case summaries, compare treatment against health-plan guidelines, map care across settings and flag patterns that may indicate poor-quality or unnecessarily expensive treatment. Onos says more than 70% of behavioral-health quality signals are found in unstructured documentation. Its [technology materials](https://onoshealth.com/technology/?ref=runtimewire) describe applications across utilization management, clinical quality, program integrity and provider-network management, covering areas including applied behavioral analysis, substance-use disorder and serious mental illness. This is an infrastructure sale into organizations where clinical decisions, data security and regulatory scrutiny make deployment slow. Onos says clinicians retain oversight and that its software supports clinical decision-making instead of automating it. Those controls are central to winning payer contracts, particularly when the product is analyzing sensitive notes and recommending which cases deserve further review. Agarwal's founding thesis grew from the operational burden he saw around health plans. Payer teams often review cases retrospectively, with clinicians manually working through documentation before authorization or quality decisions can be made. Onos aims to move that work earlier, giving plans a population-level view of care while directing clinical staff toward cases that require judgment. ### CVS Health Ventures invests as Aetna uses the platform CVS Health Ventures' strategic investment adds a corporate investor to a round whose announcement separately names Aetna among Onos' health-plan users. The investment gives Onos another relationship in the payer market as it expands its commercial footprint. For an enterprise healthcare startup, those relationships can matter as much as the check. Sales cycles depend on security reviews, data integration, clinical validation and support from several internal buyers. A recognized payer deployment gives Agarwal evidence that Onos can pass those gates, although the economics and breadth of the Aetna deployment remain unclear. In its [financing announcement](https://www.prnewswire.com/news-releases/onos-health-raises-17-million-series-a-to-accelerate-adoption-of-its-behavioral-health-ai-platform-for-health-plans-302860046.html?ref=runtimewire), Onos says it is trusted by three of the six largest health plans in the country. Onos has not published contract values, covered-member counts or revenue, so its commercial scale cannot be inferred from that company-reported claim alone. ### Prior funding brings the disclosed total to at least $23.3 million The Series A follows a prior [$6.3 million financing announced by Onos](https://onoshealth.com/news/onos-health-raises-6m-to-transform-how-health-plans-manage-behavioral-health/?ref=runtimewire), co-led by [Haystack](https://www.haystack.vc/?ref=runtimewire) and [Pathlight Ventures](https://www.pathlight.vc/?ref=runtimewire), with Bertelsmann Healthcare Investments and Nebular participating. The two announcements bring Onos' publicly disclosed funding to at least $23.3 million. Onos did not attach a valuation to the Series A. The larger round suggests Agarwal found enough payer demand to fund a broader deployment push. It also places Onos in a well-funded group pursuing health-plan automation. [Anterior raised $40 million on February 12th](https://www.anterior.com/insights/anterior-raises-40m-series?ref=runtimewire) for a broader clinical AI platform spanning payer workflows. Onos is choosing a narrower entry point. Behavioral health gives it a category with fragmented records, specialized clinical guidelines and considerable variation in treatment patterns. That focus could let Onos build deeper models and a more defensible data layer than horizontal payer software. It also ties growth closely to health plans' willingness to change how they review behavioral-health care. ### The outcome claims need context In its [financing announcement](https://www.prnewswire.com/news-releases/onos-health-raises-17-million-series-a-to-accelerate-adoption-of-its-behavioral-health-ai-platform-for-health-plans-302860046.html?ref=runtimewire), Onos reports a 35% improvement in adherence to clinical standards, a 75% improvement in clinical-review efficiency and a greater than 6% reduction in behavioral-health program costs within 12 months. Its [homepage](https://onoshealth.com/?ref=runtimewire) separately reports a 16-times increase in clinical-team productivity, a 90% AI accuracy rate and $56.5 million in claimed clinical-cost savings for a mid-sized regional plan. Those are company-reported results. Onos has not published enough detail about the populations, baselines or evaluation methods to treat them as general performance benchmarks. The figures may reflect different customers and use cases, making direct comparison difficult. That distinction matters because cost reductions and faster reviews will drive purchasing decisions, while model accuracy alone will not establish that members received better care. Onos' most consequential claim is the 35% increase in clinical-standard adherence. If that holds across deployments, Onos has a case that its software improves the substance of payer oversight instead of merely processing the same reviews faster. Agarwal will need to turn those internal results into repeatable evidence as Onos expands beyond early adopters. ### What the round buys Onos says the Series A will accelerate adoption across health plans. That work will require connecting with payer data systems, adapting models to plan guidelines, validating outputs with clinicians and placing technical staff close to customer workflows. The funding gives Agarwal room to build that delivery capacity while pursuing additional national and regional plans. The bet is straightforward: behavioral-health spending cannot be managed well when the clinical record is functionally invisible to the payer. Agarwal and his co-founders have raised $17 million to make that record measurable. Their next test is proving that better visibility consistently produces better care, rather than another layer of review around it.