Prosper AI Raises $30 Million Series A Led by a16z to Build the AI Workforce That Runs the Entire Patient Journey, From First Call to Final Payment
Prosper AI has raised $30 million in a Series A funding round led by Andreessen Horowitz, with participation from Base10 Partners and continued support from Emergence Capital, Y Combinator, and Company Ventures. The round was announced on June 22, 2026, and brings the company's total disclosed funding to approximately $35 million, following a $5 million seed round in September 2025. In the six months between that seed and this Series A, Prosper AI grew its revenue fivefold, added more than 40 healthcare organisations as customers, expanded its platform to cover more than 150,000 healthcare providers, and became the system powering more than $1.3 billion in patient care. The company now wins approximately 80 percent of the competitive evaluations it enters.
The capital will fund expansion of the company's engineering and customer‑facing teams, deeper integration with the largest electronic health record platforms, and accelerated adoption among provider groups and health systems across the United States.
The $450 Billion Problem Nobody Has Solved
Every patient appointment in the American healthcare system depends on a chain of administrative tasks that happen before and after the doctor is ever in the room. Someone has to answer the phone, verify that the patient's insurance is active and covers the procedure, confirm the patient knows their out‑of‑pocket costs, schedule the appointment directly into the provider's calendar, follow up on billing after the visit, and call the insurance company when a claim stalls or requires additional documentation.
This work is not incidental. It is the operational and financial backbone of every medical practice, hospital system, and specialty group in the country. And it is extraordinarily expensive to do manually. Independent research estimates the cost of billing and insurance‑related administrative work in US healthcare at somewhere between $400 billion and $496 billion annually. The figure the industry most commonly cites is more than $450 billion per year in pure administrative waste, a number that reflects the scale of the workforce, the fragmentation of the systems, and the chronic inefficiency of a process built on phone calls, fax machines, and manual data entry across incompatible platforms.
What makes this problem persistent is not a lack of awareness but a lack of a system capable of doing all of it at once. The first generation of healthcare voice AI companies, including well‑funded players like Nuance, Verint, and Infinitus Systems, focused on individual tasks. Scheduling AI. Billing AI. Prior authorisation AI. Each solved a piece of the workflow. None of them connected the pieces.
What Prosper AI Actually Does
Prosper AI was founded in 2023 by Xavier de Gracia and Josep Mingot, both MIT and Harvard alumni, with the company initially operating across multiple industries before narrowing its focus entirely to healthcare in 2024. That narrowing was the decision that shaped everything that followed.
The platform answers patient calls, schedules appointments directly into the electronic health record, verifies insurance benefits, automates patient billing, and contacts insurers by phone when additional information is needed. It does not surface these tasks for a human to complete. It completes them. An AI agent picks up an incoming patient call, accesses the provider's scheduling system in real time, screens the patient's insurance coverage against the specific appointment type, books the slot, confirms the patient's financial responsibility, and logs the interaction in the EHR. When a claim requires a follow‑up call to the insurer, an agent handles that call, navigates the payer's phone system, waits on hold, and retrieves the information without any human listening to hold music.
The result, according to the company, is a reduction in provider administrative costs of more than 40 percent while simultaneously giving patients clearer visibility into their coverage and financial obligations before care is delivered. That combination, cost savings for the provider and better information for the patient, is what has driven the land‑and‑expand pattern that convinced Andreessen Horowitz to lead the round.
Jay Rughani, partner at a16z, described the dynamic directly. Providers would deploy Prosper AI for scheduling, then quickly ask them to take on insurance verification, then billing, and so on. That pull‑through, he said, only happens when the technology can consistently guide patients through the care journey end‑to‑end.
The EHR Platform Endorsements That Matter
In enterprise healthcare software, the most credible commercial validation is not a startup case study or a self‑reported win rate. It is selection by the large EHR and revenue cycle platforms that already sit inside the organisations a company is trying to sell to.
Athenahealth, which serves over 60 million people through its EHR platform, adopted Prosper after reviewing other AI vendors. ImagineSoftware, a revenue‑cycle platform used by more than 100,000 physicians, did the same. Sam Khashman, ImagineSoftware's chief executive, confirmed that in repeated side‑by‑side evaluations, Prosper AI achieved the highest accuracy and completion rates, and now handles thousands of conversations per day across multiple clients on the platform.
Those two selections are commercially significant in a way that a list of direct hospital customers is not. When Athenahealth and ImagineSoftware embed a vendor into their platform, every new customer they bring on is a potential Prosper AI deployment without an additional sales cycle. The platform relationship converts individual customer acquisition into network‑level distribution, compressing the cost and time of growth in a way that direct enterprise sales cannot replicate.
The Competitive Landscape and the a16z Dual Bet
The category Prosper AI occupies is attracting substantial investment. Infinitus Systems, which pioneered the AI‑calls‑your‑insurer model, has raised over $100 million, with Andreessen Horowitz leading its Series C in 2024. This means a16z is now investing in two startups focused on related workflows in the same industry simultaneously.
Jay Rughani addressed this apparent contradiction directly, framing Prosper's differentiation as the scope of its ambition rather than a feature distinction. Prosper AI stood out, Rughani said, because they want to eliminate every administrative friction point between a patient and the care they need. Infinitus focuses on the outbound call to insurers. Prosper is building the system that manages every inbound and outbound interaction across the full patient journey, positioning it as an operating layer rather than a specialised point solution.
The broader market context supports the scale of that ambition. Global healthcare revenue cycle management was valued at approximately $136 billion in 2023 and is expected to reach $453 billion by 2034. The portion of that market that can be automated by agentic AI rather than managed by human staff is, by the company's own estimate, a large majority of the workflow.
The Fully Agentic Vision
De Gracia has described Prosper's vision as being completely agentic. Voice is just one channel for coordinating patients, providers, and insurance companies. The platform also uses APIs, manages fax‑based workflows, and deploys browser‑based AI to retrieve information from insurance portals. What the company is building, he said, is a workforce that helps across the full journey from pre‑visit to post‑visit.
That framing is the most commercially ambitious version of what Prosper AI could become. Not a voice agent company. Not a scheduling tool. A workforce layer that sits between the healthcare provider and every administrative system it depends on, operating autonomously across every channel through which healthcare administration currently runs.
De Gracia believes that three to five years from now, larger patient groups and health systems will have a layer of workforce that is AI rather than human, complementing rather than replacing the work that humans do, and that EHRs will partner to build that layer on top of the electronic health record.
Key facts as of the announcement:
- Series A: $30 million, led by Andreessen Horowitz (a16z)
- Additional investors: Base10 Partners, Emergence Capital, Y Combinator, Company Ventures
- Total funding: approximately $35 million (including $5 million seed, September 2025)
- Revenue growth: fivefold in six months since seed round
- Healthcare providers on platform: more than 150,000
- Patient care powered: more than $1.3 billion
- Administrative cost reduction for providers: more than 40%
- Competitive win rate: approximately 80%
- New customers added: more than 40 healthcare organisations in six months
- Founded: 2023, by Xavier de Gracia and Josep Mingot (MIT and Harvard alumni)
- Headquarters: Madrid and New York
The Series A is the clearest signal yet that a16z has concluded the healthcare administrative AI category will produce at least one dominant platform, and that the company most likely to build it is the one that refuses to stop at scheduling. Whether Prosper AI can sustain its 80 percent competitive win rate and fivefold revenue trajectory as better‑capitalised incumbents deepen their own AI capabilities is the question the $30 million is now designed to answer. The land‑and‑expand pattern from scheduling to insurance to billing to reimbursement is working. The test now is whether it works at the scale of the entire American healthcare system.
