The US start-up Bunkerhill Health has raised additional capital in a Series B round led by Khosla Ventures, increasing its total funding to 55 million dollars. The Carebricks platform lets hospitals build and run their own AI agents for clinical and administrative workflows. With the money, the company is expanding the software to more US clinics.
Clinic AI agents take on concrete care tasks
Carebricks works according to Bunkerhill Health as a kind of operating system for AI agents inside hospitals: departments build their own assistants for recurring tasks without depending on individual outside software vendors. At the University of Texas Medical Branch (UTMB), more than twenty such agents are already running in production. A coronary calcium detection agent identified a patient at acute risk of a heart attack in its first month, who then received an emergency triple bypass. A nephrology triage agent cut the wait for a specialist appointment by more than half, while another agent for lung nodule tracking sped up handling of urgent cases by 80 percent and doubled guideline-concordant follow-ups. These figures come exclusively from the company itself and are independently unverified. Nine of the deployed algorithms already hold clearance from the US Food and Drug Administration for clinical use. According to the company, at least fifteen health systems use the platform, including UTMB as well as Cleveland Clinic, Mayo Clinic, Ballad Health and Intermountain Health.
Investors bet on operations rather than diagnostics
The round is led by Khosla Ventures, with existing investors Sequoia Capital, Felicis, Optum Ventures and Y Combinator participating again. Khosla states according to Fortune that the bottleneck in healthcare AI was never the technology, but getting a health system to actually run it. Bunkerhill is thus positioning itself deliberately against much of the competition, which mostly focuses on single diagnostic applications. CEO Nishith Khandwala frames the approach by saying every leading health system has more opportunities to improve patient outcomes than its workforce has capacity to address. UTMB Chief AI Officer Peter McCaffrey says the biggest problems in hospitals do not require superintelligence, just average intelligence applied at scale. Bunkerhill Health was founded in 2019 by Stanford graduates Nishith Khandwala and David Eng and, unlike many competitors, focuses on administrative rather than purely diagnostic processes. The current round follows a seed and a Series A round, whose individual sizes the company does not disclose separately, citing only the combined total of 55 million dollars.
What matters now is whether Bunkerhill’s bet on operational processes still pays off once the platform scales beyond its current fifteen health systems. So far, the company has published only its own performance figures for individual pilot agents, and an independent review of error rates or rejected cases is still missing. Bunkerhill Health has not said how many new clinic partnerships will follow this year.
