A Y Combinator Winter 2025 company, Mecha Health sells per-scan AI report drafting to radiology and teleradiology practices rather than to individual clinicians. Its earliest named partner is AmeriRad, one of the largest privately owned US radiology groups, integrating the model into live workflows.
Mecha Health is a San Francisco startup founded in 2024 that builds foundation models drafting radiology reports, chest X-rays first, for physician review. Its differentiator is training smaller, cheaper models tuned to a single practice's case mix instead of one general-purpose system.
Founded: 2024 · HQ: San Francisco, CA, USA · Team: 4-10 · CEO: Ahmed Abdulaal · Funding: $4.6M total across 2 rounds; $4.1M seed (Nov 2025, lead: Valia Ventures; also Y Combinator, Foundation Capital, Liquid 2 Ventures, Goat Capital, 10100, SNR)
About Mecha Health
Mecha Health was founded in 2024 in San Francisco by four co-founders: CEO Ahmed Abdulaal, a physician trained at Imperial College London and a UCL Microsoft PhD Scholar with 20+ peer-reviewed papers, previously on AstraZeneca's foundation-modeling team; CTO Nina Montana Brown, who holds a UCL PhD in AI for surgical vision and navigation and has published at NeurIPS, ICLR and MICCAI; COO Ayodeji Ijishakin, a UCL PhD in medical-imaging machine learning focused on diffusion models and founder of the London Founders Club; and CSO Hugo Fry, a Cambridge-trained mathematician and theoretical physicist and MATS scholar in mechanistic interpretability. The company describes itself as an applied AI lab building models that read medical images and draft radiology reports for physician review, working at the intersection of clinical medicine, machine-learning research and practical deployment. The company's first model, released in late 2024 and iterated through Mecha Net v0.2 (published June 24, 2025), generates draft chest X-ray reports and is benchmarked on CheXbert Micro and Macro F1 scores against other report-generation systems, including Google's MedGemma. Mecha Health's own account of the results, published on its research blog, states the model beat comparable systems from Microsoft, Google and OpenAI on clinical accuracy metrics while using roughly two orders of magnitude fewer parameters and about a quarter of the training data; this comparison has not been independently peer-reviewed. Two named products, Mecha XR for radiographs and Mecha CT for computed tomography, extend the same approach across imaging modalities, with draft findings the company says are linked back to the specific regions of the source image that generated them rather than delivered as opaque text. Mecha Health has raised $4.6M in total across two rounds, most recently a $4.1M seed round that closed in November 2025 led by Valia Ventures, with participation from Y Combinator, Foundation Capital, Liquid 2 Ventures, Goat Capital, 10100 and SNR, alongside angel investors including Dropbox co-founder Arash Ferdowsi, former Twitch CEO Emmett Shear and Mercury co-founder Immad Akhund. The company went through Y Combinator's Winter 2025 batch. Y Combinator's own company listing puts the founding team at 4; a separate 2026 company-tracking source lists headcount at roughly 10. Mecha Health's earliest clinical relationship is with AmeriRad (American Radiology Solutions), one of the largest privately owned radiology practices in the US, which is integrating Mecha Health's model into its teleradiology workflow; the company also cites a second, unnamed multinational tele-radiology partner. The stated goal for both partners is to move radiologists from reading roughly one scan per hour to about one every five minutes. Mecha Health competes for radiology-report and medical-imaging AI budget against better-funded rivals such as Rad AI, which focuses on structured report drafting for radiology groups, and diagnostic-triage platforms like Aidoc and Annalise.ai. Mecha Health's pitch is a smaller, cheaper-to-train foundation model tuned to a practice's own case mix rather than one general-purpose model, sold on a per-scan basis into a market it estimates at $40B+ for X-ray report generation alone.
Mission
An applied AI lab building models that read medical images and draft radiology reports for physician review.
Products
- Mecha XR (Radiograph (X-ray) report drafting foundation model): https://www.mecha-health.ai/
- Mecha CT (CT report drafting foundation model): https://www.mecha-health.ai/
- Mecha Net (Research model line (chest X-ray report generation, v0.1/v0.2)): https://www.mecha-health.ai/blog/Mecha-net-v0.2
Links
Frequently Asked Questions
How much funding has Mecha Health raised?
Mecha Health has raised $4.6M total across two rounds. The most recent, a $4.1M seed round, closed in November 2025 led by Valia Ventures, with Y Combinator, Foundation Capital, Liquid 2 Ventures, Goat Capital, 10100 and SNR also participating, alongside angel investors including Arash Ferdowsi, Emmett Shear and Immad Akhund. No post-money valuation has been reliably disclosed.
What products does Mecha Health make in 2026?
Mecha Health builds Mecha XR, a foundation model that drafts radiograph (X-ray) reports, and Mecha CT for computed tomography, both aimed at radiology and teleradiology practices rather than individual consumers. Pricing is per scan and negotiated directly with each practice; there is no public self-serve price list.
Does Mecha Health publish compliance certifications?
Mecha Health has not published SOC 2, ISO 27001, HIPAA attestation, or a public trust center as of this review. The company works directly with radiology and teleradiology partners on data handling, but no third-party compliance certification is publicly documented.
Who are Mecha Health's main competitors?
Rad AI is the closest comparison on structured radiology report drafting, with far more capital and an established customer base. Aidoc and Annalise.ai compete on broader medical-imaging diagnostic AI; Mecha Health's pitch is a smaller model retrained to each practice's own case mix rather than one shared general-purpose system.
How do you start using Mecha Health's products?
Mecha Health does not offer self-serve signup. Its site's only calls to action are a LinkedIn presence and a 30-minute booked call with the team, reflecting a direct-sales model aimed at radiology practices and teleradiology companies rather than individual radiologists.