Lumius YC Application

Spring 2026Active

Lumius went through Y Combinator in the Spring 2026 batch as a Healthcare company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.

YC batch: Spring 2026
Industry: HealthcareMedical Devices
Team size: 4
Status: Active
Launched: 2026

Founders

Chenhang LiFounder
Luca MenozziFounder
Tri VuFounder

What Lumius does

Ultrasound today is still mostly 2D. Clinicians have to imagine the 3D anatomy in their head while also moving the probe at the same time. This makes procedures like vascular access hard to learn and perform consistently, especially for beginners. ~50% fail on their first attempt. Hospitals also spend millions each year on 2D ultrasound training. Meanwhile, existing 3D ultrasound devices can cost >10× as much. Lumius is building fast, smart, and accessible 3D ultrasound systems to eliminate this 2D guesswork. Our technology shows a clear, real-time 3D view of what’s inside the body. It works over a large volume, not just a thin slice. The device is also affordable, compact, and portable. We are starting with vascular access, especially central line. Future use cases include blood clot detection, tumor diagnosis, and biopsy guidance. Our long-term vision is a universal 3D ultrasound platform that brings easy-to-use, real-time imaging to a wide range of clinical and eventually consumer applications.

Lumius's YC application, reconstructed

Y Combinator application

Lumius, Spring 2026 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Lumius

Describe what your company does in 50 characters or less.

Fast, smart, accessible 3D ultrasound for everyone

What is your company going to make? Please describe your product and what it does or will do.

We're building a portable 3D ultrasound device that gives clinicians a clear, real-time volumetric view inside the body instead of a flat 2D slice. Our first product targets vascular access, especially central line placement, making it easier and more reliable for doctors and nurses to see what they're doing. The device is compact, affordable, and delivers large-volume imaging to reduce the guesswork that causes many failures with traditional 2D ultrasound.

Where do you live now, and where would the company be based after YC?

We live in Durham, NC, and the company will continue to be based here after YC.

Explain your decision regarding location.

Durham has a growing healthcare tech ecosystem and proximity to major hospitals and research centers, which helps us test and improve our device. Staying here means we're close to our partners and core team members.

21 more answers in the full application

Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.

See full application

Frequently Asked Questions

Is this the real Lumius YC application?

No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from Lumius's public data (launch notes, founder backgrounds, product description). It shows how a company like Lumius would present itself to YC, not the text they submitted.