Lumius (YC Spring 2026)

TL;DR: Lumius is a Y Combinator Spring 2026 startup Fast, smart, accessible 3D ultrasound that anyone can use, currently active with a team of 4.

Fast, smart, accessible 3D ultrasound that anyone can use

YC ID
31435
YC Batch
Spring 2026
Status
Active
Team size
4
Industry
Healthcare, Medical Devices
YC profile
https://www.ycombinator.com/companies/lumius

Last verified:

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 det…

Frequently asked questions

Is Lumius a YC (Y Combinator) company?

Yes. Lumius was funded by Y Combinator in the Spring 2026 batch. Fast, smart, accessible 3D ultrasound that anyone can use

What does Lumius do?

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 ye…

What YC batch was Lumius in?

Lumius was part of Y Combinator's Spring 2026 batch.

How big is Lumius?

Lumius has a team of 4 people according to Y Combinator's directory.

Is Lumius still active?

Lumius is currently listed as Active with a team of 4 in Y Combinator's directory.

More YC Spring 2026 companies

More Healthcare YC startups

Explore related YC hubs

Loading interactive view…