LunaBill YC Application

Fall 2025Active

LunaBill went through Y Combinator in the Fall 2025 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: Fall 2025
Industry: HealthcareHealthcare IT
Team size: 4
Status: Active
Launched: 2025

Founders

Suhail ParryFounder
David DayFounder

What LunaBill does

LunaBill is building AI Voice callers for healthcare billing teams. Insurance claim follow-up calls account for the 80% of the daily workload of a healthcare billing team, with each call averaging 30 minutes. Since our launch in July we are now at $764K in contracted ARR, of which $428K is live revenue and the rest will go live by January 2026. Our customers see a 10x increase in claims followed up per biller in the first week and we have converted 100% of pilots to paying customers. We have automated 50,000+ calls and signed partnerships with top healthcare leaders like UC health systems, Mayo, Experian Health and more. The founders have known each other for over a year. Suhail is a 2x founder, with 3+ years of experience building in healthcare including operating a medical billing company with 200+ healthcare clients. David founded Skiesoft, Taiwan’s biggest healthcare AI scribe company, used by 120k+ healthcare professionals. He also worked as a data scientist at UCSF, building models to audit medical-coding accuracy. Yash was a researcher at various hospital systems including Mayo Clinic.

LunaBill's YC application, reconstructed

Y Combinator application

LunaBill, Fall 2025 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

LunaBill

Describe what your company does in 50 characters or less.

AI Voice callers for healthcare billing teams

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

We built an AI voice calling system that automates insurance claim follow-ups for healthcare billing teams. These calls take up 80% of a biller's day, typically running 30 minutes each. Our AI can handle these conversations, freeing up billers to focus on exceptions and complex cases.

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

We live in San Francisco, CA, and plan to keep the company based here after YC.

Explain your decision regarding location.

San Francisco is where we all currently live and it has the healthcare tech ecosystem we need to grow fast. Being close to partners and customers also helps.

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 LunaBill YC application?

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