Holden Karau

How to make your health insurance company cry.

Holden Karau spent years pushing boundaries in big tech.

Apache Spark committer.

Google and Apple engineer.

Open-source pioneer.

But her latest project isn’t about cloud architecture or data pipelines.

It’s about rage. Red tape. And fighting back when your insurance company says no.

Gender-affirming care? Denied. Surgery after a motorcycle crash? Denied. Even a claim for her dog, Professor Timbit? Denied.

Holden built a system to say “hell no”.

After winning over 90% of her 40+ appeals, she did what any engineer with a grudge would do: she automated the fight.

Meet Fight Health Insurance.

A FREE, AI-powered platform that helps you appeal medical denials in under 10 minutes.

Because here’s the dirty secret no one tells you: Most denials can be appealed. And many should be.

But less than 1% of patients ever do.

Why?

Because the system is designed to exhaust you.

Because the process is confusing, slow, and filled with legal landmines.

Because even your doctor doesn’t have time to help.

Holden’s platform changes that.

Upload your denial letter.

The tool scans and strips your personal info.

It uses AI to infer your diagnosis, procedure, and why it’s medically necessary.

It gives you multiple tailored appeal letters to choose from... and edit if needed.

You send it off. And fight back.

“This is powered by an unreasonable willingness to take things too far. If insurance companies are going to deny us with bad logic, we’re going to beat them with good code.”