Canadian Holden Karau decided to create Fight Health Insurance after her own frustrations navigating the US healthcare system.Holden KarauHolden Karau works in Big Tech during the day and builds her startup, Fight Health Insurance, at night.Karau said personal experiences with health insurance denials led her to create the platform.The platform uses AI and machine learning to streamline the insurance appeal process.Holden Karau works as an open-source engineer in California — but just about every day after work, she's building Fight Health Insurance, a free AI-powered platform designed to help people appeal healthcare claim denials.The 38-year-old Canadian has worked in the big data space for years, previously holding jobs at every FAANG company aside from Facebook.Karau told Business Insider that while she had never worked on anything healthcare-related, her personal experiences with health insurance claim denials in the US led her to create an open-source tool to automate as much of the appeals process as possible.Karau said that she's "seen different healthcare systems and the trade-offs," and the Canadian version isn't "perfect either." However, she grew increasingly frustrated with the US healthcare system while seeking out trans healthcare in California and recovering from a motorcycle crash.Karau said denied claims lead to "a lot of suffering in the world today," and those challenges led her to start working on the AI project to help dispute health insurance denials."I'm not going to put up with this anymore.