Flex builds payments infrastructure that allows health and wellness brands to accept HSA (Health Savings Account) and FSA (Flexible Spending Account) payments through their online checkout. The company's technology verifies product eligibility in real time and manages split transactions when a cart contains both eligible and non-eligible items. It can also issue Letters of Medical Necessity during the checkout process, reducing friction for consumers using these pre-tax benefit accounts.
The company operates in a significant market: annual HSA/FSA spending potential is estimated at $150 billion. Its core technical domains include payments infrastructure, real-time verification, and split payments handling. These capabilities address a long-standing gap in e-commerce, where many health and wellness purchases that qualify for HSA/FSA reimbursement have historically required manual claims processes rather than direct payment at checkout.
Flex sits at the intersection of healthcare benefits, e-commerce, and payments technology. The company is headquartered at withflex.com.
