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COMPANY PROFILES
Leading HSA/FSA Payments Infrastructure for Health and Wellness Brands
Overview
Flex is the leading HSA/FSA payments infrastructure for health and wellness brands, helping omnichannel retailers unlock $150B in pre-tax spending. By simplifying complex eligibility and reimbursement rules, Flex powers seamless checkout, supports recurring and mixed-cart payments, boosts AOV, and makes it effortless for consumers to use their pre-tax dollars.
To learn more, visit www.withflex.com
Contact
USA
Region Served
7
Years in Market
Hundreds
Clients Served
1,200,000
Active Members
Biggest
Achievements of 2025
01
Launched universal HSA/FSA integrations across Shopify, WooCommerce, and custom APIs, making pre-tax payment acceptance accessible to merchants of all sizes and removing long-standing technical barriers.
02
Raised a $15M Series A to accelerate product expansion amid rapid adoption from enterprise health and wellness brands.
This year made one thing clear: consumers want to use their HSA/FSA dollars on products that genuinely improve their health and daily lives and Flex is making that possible. Most retailers still aren’t set up to accept these funds, but we saw massive demand from both sides of the market. The growth reinforced a simple lesson: when you remove complexity, everyone wins. Merchants unlock new revenue, and consumers finally get to use money they already have. What excites me most about the year ahead is the momentum. We’re just scratching the surface of what accessible, health-focused payments can enable.
Sam O’Keefe
Co-Founder & CEO,
Flex
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