HSA/FSA Platform
HSA/FSA Platform
An HSA/FSA Platform, Built for Every Stack
An HSA/FSA Platform, Built for Every Stack
An HSA/FSA Platform, Built for Every Stack
Flex integrates seamlessly across platforms like Shopify, Shopline, Stripe, and API, enabling any merchant to accept HSA/FSA payments their way.
Flex integrates seamlessly across platforms like Shopify, Shopline, Stripe, and API, enabling any merchant to accept HSA/FSA payments their way.
Flex integrates seamlessly across platforms like Shopify, Shopline, Stripe, and API, enabling any merchant to accept HSA/FSA payments their way.
Conversion Lift
+30%
More shoppers complete checkout with HSA/FSA
Conversion Lift
+30%
More shoppers complete checkout with HSA/FSA
Conversion Lift
+30%
More shoppers complete checkout with HSA/FSA
Conversion Lift
+30%
More shoppers complete checkout with HSA/FSA
AOV LIFT
+50%
Customers spend more using health benefit funds
AOV LIFT
+50%
Customers spend more using health benefit funds
AOV LIFT
+50%
Customers spend more using health benefit funds
AOV LIFT
+50%
Customers spend more using health benefit funds
Fewer Returns
-10%
Fewer returns when buyers use pre-tax dollars
Fewer Returns
-10%
Fewer returns when buyers use pre-tax dollars
Fewer Returns
-10%
Fewer returns when buyers use pre-tax dollars
Fewer Returns
-10%
Fewer returns when buyers use pre-tax dollars
Repeat Buyers
+92%
Of surveyed customers said they'll return because of HSA/FSA
Repeat Buyers
+92%
Of surveyed customers said they'll return because of HSA/FSA
Repeat Buyers
+92%
Of surveyed customers said they'll return because of HSA/FSA
Repeat Buyers
+92%
Of surveyed customers said they'll return because of HSA/FSA
Benefits
Benefits
Flex embeds HSA/FSA functionality into your existing platform
Integrate HSA/FSA payments into any tech stack
Plug-and-play support for Shopify, Shopline, Stripe, and APIs lets you add HSA/FSA payments without reworking your checkout.
Integrate HSA/FSA payments into any tech stack
Plug-and-play support for Shopify, Shopline, Stripe, and APIs lets you add HSA/FSA payments without reworking your checkout.
Integrate HSA/FSA payments into any tech stack
Plug-and-play support for Shopify, Shopline, Stripe, and APIs lets you add HSA/FSA payments without reworking your checkout.
Scale confidently with enterprise-grade performance
Built for high-volume throughput, recurring billing, and reliable uptime so HSA/FSA payments work seamlessly as you grow.
Scale confidently with enterprise-grade performance
Built for high-volume throughput, recurring billing, and reliable uptime so HSA/FSA payments work seamlessly as you grow.
Scale confidently with enterprise-grade performance
Built for high-volume throughput, recurring billing, and reliable uptime so HSA/FSA payments work seamlessly as you grow.
Maintain a fully on-brand payment experience
Flexible implementation options allow you to customize the checkout flow and keep every customer touchpoint consistent with your brand.
Maintain a fully on-brand payment experience
Flexible implementation options allow you to customize the checkout flow and keep every customer touchpoint consistent with your brand.
Maintain a fully on-brand payment experience
Flexible implementation options allow you to customize the checkout flow and keep every customer touchpoint consistent with your brand.
Accelerate adoption with co-marketing and proven HSA/FSA playbooks
Joint promotional opportunities with Flex help you reach our audience of HSA/FSA customers, supported by marketing guides and best practices.
Accelerate adoption with co-marketing and proven HSA/FSA playbooks
Joint promotional opportunities with Flex help you reach our audience of HSA/FSA customers, supported by marketing guides and best practices.
Accelerate adoption with co-marketing and proven HSA/FSA playbooks
Joint promotional opportunities with Flex help you reach our audience of HSA/FSA customers, supported by marketing guides and best practices.
Features
Features
An FSA/HSA Platform Ready To Scale With Your Existing Checkout
Flex’s FSA/HSA platform has everything you need to power FSA/HSA payments your way. It integrates fully into your existing ecommerce stack maintaining brand, it offers options to pay with HSA/FSA cards right at checkout, and provides Letters of Medical Necessity in checkout flow to reduce customer dropoff.
Integration Options
Integration Options
Flexible integration for every type of merchant
Flex adapts to any checkout flow—whether you’re on Shopify, Shopline, Stripe, WooCommerce, or building on a custom stack—so you can enable HSA/FSA payments without rewriting your architecture.
Integration Options
Flexible integration methods that support both SMBs and enterprise-grade architectures, via API, Shopify, Shopline, WooCommerce, RevenueCat, and Payment Links.
Integration Options
Flexible integration methods that support both SMBs and enterprise-grade architectures, via API, Shopify, Shopline, WooCommerce, RevenueCat, and Payment Links.
Integration Options
Flexible integration methods that support both SMBs and enterprise-grade architectures, via API, Shopify, Shopline, WooCommerce, RevenueCat, and Payment Links.
Integration Options
Flexible integration methods that support both SMBs and enterprise-grade architectures, via API, Shopify, Shopline, WooCommerce, RevenueCat, and Payment Links.
Custom checkout branding
Enables merchants to fully brand the HSA/FSA checkout experience for a seamless, on-brand journey.
Custom checkout branding
Enables merchants to fully brand the HSA/FSA checkout experience for a seamless, on-brand journey.
Custom checkout branding
Enables merchants to fully brand the HSA/FSA checkout experience for a seamless, on-brand journey.
Custom checkout branding
Enables merchants to fully brand the HSA/FSA checkout experience for a seamless, on-brand journey.
Marketing & Adoption
Marketing & Adoption
Grow your HSA/FSA channel with built-in marketing support
From co-marketing to proven playbooks, Flex gives you the resources and promotional tools you need to drive awareness, adoption, and repeat HSA/FSA spend.
Marketing Guide
Pre-built campaigns, templates, and promotional assets to drive HSA/FSA awareness and adoption.
Marketing Guide
Pre-built campaigns, templates, and promotional assets to drive HSA/FSA awareness and adoption.
Marketing Guide
Pre-built campaigns, templates, and promotional assets to drive HSA/FSA awareness and adoption.
Marketing Guide
Pre-built campaigns, templates, and promotional assets to drive HSA/FSA awareness and adoption.
Co-Marketing Support
Joint promotional opportunities with Flex to help drive awareness, traffic, and adoption across customer segments.
Co-Marketing Support
Joint promotional opportunities with Flex to help drive awareness, traffic, and adoption across customer segments.
Co-Marketing Support
Joint promotional opportunities with Flex to help drive awareness, traffic, and adoption across customer segments.
Co-Marketing Support
Joint promotional opportunities with Flex to help drive awareness, traffic, and adoption across customer segments.
Testimonials
Testimonials
Why brands love Flex
“The integration was smooth from start to finish. The Flex team was incredibly responsive and supportive, and their marketing guides helped us optimize the experience from day one.”
Emillee Simon
Senior Manager of E-Commerce, Kindred Bravely
“The integration was smooth from start to finish. The Flex team was incredibly responsive and supportive, and their marketing guides helped us optimize the experience from day one.”
Emillee Simon
Senior Manager of E-Commerce, Kindred Bravely
“The integration was smooth from start to finish. The Flex team was incredibly responsive and supportive, and their marketing guides helped us optimize the experience from day one.”
Emillee Simon
Senior Manager of E-Commerce, Kindred Bravely
"Setup was quick and painless. Giving customers another option, especially given our higher average order value, makes our product more accessible to people who might not otherwise have had the funds to buy."
Alex Burcham
Marketing Manager, Chilipad
"Setup was quick and painless. Giving customers another option, especially given our higher average order value, makes our product more accessible to people who might not otherwise have had the funds to buy."
Alex Burcham
Marketing Manager, Chilipad
"Setup was quick and painless. Giving customers another option, especially given our higher average order value, makes our product more accessible to people who might not otherwise have had the funds to buy."
Alex Burcham
Marketing Manager, Chilipad
“The marketing materials Flex provided were phenomenal. We used their landing page and email examples as inspiration, layered in our branding, and saw campaigns perform better than almost anything else.”
Paige Smith
Head of Brand Marketing, AMMD by Amy Myers MD
“The marketing materials Flex provided were phenomenal. We used their landing page and email examples as inspiration, layered in our branding, and saw campaigns perform better than almost anything else.”
Paige Smith
Head of Brand Marketing, AMMD by Amy Myers MD
“The marketing materials Flex provided were phenomenal. We used their landing page and email examples as inspiration, layered in our branding, and saw campaigns perform better than almost anything else.”
Paige Smith
Head of Brand Marketing, AMMD by Amy Myers MD
“Absolutely, I’d recommend Flex. It’s a user-friendly platform backed by an amazing, knowledgeable team. They make a complex process — both technically and financially — feel easy. And the results speak for themselves.”
Harry Yu
Senior Brand & Partnerships Manager, Airdog
“Absolutely, I’d recommend Flex. It’s a user-friendly platform backed by an amazing, knowledgeable team. They make a complex process — both technically and financially — feel easy. And the results speak for themselves.”
Harry Yu
Senior Brand & Partnerships Manager, Airdog
“Absolutely, I’d recommend Flex. It’s a user-friendly platform backed by an amazing, knowledgeable team. They make a complex process — both technically and financially — feel easy. And the results speak for themselves.”
Harry Yu
Senior Brand & Partnerships Manager, Airdog
"The Flex integration through RevenueCat made it simple for Ladder to offer subscriptions via HSA and FSA cards — a major unlock for our users and an effective new growth lever. "
Ryan Mott
VP of Data Product at Ladder
"The Flex integration through RevenueCat made it simple for Ladder to offer subscriptions via HSA and FSA cards — a major unlock for our users and an effective new growth lever. "
Ryan Mott
VP of Data Product at Ladder
"The Flex integration through RevenueCat made it simple for Ladder to offer subscriptions via HSA and FSA cards — a major unlock for our users and an effective new growth lever. "
Ryan Mott
VP of Data Product at Ladder
“The integration was smooth from start to finish. The Flex team was incredibly responsive and supportive, and their marketing guides helped us optimize the experience from day one.”
Emillee Simon
Senior Manager of E-Commerce, Kindred Bravely
"Setup was quick and painless. Giving customers another option, especially given our higher average order value, makes our product more accessible to people who might not otherwise have had the funds to buy."
Alex Burcham
Marketing Manager, Chilipad
“The marketing materials Flex provided were phenomenal. We used their landing page and email examples as inspiration, layered in our branding, and saw campaigns perform better than almost anything else.”
Paige Smith
Head of Brand Marketing, AMMD by Amy Myers MD
“Absolutely, I’d recommend Flex. It’s a user-friendly platform backed by an amazing, knowledgeable team. They make a complex process — both technically and financially — feel easy. And the results speak for themselves.”
Harry Yu
Senior Brand & Partnerships Manager, Airdog
"The Flex integration through RevenueCat made it simple for Ladder to offer subscriptions via HSA and FSA cards — a major unlock for our users and an effective new growth lever. "
Ryan Mott
VP of Data Product at Ladder