For Business

For Shoppers

For Business

For Shoppers

For Business

For Shoppers

Make HSA/FSA payments your next revenue driver

Make HSA/FSA payments your next revenue driver

Make HSA/FSA payments your next revenue driver

Make HSA/FSA payments your next revenue driver

Increase AOV by 50% and checkout conversion by 30% with the only HSA/FSA payments infrastructure built for top health and wellness brands.

Maximize Your Checkout

Maximize Your Checkout

Maximize Your Checkout

Maximize Your Checkout

Flex Supply Co.

HSA/FSA Revenue

+30.5%

$1,250,000

Trending up this month

Average Order Value

+45%

$358.00

AOV growth is on track

Conversion Rate

+12.5%

85%

Steady performance increase

Net Revenue

Total for the last 3 months

Jan 1

Jan 15

Feb 1

Feb 15

Mar 1

Mar 15

AOV

Total for the last 3 months

Jan 1

Jan 15

Feb 1

Feb 15

Mar 1

Mar 15

Top Products

Total for the last 3 months

Fitness Equipment

4,103

Skincare

2,539

Eye Glasses

1,258

Footwear

950

Top Customers

Total for the last 3 months

Sam O’Keefe

10

Miguel Toledo

9

Connor Olsen

8

Nick Holland

6

Test Mode

Transform checkout. Drive more revenue.

Transform checkout. Drive more revenue.

Transform checkout. Drive more revenue.

Transform checkout. Drive more revenue.

See what leading brands achieve with Flex HSA/FSA payments:

See what leading brands achieve with Flex HSA/FSA payments:

See what leading brands achieve with Flex HSA/FSA payments:

CONVERSION LIFT

CONVERSION LIFT

+30%

+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

HIGHER AOV

HIGHER AOV

+50%

+50%

Customers spend more using health benefit funds

HIGHER AOV

+50%

Customers spend more using health benefit funds

HIGHER AOV

+50%

Customers spend more using health benefit funds

FEWER RETURNS

FEWER RETURNS

-10%

-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

REPEAT BUYERS

92%

92%

Of customers said they'll return because of HSA/FSA

REPEAT BUYERS

92%

Of customers said they'll return because of HSA/FSA

REPEAT BUYERS

92%

Of customers said they'll return because of HSA/FSA

Your all-in-one HSA/FSA payments infrastructure

Your all-in-one HSA/FSA payments infrastructure

Your all-in-one HSA/FSA payments infrastructure

Your all-in-one HSA/FSA payments infrastructure

Everything you need to accept benefits payments and support complex enterprise operations at scale.

Everything you need to accept benefits payments and support complex enterprise operations at scale.

Everything you need to accept benefits payments and support complex enterprise operations at scale.

Effortless HSA/FSA Payments

Enable seamless HSA/FSA payments in-app or on your website. We handle the complexity of split cards, subscriptions, and more.

Autopilot Compliance

Automatically verify HSA/FSA eligibility before and after your customers purchase. We automatically generate a Letter of Medical Necessity if required to stay in compliance.

Smarter Insights

Access powerful dashboards and insights to identify your customers' spending trends and generate more revenue.

Flexible integration for modern e-commerce

curl --request POST \

--url https://api.withflex.com/v1/checkout/sessions \

--header 'Authorization: Bearer ' \

--header 'Content-Type: application/json' \

--data '{

"checkout_session": {

"allow_promotion_codes": true,

"line_items": [

{

"price": "",

"price_data": {

"description": "",

"product": "",

"unit_amount": 1,

"recurring": {

"interval": "daily",

"interval_count": 1,

"trial_period_days": 1

},

"metadata": {}

},

"quantity": 123,


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API-first and fully customizable

Flex integrates seamlessly with your tech stack. From custom checkouts to Shopify, our HSA/FSA payments infrastructure adapts to how you sell.

Speak with a Specialist

Built for enterprise scale

Support complex business models, including subscriptions, high-volume transactions, and recurring payments. Flex is designed for the demands of large brands.

Fast, reliable implementation

Get up and running quickly with clear documentation, dedicated support, and proven reliability—even during peak sales periods.

Explore How Flex Fits Your Tech Stack

Integrates with any
checkout or payment system

  • Shopify
  • WooCommerce
  • RevenueCat
  • Kintsugi
  • Shopline

Flexible integration for modern e-commerce

curl --request POST \

--url https://api.withflex.com/v1/checkout/sessions \

--header 'Authorization: Bearer ' \

--header 'Content-Type: application/json' \

--data '{

"checkout_session": {

"allow_promotion_codes": true,

"line_items": [

{

"price": "",

"price_data": {

"description": "",

"product": "",

"unit_amount": 1,

"recurring": {

"interval": "daily",

"interval_count": 1,

"trial_period_days": 1

},

"metadata": {}

},

"quantity": 123,


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API-first and fully customizable

Flex integrates seamlessly with your tech stack. From custom checkouts to Shopify, our HSA/FSA payments infrastructure adapts to how you sell.

Speak with a Specialist

Built for enterprise scale

Support complex business models, including subscriptions, high-volume transactions, and recurring payments. Flex is designed for the demands of large brands.

Fast, reliable implementation

Get up and running quickly with clear documentation, dedicated support, and proven reliability—even during peak sales periods.

Explore How Flex Fits Your Tech Stack

Integrates with any
checkout or payment system

  • Shopify
  • WooCommerce
  • RevenueCat
  • Kintsugi
  • Shopline

Flexible integration for modern e-commerce

curl --request POST \

--url https://api.withflex.com/v1/checkout/sessions \

--header 'Authorization: Bearer ' \

--header 'Content-Type: application/json' \

--data '{

"checkout_session": {

"allow_promotion_codes": true,

"line_items": [

{

"price": "",

"price_data": {

"description": "",

"product": "",

"unit_amount": 1,

"recurring": {

"interval": "daily",

"interval_count": 1,

"trial_period_days": 1

},

"metadata": {}

},

"quantity": 123,


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16

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19

20

21

22

API-first and fully customizable

Flex integrates seamlessly with your tech stack. From custom checkouts to Shopify, our HSA/FSA payments infrastructure adapts to how you sell.

Speak with a Specialist

Built for enterprise scale

Support complex business models, including subscriptions, high-volume transactions, and recurring payments. Flex is designed for the demands of large brands.

Fast, reliable implementation

Get up and running quickly with clear documentation, dedicated support, and proven reliability—even during peak sales periods.

Explore How Flex Fits Your Tech Stack

Integrates with any
checkout or payment system

  • Shopify
  • WooCommerce
  • RevenueCat
  • Kintsugi
  • Shopline

Flexible integration for modern e-commerce

curl --request POST \

--url https://api.withflex.com/v1/checkout/sessions \

--header 'Authorization: Bearer ' \

--header 'Content-Type: application/json' \

--data '{

"checkout_session": {

"allow_promotion_codes": true,

"line_items": [

{

"price": "",

"price_data": {

"description": "",

"product": "",

"unit_amount": 1,

"recurring": {

"interval": "daily",

"interval_count": 1,

"trial_period_days": 1

},

"metadata": {}

},

"quantity": 123,


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5

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16

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20

21

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API-first and fully customizable

Flex integrates seamlessly with your tech stack. From custom checkouts to Shopify, our HSA/FSA payments infrastructure adapts to how you sell.

Speak with a Specialist

Built for enterprise scale

Support complex business models, including subscriptions, high-volume transactions, and recurring payments. Flex is designed for the demands of large brands.

Fast, reliable implementation

Get up and running quickly with clear documentation, dedicated support, and proven reliability—even during peak sales periods.

Explore How Flex Fits Your Tech Stack

Integrates with any checkout or payment system

  • Shopify
  • WooCommerce
  • RevenueCat
  • Kintsugi
  • Shopline

Flexible integration for modern e-commerce

curl --request POST \

--url https://api.withflex.com/v1/checkout/sessions \

--header 'Authorization: Bearer ' \

--header 'Content-Type: application/json' \

--data '{

"checkout_session": {

"allow_promotion_codes": true,

"line_items": [

{

"price": "",

"price_data": {

"description": "",

"product": "",

"unit_amount": 1,

"recurring": {

"interval": "daily",

"interval_count": 1,

"trial_period_days": 1

},

"metadata": {}

},

"quantity": 123,


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5

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16

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19

20

21

22

API-first and fully customizable

Flex integrates seamlessly with your tech stack. From custom checkouts to Shopify, our HSA/FSA payments infrastructure adapts to how you sell.

Speak with a Specialist

Built for enterprise scale

Support complex business models, including subscriptions, high-volume transactions, and recurring payments. Flex is designed for the demands of large brands.

Fast, reliable implementation

Get up and running quickly with clear documentation, dedicated support, and proven reliability—even during peak sales periods.

Explore How Flex Fits Your Tech Stack

Integrates with any checkout or payment system

  • Shopify
  • WooCommerce
  • RevenueCat
  • Kintsugi
  • Shopline

Why brands bet on Flex

We chose Flex because it offers the most comprehensive solution for enabling HSA/FSA payments.

Lisa Thorson

Director Regulatory Affairs

Our partnership with Flex helps make holistic wellness more accessible to everyone.

Natasha Trindall

General Manager

Flex empowers our customers to invest in fitness using their HSA/FSA funds.

Michael Maas

Chief Sales Officer

Flex improved our conversion rate and added trust at checkout.

Raechelle Hoki

VP of Marketing

Flex helps make cutting-edge fitness more affordable and accessible.

Ulrich Dempfle

Co-founder

Flex helps make cutting-edge fitness more affordable and accessible.

Forrest Smith

CEO and Co-founder

Why brands bet on Flex

We chose Flex because it offers the most comprehensive solution for enabling HSA/FSA payments.

Lisa Thorson

Director Regulatory Affairs

Our partnership with Flex helps make holistic wellness more accessible to everyone.

Natasha Trindall

General Manager

Flex empowers our customers to invest in fitness using their HSA/FSA funds.

Michael Maas

Chief Sales Officer

Flex improved our conversion rate and added trust at checkout.

Raechelle Hoki

VP of Marketing

Flex helps make cutting-edge fitness more affordable and accessible.

Ulrich Dempfle

Co-founder

Flex helps make cutting-edge fitness more affordable and accessible.

Forrest Smith

CEO and Co-founder

Why brands bet on Flex

Why brands bet on Flex

Why brands bet on Flex

We chose Flex because it offers the most comprehensive solution for enabling HSA/FSA payments.

Lisa Thorson

Director Regulatory Affairs

Our partnership with Flex helps make holistic wellness more accessible to everyone.

Natasha Trindall

General Manager

Flex empowers our customers to invest in fitness using their HSA/FSA funds.

Michael Maas

Chief Sales Officer

Flex improved our conversion rate and added trust at checkout.

Raechelle Hoki

VP of Marketing

Flex helps make cutting-edge fitness more affordable and accessible.

Ulrich Dempfle

Co-founder

Flex helps make cutting-edge fitness more affordable and accessible.

Forrest Smith

CEO and Co-founder

We chose Flex because it offers the most comprehensive solution for enabling HSA/FSA payments.

Lisa Thorson

Director Regulatory Affairs

Our partnership with Flex helps make holistic wellness more accessible to everyone.

Natasha Trindall

General Manager

Flex empowers our customers to invest in fitness using their HSA/FSA funds.

Michael Maas

Chief Sales Officer

Flex improved our conversion rate and added trust at checkout.

Raechelle Hoki

VP of Marketing

Flex helps make cutting-edge fitness more affordable and accessible.

Ulrich Dempfle

Co-founder

Flex helps make cutting-edge fitness more affordable and accessible.

Forrest Smith

CEO and Co-founder

We chose Flex because it offers the most comprehensive solution for enabling HSA/FSA payments.

Lisa Thorson

Director Regulatory Affairs

Our partnership with Flex helps make holistic wellness more accessible to everyone.

Natasha Trindall

General Manager

Flex empowers our customers to invest in fitness using their HSA/FSA funds.

Michael Maas

Chief Sales Officer

Flex improved our conversion rate and added trust at checkout.

Raechelle Hoki

VP of Marketing

Flex helps make cutting-edge fitness more affordable and accessible.

Ulrich Dempfle

Co-founder

Flex helps make cutting-edge fitness more affordable and accessible.

Forrest Smith

CEO and Co-founder

Flexible at scale, precise by design across industries

Flexible at scale, precise by design across industries

Flexible at scale, precise by design across industries

Flexible at scale, precise by design across industries

Flex takes care the details so you can get set up quickly and compliantly, with personalized support to meet your enterprise needs.

Fitness
Wellness
Home
Skincare
Supplements
Footwear

Latest news & insights

Latest news & insights

Latest news & insights

Latest news & insights

SPEAK WITH A FLEX EXPERT TO

SPEAK WITH A FLEX EXPERT TO

SPEAK WITH A FLEX EXPERT TO

SPEAK WITH A FLEX EXPERT TO

Start accepting HSA/FSA
payments to drive more revenue

Start accepting HSA/FSA
payments to drive more revenue

Start accepting HSA/FSA
payments to drive more revenue

Start accepting HSA/FSA
payments to drive more revenue

Identify if you need payments or reimbursements

See how Flex looks in your checkout flow

Easily integrate Flex with no changes to your stack

Book a Demo

Book a Demo

Book a Demo

Book a Demo