Stax review

Its subscription-based pricing is best suited to businesses that process over $10,000 monthly.

Stax — formerly known as Fattmerchant — offers a comprehensive sweep of services that includes dedicated merchant accounts, point-of-sale (POS) systems and tools for developers. But while it offers markup-free processing rates, its subscription-based pricing model may not be a good fit for smaller businesses.

  • Choose this provider if you run a business that processes more than $10,000 monthly.
  • Consider something else if you run an online business and don’t need in-person processing support.
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SolutionsIn-store, Mobile, Online
ProductsPayment processing, POS software, Inventory tracking
Monthly fees start at$99/month
Processing fees start at$0.08 + interchange per transaction
Contract required?No
Processing timeNext day for qualified businesses
High-risk merchants accepted?No

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Best of 2021
Finder experts pick Stax as a 2021 best brand for payment processing.

Stax services

This Orlando-based processor offers a comprehensive suite of services:

  • Payment processing. Stax's subscription-based processing model comes with flat monthly fees and markup-free interchange rates.
  • Merchant account. Onboarded businesses receive a dedicated merchant account from this direct provider.
  • POS software. Stax's software packages come with a virtual terminal, reporting, invoicing and inventory management features.
  • POS hardware. Dejavoo terminals and BBPOS mobile card readers allow you to accept swiped, dipped and tapped payments.
  • Virtual terminal. Included in Stax software packages is access to a virtual terminal for sending invoices and collecting online payments.
  • Shopping cart. Sign up for Stax's shopping cart add-on to offer customers the complete checkout process without ever leaving your website.


Stax's feature set comes with many of the standards you’d expect:

  • Mobile payments. Accept and process mobile payments with a card reader and Stax's app for Android and iOS.
  • Invoicing. Customize invoices, send payment reminders and set up recurring payments.
  • Inventory management. Track inventory with low stock alerts, item categories, tax rates and set discounts.
  • Developer suite. Tap into a full Javascript library, complete with Android and iOS SDKs and Stax's RESTful API.
  • Analytics. Compare sales trends across business locations and time of day along with custom reports reviewing payment history, inventory levels, item categories and deposits.

What hardware is available?

Process payments in-store, online or from a mobile device with a Dejavoo terminal or BBPOS mobile card reader.

Pricing and fees

Stax uses a subscription-based pricing model. This means merchants pay rates per transaction, plus a flat monthly fee to access Stax's core processing features. Interchange rates vary by card issuer and transaction type, but typically range between 0.05% and 2.7%, plus $0.05 to $0.22 for each transaction.

Some of Stax's services cost extra. Its software packages cost an added $49 to $129 monthly. And other features, like its shopping cart integration, QuickBooks Online Pro Sync, custom branding and more, are offered on an à la carte basis.

Stax Pay

Stax's primary service tier includes payment processing, customizable digital invoicing, recurring billing, payment requests, an online shopping cart, reporting analytics, customer management features and more.

  • Subscription fee. $99 monthly
  • Swiped payments. $0.08 + interchange for each transaction
  • Keyed payments. $0.15 + interchange for each transaction

Stax Enterprise — over $5 million annually

The Enterprise service tier includes pricing packages that are customized to each business, with priority tech support included.

Stax Connect — SaaS platforms

Stax Connect is a processing package tailored for software companies. Pricing isn't publicly available, so you'll need to contact a Stax rep for a personalized quote.

Crunching the numbers: When is Stax's subscription worth it?

It can be hard to compare prices when there are so many different ways companies charge for payment processing. To break it down, let’s look at the cost for a few businesses to use Stax and Square. We chose to compare Square, a popular option for small businesses with a middle-of-the-road, flat-rate processing fee.

In this example, we assume that each business processes a mix of credit and debit cards with an average interchange rate of 1.7%, and that all payments are either swiped, tapped or dipped — no keyed-in transactions. If a business processes more debit than credit cards, the price for Stax would be lower, but the price for Square would be the same.

Seafood restaurant: $10,000/month
Trophy icon Winner: Square

Catering business: $25,000/month
Trophy icon Winner: Stax

Retail boutique: $50,000/month
Trophy icon Winner: Stax

Marketing company: $100,000/month
Trophy icon Winner: Stax

For businesses processing less than $10,000 per month, it’s usually cheaper to choose a flat-rate processor like Square or Chase Merchant Services. But for businesses that process more than $10,000 per month, Stax may be a better option. And the more you process, the more you can save by choosing a subscription-based processor.

Stax software packages

Stax software packages are designed to augment Stax’s core payment processing service with added features and perks.


$49 monthly

$89 monthly

$129 monthly


  • Basic reporting and analytics dashboard
  • 1% of ACH transactions up to $10
  • 24/7 ticket-based support

Everything from the Starter tier, plus:

  • Average sales and refund reports
  • Month-to-month growth monitoring
  • Invoicing
  • Text2Pay
  • Web-hosted payments
  • Accounting tools
  • API key

Everything from the Growth tier, plus:

  • Multi-location reporting
  • Company overviews
  • Sales activity heatmaps
  • Shopping cart catalog management
  • Recurring and scheduled payments
  • Data exports
  • Dedicated account manager

Pros and cons


  • Markup-free interchange. Unlike many of its competitors, Stax doesn’t pad its processing fees with markup, offering transparent wholesale rates so you know exactly what you pay per transaction.
  • No cancellation fees. You can leave at any time without penalty.
  • Integrations. Stax boasts a variety of popular e-commerce and accounting integrations, including QuickBooks, WooCommerce and Shopify.
  • 24/7 support. Take advantage of round-the-clock tech support through Stax's ticketing system.


  • Expensive for some businesses. Stax processing starts at $99 monthly, plus processing fees with additional costs to access its software packages. If you process less than $10,000 per month, you may pay less with a provider that charges flat rates.
  • Limited hardware options. While it’s possible to bring your own hardware, your terminal options are limited to the Dejavoo products that Stax integrates with.

Stax reviews and complaints

As of May 2021, Stax is a well-reviewed provider. Its an accredited business with the Better Business Bureau (BBB) with an A+ rating and a total of 28 complaints to its name over the past three years. It has a TrustScore of 4.4 out of 5 based on 552 reviews: an "Excellent" rating in Trustpilot's books.

Customers speak well of Stax's courteous customer service reps and competitive card processing rates. Although complaints of this provider are rare, several customers expressed disappointment with Stax's steep monthly subscription fee.

How do I open an account with Stax?

To start the signup process, you’ll need to get in touch with a Stax rep:

  1. On Stax's website, select Get Started.
  2. Enter your full name, email address, phone number, company name, company type and industry.
  3. Select Submit & Get Started.

What other products will I need?

When you sign up with Stax, you’ll be asked to provide details for the following:

  • Checking account. You need a business checking account before you can begin accepting payments.

What is Stax?

Stax — formerly Fattmerchant — was founded in 2012 by Suneera Madhani in Orlando, Florida. With her guidance, the company evolved from a single-person operation to a team of over 100 people, raising $20 million in venture capital along the way. Today, Stax acts as the payment processor for thousands of businesses across the US.

How do I contact Stax support?

Stax support is available by:

  • Phone. Call 855-550-3288 weekdays from 8:30 a.m. to 5:30 p.m. EST.
  • Email. Fill out a secure online form on Stax's website for an email response from the customer support team.
  • Live chat. Chat with a member of the Stax team weekdays from 8:30 a.m. to 5:30 p.m. EST.

Compare other payment processors

If Stax doesn't offer the features you're looking for, compare your other payment processing options by features and fees to find the processor best suited to your business' needs.

Name Product Monthly fees start at Processing fees start at Processing time High-risk merchants accepted?
Chase Merchant Services
Chase Merchant Services
2.6% + 10¢ per swiped credit card
Next day when you deposit into a Chase business checking account
Accept, process and deposit customer payments in your store, online or on-the-go.
$0.08 + interchange per transaction
Next day for qualified businesses
Businesses that process more than $10,000 monthly can save with Stax's interchange+ pricing.
2.6% + 10¢
Next day
Square is a one-stop shop with both e-commerce and in-person solutions.
1.92% + $0.08 per transaction
Two business days
Conveniently packaged into three service tiers for in-person and online sales.
Payline Data
Payline Data
0.2% + interchange + $0.10 per transaction
Next day
Accepts high-risk merchants and offers discounted rates for nonprofits.

Compare up to 4 providers

Bottom line

Stax is a solid choice for big businesses that can take advantage of its subscription-based pricing structure. But the high cost of entry and pricey add-ons for additional software features may hurt startups and seasonal merchants.

Still weighing your options? Check out what other payment providers have to offer before you make a decision.

Frequently asked questions

What software does Stax integrate with?

Stax integrates with the following platforms:

  • Aloha
  • Lavu
  • Oracle Micros
  • Quetzal
  • Revel Systems
  • Shopify
  • ShopKeep
  • Vend
  • WooCommerce

For a full list of integrations, reach out to a Stax rep.

Is Stax available outside the US?

No, Stax is only available to US merchants.

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