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Stax by Fattmerchant Review

Michael Graw

In a Nutshell

Stax by Fattmerchant is a payments processing service that charges a monthly subscription instead of percentage-based fees. That makes it potentially cheaper than other point-of-sale providers for small businesses with high monthly transaction volumes. The service is easy to use and covers both swiped and keyed-in payments. Stax doesn’t have early termination fees.


  • No percentage-based transaction fees
  • Includes swiped and keyed-in payments
  • 24/7 customer support


  • Software requires an additional monthly subscription
  • Pricing structure is expensive for low-volume businesses

Stax Stax Visit Site

Ideal For

  • Small businesses with high monthly revenue
  • Businesses that use both swiped and keyed-in payments
  • Business owners that want payment and analysis services in one place

What’s on Offer

  • Full-service merchant accounts with Worldpay processing
  • Countertop and mobile card readers
  • Support for both swiped and keyed-in payments
  • Subscription pricing with no percentage-based transaction fees
  • Centralized Stax Pay web platform for managing your accounts
  • Stax API for custom integrations and development
  • 24/7 customer support via online ticketing system

Application Process

To apply for Stax, you’ll need to get in touch with the Fattmerchant sales team. You can request a quote online, and a sales representative will call you, typically within the same business day. This offers an opportunity to find out how many different Stax subscription services you’ll need and your approximate total monthly cost.

If you decide to go ahead with Stax, you’ll need your social security number and business license, as well as details about your business’s monthly sales. You can select what hardware and software tools you want to purchase, and Fattmerchant will ship out any hardware within a few days.

What’s Unique About Stax?

Subscription-based pricing

The most unique thing about Stax is its pricing model. Instead of charging a percentage of every sale your business makes, Stax offers a flat monthly subscription. You pay $99 per month, plus a flat fee per transaction. That means that the service has a built-in volume discount: the more payments your business processes, the more you’ll save relative to processors that charge percentage-based fees.

The basic monthly subscription to Stax includes a wide range of features. For example, you can process both swiped and keyed-in payments with PCI compliance built into the software. In addition, Stax comes with Quickbooks integration and online invoicing.

Stax Pay software

Stax also offers an online dashboard, called Stax Pay, where you can monitor your business’s sales data. This requires an extra monthly subscription, and you can select from three different tiers depending on the services you need.

At the top tier, the software includes advanced analytics that breaks down your sales by location and employee. It also offers a one-click shopping cart for e-commerce, inventory management, support for keeping customers’ credit cards on file, and recurring payments.

To be fair, the inventory management and invoicing features built into Stax Pay are relatively basic. There is no support for barcodes or SKUs, and you have to enter invoice details by hand instead of uploading a spreadsheet. Still, it’s very convenient to have these tools right alongside the rest of Stax’s payment features.

For businesses that need even more control over their payments, Stax Pay also includes a built-in API. The API is well-documented, but it’s not a plug-and-play solution like some other payment processors offer. You’ll likely want to enlist the help of a software developer to make the most of this offering.


One of the things we like best about Stax is that the company is transparent. The terms of service are published right on the Stax website, so you can review them before you start the process of signing up for a plan.

On top of that, all Stax contracts are month-to-month, and there are no early termination fees. You just need to give 30 days’ notice to cancel your subscriptions.

Customer Support

Fattmerchant offers 24/7 customer support for Stax via an online ticketing system. We found that responses typically arrive within a few hours. The Stax website also has a detailed online knowledge base, although this is more focused on explaining the service’s features than on troubleshooting.


Stax offers a standard $99 per month subscription that includes payment processing and some essential features like PCI compliance. There are no percentage-based fees on payments, but you’ll pay $0.08 per swiped payment and $0.15 per keyed-in payment.

Stax Pay requires an additional subscription. The Starter plan costs $49 per month and offers a basic reporting dashboard and support for ACH payments. Stax takes a 1% fee on ACH payments, up to $10. The Growth plan costs $89 per month and adds more analytics tools, API access, and Text2Pay support. The Pro plan costs $129 per month and unlocks all Stax Pay analysis features plus inventory management, a one-click shopping cart, and recurring payments.

Additional Fees
Payment Processing
$99 per month

$0.08 per swiped payment

$0.15 per keyed-in payment

Stax Pay
$49, $89, or $129 per month
1% of ACH payments, up to $10

Stax also offers hardware payment terminals, but pricing varies by the model you want and based on which subscription plans you sign up for. So, you’ll need to request a quote to find out how much a terminal will cost.

Bottom Line

Stax by Fattmerchant can be a good option for small businesses with high monthly revenue. The subscription pricing model and lack of percentage-based transaction fees mean that payment processing costs are consistent over time. Plus, your business effectively receives a discount relative to other payment providers when processing large transactions.

Stax can also be worthwhile for businesses that want analytics, software integrations, and e-commerce on the same platform. The Stax Pay software makes it simple to accept payments in almost any form and to track revenue across your business. Although some of the features are limited relative to purpose-built solutions, there’s a lot to be said for having all of your payment tools together in a single software suite.

About Stax

Stax is offered by Fattmerchant, a Florida-based payments processor founded in 2014. Fattmerchant rebranded itself as Stax in April 2021 and introduced a new pricing structure, new mobile app, and overhauled desktop platform. Stax has processed over $9 billion in payments since its founding and has over 12,000 business customers. 

Stax Stax Visit Site

Physical Address

618 E South St, Suite #510, Orlando, FL 32801

Contact Details

Phone: (833) 782-9729

Michael Graw is a freelance journalist and photographer based in Bellingham, Washington. His work has been published on a wide selection of popular websites, and he has built a solid reputation for his writing in the technology and finance sectors. Michael has a particular interest in new technology and runs a small business where he constantly puts the latest web, business, and consumer tech through its paces.

Stax customer reviews

Based on 15 reviews

Ease of use

Brand satisfaction

Value for money

Service quality

Top Reviews

Ease of use

Brand satisfaction

Value for money

Service quality

5 months ago

I really don't have too much experience with Staxx but from what I've experienced it is a very good processor to use, it's cost-effective, and convenient.

7 months ago

Staxx checks all the boxes. It's easy to use, and their customer service is outstanding. I would definitely recommend it.

8 months ago

Staxx credit card processor is the very best that I have come in touch with. Their customer service is available to help you no matter what.

5 months ago

It is very easy to learn to use. They could offer more options and I would like to be able to add multiple administrators.

5 months ago

Overall it's good, but at times I find the processor takes a longer amount of time than it should to run the card through my machine.

6 months ago

Their customer service is very helpful, and they were able to answer my questions.

7 months ago

It gives you an opportunity to build your credit well. It's an easy app.

8 months ago

They register the card fully for both myself and the client. It accepts most credit card companies.

5 months ago

It does its job effectively. I just wish it didn't have such buggy updates, they ruin the experience.

5 months ago

This program and software is quite easy to understand and install. The system is quite good, although for the value it's not as good as it could be.

6 months ago

I don't really think too much one way or the other about Staxx. I just started to use it and so far I like it.

6 months ago

It was very confusing and impossible to get somebody on the phone. I called for hours and hours. Somebody finally returned our call two days later.

7 months ago

I have always been worried about my credit card protection and this app is amazing.

8 months ago

I need my credit card processor to be ultra fast and I find that Staxx is not the best for my business.

6 months ago

This application was unbelievably horrible. I wish I hadn't even installed it, it was a nightmare to use. I couldn't get anything to work properly, I tried contacting customer service and they did nothing to help.

15 reviews