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What is Stax?
Fattmerchant is a cloud-based accounting solution suitable for businesses of all sizes across industries such as e-commerce, healthcare and retail. Key features of the solution include point of sale integration, mobile processing, online invoicing, virtual terminals and developer API.
The solution allows users to accept swiped, dipped, tapped and keyed-in payments. Users can set up tipping options and personalize receipts with a company logo. Fattmerchant also allows users to send one-time invoices, create invoice schedules and redirect customers to a hosted payment page. Payment methods and banking information can be stored to enable recurring payments. A customized payment flow can be created with additional integrations such as QuickBooks Online.
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Our advisors have recommended this software 14 times in the last 30 days.
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4.6
20 Reviews
Ease-of-use
out of 5Customer Support
out of 5Value for money
out of 5Functionality
out of 5"Easy to use, intuitive, and comprehensive with information that matters to you. The thing I like the most about it is the ability to send customers a link to pay there invoice to there phone or email."
"The customer service has been very good but has been slipping the last few years. I referred about 4 other local businesses in my area to Fattmerchant over the years."
"The costs are good and the billing is straightforward."
"I wouldn't even need to be able to see the entire number, but if it could just collect it to be charged in the future."
"Right now the only way I have to collect a card number is either have the customer pay the first invoice, or have them call me and collect it over the phone, which I don't like."
"Seeing an audit trail of whether or not an invoice was sent can be difficult."
Read user reviews
Which features does Stax offer?
Core features:
ACH Payment ProcessingAlerts/NotificationsAPIBarcode / Ticket ScanningBilling & InvoicingBilling PortalCheck ProcessingContact DatabaseContactless NFCCredit Card ManagementShow more features +
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How easy is Stax to use and deploy?
Stax supports multiple deployment options, including: Cloud, SaaS, Web-based, iPhone, iPad, Android, Windows, Mac.
4.6/5 out of 20 Reviews
Showing 1 - 5 of 20 reviews

Matt
Verified reviewer
Company size: 11-50 employees
Industry: Marketing and Advertising
Time used: Less than 12 months
Review Source: Capterra
This reviewer was invited by us to submit an honest review and offered a nominal incentive as a thank you.
December 2019
We save $1,000's on fees with FattMerchant
Their support is great. I've had dozens of questions and they always get back to me. And they send your payments super fast. Great experience overall.
Pros
Flat rate pricing! Oh man, this is a breath of fresh air. After using stripe and square to process payments we have absolutely loved the simplified pricing structure that Fattmerchant uses. Only paying interchange fees and a fixed monthly rate saves us $100's each month.
Cons
The integrations are weak. We've had to build a few workarounds to get fattmerchant to work with our tech stack but it's been worth it.
Reasons for switching to Stax
Pricing and better customer service. It's nice to work with real humans.
William
Company size: 11-50 employees
Industry: Hospitality
Time used: More than 2 years
Review Source: Capterra
This reviewer was invited by us to submit an honest review and offered a nominal incentive as a thank you.
February 2021
The price is good but it has been a change for me now that they are getting more popular.
It started out as a pleasant surprise but the last year has not been as good. Their business is expanding at a serious pace and they are adding features for the price increases but I do not find value for me or my business in the new features.
Pros
The costs are good and the billing is straightforward. The customer service has been very good but has been slipping the last few years. I referred about 4 other local businesses in my area to Fattmerchant over the years.
Cons
The price keeps going up and I am a 4-month seasonal hospitality business that has been seriously affected by the pandemic. I also know that all prices go up, however, I was told in the beginning that I was in early for their company and my price would stay the same. Whether or not that was a sales tactic so I would give them a chance 5 years ago I do not know. I remembered that statement. A few months ago I got blindsighted with a big increase in my monthly cost. They are working on it but it is 3 months and it is still not resolved. It still is a low-cost merchant provider compared to others but I have a regional restaurant buying club alternative that has been begging me to give them a chance so I may because of this issue.
Reasons for choosing Stax
The cost and the phone support was very good during the signup process. I also had an issue within the first few weeks and they straightened it out immediately which made me give them a longer chance. It has been 5 years with them.
Rebecca
Company size: 51-200 employees
Industry: Aviation & Aerospace
Time used: Less than 6 months
Review Source: Capterra
This review was submitted organically. No incentive was offered
February 2019
New User
Overall it has been a great experience and is making our credit card processing easier than our previous process.
Pros
Its relatively easy to navigate. Love the invoice features, as I can customize what I need. The payment link to send to your clients is very nice and not a feature we had with our previous merchant services provider. The reports are easy to read and the quick summary of each client is very useful
Cons
Seeing an audit trail of whether or not an invoice was sent can be difficult.
Randy
Company size: 1 employee
Industry: Chemicals
Time used: Less than 6 months
Review Source: Capterra
This review was submitted organically. No incentive was offered
April 2019
Easy to Use - Customer Service On Point
Being able to keep cards on file and charge them after my lawn services are complete is a lifesaver. It keeps me from having to bill each customer, or chase my money down from now on. Also, the way they charge you for accepting credit cards is extremely clear and one reason I went with them. The larger I get, the more affordable FattMerchant will be as well, since the main cost each month is the flat monthly fee that will never change for you once you sign-up with them.
Pros
Fattmerchant is so easy to use, even to me who has never really used a credit card processor to speak of. The software hasn't been without flaw, but what I like is anytime an issue has come up I email the small team at FattMerchant and they get back to me quickly and work to fix the problem and then update me on their progress. Maybe someday when they get really big this won't be the case, but for right now I am really impressed with their response and customer service. I've already recommended this to one of my friends and will be recommending it more in the future. Plus they give incentives for recommending them, which is nice.
Cons
I wish they had a way where I could send someone a form and not an invoice to collect a card number. I wouldn't even need to be able to see the entire number, but if it could just collect it to be charged in the future. Right now the only way I have to collect a card number is either have the customer pay the first invoice, or have them call me and collect it over the phone, which I don't like. This is really the only thing I wish they would find a solution for though.
Rebecca
Company size: 2-10 employees
Industry: Veterinary
Time used: Less than 2 years
Review Source: Capterra
This review was submitted organically. No incentive was offered
January 2019
Great Company
We went from 1 owner to the next. They made the transaction from 1 to the other easy. And the fees are great. My CPA was impressed with how much we saved.
Pros
Easy to use. Customer support was great.
Cons
I Dont have one. No complaints, even when it was a minor issue they fixed it.

Stax
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