--- description: Review of Stax Software: system overview, features, price and cost information. Get free demos and compare to similar programs on Software Advice Ireland. image: https://gdm-localsites-assets-gfprod.imgix.net/images/software_advice/og_logo-55146305bbe7b450bea05c18e9be9c9a.png title: Stax | Reviews, Pricing & Demos - SoftwareAdvice IE --- Breadcrumb: [Home](/) > [Mobile Credit Card Processing Software](/directory/4759/mobile-credit-card-processing-software/software) > [Stax](/software/390708/stax) # Stax Canonical: https://www.softwareadvice.ie/software/390708/stax Page: 1 / 6\ Next: [Next page](https://www.softwareadvice.ie/software/390708/stax?page=2) > Stax is an all-in-one payment technology platform built for businesses that have outgrown flat-rate processors. With subscription-based pricing and 0% markup on direct-cost interchange, Stax saves businesses up to 40% on payment processing fees — no hidden costs, no percentage markups. The platform includes Stax Pay for in-person, online, and mobile payment acceptance; Stax Bill for automated recurring billing and invoicing; CardX for compliant credit card surcharging; and Stax Connect, an embedded payments solution that enables SaaS companies and ISVs to integrate full-stack payment processing directly into their software. As an end-to-end processor, Stax handles the entire transaction lifecycle in-house — from authorization to settlement — giving businesses and software platforms more control, better economics, and dedicated support. Over 30,000 businesses trust Stax to process more than $30 billion in payments. > > Verdict: Rated **4.1/5** by 129 users. Top-rated for **Likelihood to recommend**. ----- ## Quick Stats & Ratings | Metric | Rating | Detail | | **Overall** | **4.1/5** | 129 Reviews | | Ease of Use | 4.3/5 | Based on overall reviews | | Customer Support | 4.0/5 | Based on overall reviews | | Value for Money | 4.1/5 | Based on overall reviews | | Features | 4.2/5 | Based on overall reviews | | Recommendation percentage | 70% | (7/10 Likelihood to recommend) | ## About the vendor - **Company**: Fattmerchant - **Location**: Orlando, US - **Founded**: 2014 ## Commercial Context - **Starting Price**: US$99.00 - **Pricing model**: Flat Rate - **Pricing Details**: Subscription Price: $99+ per month - **Target Audience**: Self Employed, 2–10, 11–50, 51–200, 201–500, 501–1,000, 1,001–5,000, 5,001–10,000, 10,000+ - **Deployment & Platforms**: Cloud, SaaS, Web-based, Mac (Desktop), Windows (Desktop), Android (Mobile), iPhone (Mobile), iPad (Mobile) - **Supported Languages**: English - **Available Countries**: United States ## Features - ACH Payment Processing - API - Alerts/Notifications - Barcode/Ticket Scanning - Billing & Invoicing - Billing Portal - Contact Database - Contactless NFC - Credit Card Management - Credit Card Processing - Customisable Branding - Customisable Invoices - Customisable Reports - Data Import/Export - Data Synchronisation - Debit/Credit Card Processing - Discount Management - Electronic Payments - Electronic Signature - Financial Reporting ## Integrations (20 total) - Actionstep Legal Accounting - Apple Pay - CardConnect - Google Pay - Lightspeed - Mailchimp - OptiMantra - Pronto - QuickBooks Online - QuickBooks Online Advanced - Salesforce.org Nonprofit Cloud - Shopify - Slack - TouchBistro - WooCommerce ... and 5 more integrations ## Support Options - Email/Help Desk - Knowledge Base - Phone Support - 24/7 (Live rep) - Chat ## Category - [Mobile Credit Card Processing Software](https://www.softwareadvice.ie/directory/4759/mobile-credit-card-processing-software/software) ## Related Categories - [Mobile Credit Card Processing Software](https://www.softwareadvice.ie/directory/4759/mobile-credit-card-processing-software/software) - [Sporting Goods POS Software](https://www.softwareadvice.ie/directory/109/sporting-goods-store-software/software) - [Bookstore Software](https://www.softwareadvice.ie/directory/72/bookstore-software/software) - [Retail Accounting Software](https://www.softwareadvice.ie/directory/31/accounting-software/software) - [Small Business POS Software](https://www.softwareadvice.ie/directory/456/small-business-pos/software) ## Alternatives 1. [PayPal](https://www.softwareadvice.ie/software/104664/paypal) — 4.6/5 (26419 reviews) 2. [Venmo](https://www.softwareadvice.ie/software/317580/venmo) — 4.7/5 (9282 reviews) 3. [Stripe](https://www.softwareadvice.ie/software/49509/stripe) — 4.6/5 (3342 reviews) 4. [Square Payments](https://www.softwareadvice.ie/software/374157/square-payments) — 4.7/5 (2687 reviews) 5. [Square Point of Sale](https://www.softwareadvice.ie/software/374161/square-register-pos) — 4.6/5 (3031 reviews) ## Reviews ### "We save $1,000's on fees with FattMerchant" — 5.0/5 > **Matt** | *3 December 2019* | Marketing & Advertising | Recommendation rating: 10.0/10 > > **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. > > 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. ----- ### "Make the switch today\!" — 5.0/5 > **Rebecca** | *17 March 2026* | Legal Services | Recommendation rating: 9.0/10 > > **Pros**: Transitioning to Stax was quite simple and easy to manage with a user friendly dashboard and available support. Other pluses include customer invoicing feature for online payment requests as well as setting up recurring payment plan options. > > **Cons**: Occasional lag time with reporting delays, we had an issue with QBO syncing as well which resulted in duplicate invoices. > > Since from transitioning from Clover to Stax two years ago, our company has saved a considerable amount in processing fees not to mention time saved from searching for past invoices. The reporting features and dash board is easy to use, support team is readily available (shout out to \[sensitive content hidden\]), and invoicing and payment plan features are extremely helpful. Highly recommend\! ----- ### "Lots of good, some meh" — 3.0/5 > **LESLEY** | *27 April 2026* | Health, Wellness & Fitness | Recommendation rating: 7.0/10 > > **Pros**: I picked Stax because Square was increasing its prices, and I wanted to avoid passing more costs on to my customers. > > **Cons**: It takes to long for yesterdays charges to make it to my bank account. Using Square, if it was charged by 8pm, it was deposited very early the next morning. The dashboard on the mobile app is not as user friendly or capable as I would like in checking daily, weekly charges. New payments using store credit cards is time consuming and cumbersome. > > Over all I am pleased with the pricing, but it is less convenient than Square in many way. Customer service has been helpful and responds in a timely fashion. ----- ### "STAX Review" — 5.0/5 > **Jesus** | *27 April 2026* | Health, Wellness & Fitness | Recommendation rating: 9.0/10 > > **Pros**: Payment processing is easy and flexible. Only paying the interchange and a nominal fee per transaction. > > **Cons**: The monthly fee should be scaled down as we process more otherwise the system is great. It’s meeting all the expectations > > Great so far. The assistance to get the program started has been amazing. All the support has been to Pat ----- ### "Great Payment Processor - Good Fee Structure & Support" — 5.0/5 > **Karsten** | *27 April 2026* | Accounting | Recommendation rating: 8.0/10 > > **Pros**: Solid fee structure. Personal account manager/support. Ability to take ACH over the phone without micro-deposits. Setup \& approved within 48 hours. > > **Cons**: The UI on their payment portal is wonky. Most other processors have much much prettier UIS. Recurring payment features are also a bit wonky, but it works so whatever. > > Contacted Stax after I got a 20% reserve on Stripe, without warning or being able to contact a human being about it. Stax got me setup within 48 hours with a great fee structure and amazing payment capabilities. ----- Page: 1 / 6\ Next: [Next page](https://www.softwareadvice.ie/software/390708/stax?page=2) ## Links - [View on SoftwareAdvice](https://www.softwareadvice.ie/software/390708/stax) ## This page is available in the following languages | Locale | URL | | en | | | en-AU | | | en-GB | | | en-IE | | | en-NZ | | ----- ## Structured Data