--- description: Review of Stax Software: system overview, features, price and cost information. Get free demos and compare to similar programs. image: https://gdm-localsites-assets-gfprod.imgix.net/images/software_advice/og_logo-55146305bbe7b450bea05c18e9be9c9a.png title: Stax | Reviews, Pricing & Demos - SoftwareAdvice GB --- Breadcrumb: [Home](/) > [Mobile Credit Card Processing Software](/directory/4759/mobile-credit-card-processing-software/software) > [Stax](/software/390708/stax) # Stax Canonical: https://www.softwareadvice.co.uk/software/390708/stax Page: 1 / 6\ Next: [Next page](https://www.softwareadvice.co.uk/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 **4.0/5** by 117 users. Top-rated for **Likelihood to recommend**. ----- ## Quick Stats & Ratings | Metric | Rating | Detail | | **Overall** | **4.0/5** | 117 Reviews | | Ease of Use | 4.2/5 | Based on overall reviews | | Customer Support | 3.9/5 | Based on overall reviews | | Value for Money | 4.0/5 | Based on overall reviews | | Features | 4.1/5 | 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.co.uk/directory/4759/mobile-credit-card-processing-software/software) ## Related Categories - [Mobile Credit Card Processing Software](https://www.softwareadvice.co.uk/directory/4759/mobile-credit-card-processing-software/software) - [Sporting Goods POS Software](https://www.softwareadvice.co.uk/directory/109/sporting-goods-store-software/software) - [Bookstore Software](https://www.softwareadvice.co.uk/directory/72/bookstore-software/software) - [Retail Accounting Software](https://www.softwareadvice.co.uk/directory/31/accounting-software/software) - [POS Software for Small Business](https://www.softwareadvice.co.uk/directory/456/small-business-pos/software) ## Alternatives 1. [PayPal](https://www.softwareadvice.co.uk/software/104664/paypal) — 4.6/5 (26302 reviews) 2. [Venmo](https://www.softwareadvice.co.uk/software/317580/venmo) — 4.7/5 (9271 reviews) 3. [Stripe](https://www.softwareadvice.co.uk/software/49509/stripe) — 4.6/5 (3309 reviews) 4. [Square Payments](https://www.softwareadvice.co.uk/software/374157/square-payments) — 4.7/5 (2672 reviews) 5. [Square Point of Sale](https://www.softwareadvice.co.uk/software/374161/square-register-pos) — 4.6/5 (3022 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\! ----- ### "So so sevice" — 3.0/5 > **Kim** | *25 February 2026* | Transportation/Trucking/Railroad | Recommendation rating: 2.0/10 > > **Pros**: Love the cost associated with monthly use. Stax is almost $2500 per year cheaper than many competitors. > > **Cons**: Payments take to long. A Thursday sale does not get paid until the following monday. Other companies pay in 24 hours and on weekends. > > Very difficult changing bank accouts Was upset about the situation called 10 times submitted paperwork 3 times and it took a full month to get it in order ----- ### "\[sensitive content hidden\] are both AWESOME\!" — 5.0/5 > **Kim** | *5 December 2025* | Design | Recommendation rating: 10.0/10 > > **Pros**: We've been with them for years. Always great service. \[sensitive content hidden\] is fantastic\! Clear, concise and explains things very well. I always get a follow-email to see if there is anything else I need from her which is great because I usually forget to ask her something\! :) > > **Cons**: Nothing. It's the easy button where credit card processing is concerned. No one loves paying credit card fees, but since we have to, we're happy to have Stax. > > Outstanding. I'm busy so when I find a service I can trust and not question their practices, I stick with them. We've been with Stax for longer than I can remember at this point, and I don't plan on going anywhere. ----- ### "Awesome merchant account\!" — 5.0/5 > **John** | *25 February 2026* | Health, Wellness & Fitness | Recommendation rating: 10.0/10 > > **Pros**: It was easy to use. Good customer service. Quick processing times. Overall, it has been an excellent merchant account. > > **Cons**: Onboarding to a bit of time. They requested a bunch of documents because we were considered a "high risk" business. ----- Page: 1 / 6\ Next: [Next page](https://www.softwareadvice.co.uk/software/390708/stax?page=2) ## Links - [View on SoftwareAdvice](https://www.softwareadvice.co.uk/software/390708/stax) ## This page is available in the following languages | Locale | URL | | en | | | en-AU | | | en-GB | | | en-IE | | | en-NZ | | ----- ## Structured Data