Fattmerchant, now operating under the name Stax, entered the payments industry with a clear goal: to disrupt traditional payment processing with transparent pricing and modern tools. Founded in 2014, the company set out to simplify how businesses accept payments by offering flat-rate subscription pricing; a significant shift from the percentage-based markups charged by most merchant service providers. Lets read more about Fattmerchant Review.
The brand’s guiding principle is to eliminate uncertainty from transaction costs. Fattmerchant charges a fixed monthly subscription fee in place of a variable rate on each sale, but it provides users with direct access to interchange rates. Businesses can more easily forecast monthly expenses with this method, particularly those with larger processing volumes.
Because of its early market presence and initial reputation, many people still call it Fattmerchant even after it changed its name to Stax. Invoicing, analytics, mobile payments, ACH processing, and a cloud-based dashboard for centralised reporting are just a few of the new features that the platform has added over time.
Fattmerchant isn’t a fit for every type of business, but it’s designed to appeal to growth-focused companies that want to better manage their payment infrastructure without dealing with surprise charges or complex fee structures. In this review, we’ll explore whether its pricing model, features, and support justify the switch for small and mid-sized businesses.
Fattmerchant delivers a full suite of payment solutions that go beyond basic transaction processing. At its core, the platform supports credit and debit card payments, ACH transfers, mobile transactions, and e-commerce integrations, all through a centralized software environment. This makes it easier for businesses to handle all payment activity in one place.
One of the platform’s strengths is its robust virtual terminal, which allows businesses to process payments from anywhere using a web browser. This is especially useful for service-based industries or remote billing. In addition to the terminal, Fattmerchant provides custom invoicing tools, which support recurring billing and automated reminders; key features for businesses with subscription models or long billing cycles.
Its dashboard offers real-time data and analytics on transactions, customer behavior, and cash flow. Users can generate reports, track trends, and make data-driven decisions without relying on third-party analytics tools. For businesses that use accounting software like QuickBooks, Fattmerchant integrates natively, simplifying bookkeeping and reconciliation.
Another notable feature is the platform’s mobile capability. Through its mobile app and card readers, businesses can accept payments on-the-go, making it ideal for trade shows, field services, or delivery-based operations.
Altogether, the platform’s blend of tools is built to support omnichannel sales and provide visibility into performance. While some users may find certain functions basic compared to more specialized tools, the all-in-one accessibility can be a major convenience for small teams and growing businesses.
Fattmerchant’s most distinctive trait is its subscription pricing model. Unlike traditional merchant accounts that charge a markup on top of interchange fees, Fattmerchant offers a flat monthly fee and passes interchange rates directly to the merchant. This means businesses pay exactly what the credit card networks charge, with no additional percentage-based markups.
For example, instead of paying 2.9% + 30¢ on every transaction, a business might pay a set monthly fee (e.g., $99 or $199) and just the interchange fee for each card type. This setup can result in significant savings for companies processing large volumes, as the monthly fee remains fixed regardless of how many sales are made.
Usually, there are a few subscription tiers according to business type and volume. Higher tiers support enterprise needs, while lower tiers serve small businesses. It’s crucial to remember that although the flat-rate model provides clarity and possible cost savings, low-volume businesses might not find it to be financially advantageous. The fixed fee might be greater than the savings from direct interchange for those who process less than a specific amount each month.
A true cost comparison should also account for additional possible expenses like gateway fees, add-on features, and terminal rentals that are included in Fattmerchant’s model. All things considered, the subscription model offers transparency and savings that can surpass conventional fee structures for companies with steady or increasing transaction volumes.
Fattmerchant supports a wide range of payment acceptance methods, making it a strong choice for businesses that operate across multiple sales channels. Whether you’re accepting payments in-store, online, or on-the-go, the platform ensures a seamless experience with unified reporting. For brick-and-mortar retailers, the system works with countertop terminals and full-featured point-of-sale solutions. These devices are EMV-compliant and support contactless payments, ensuring security and convenience for customers.
In the online space, Fattmerchant allows businesses to create hosted payment pages, integrate with e-commerce platforms, and generate payment links for email or text invoicing. This is especially useful for businesses offering remote services or digital goods. Its API also allows for deeper integrations into custom-built platforms. The mobile payment solution is another highlight. With a mobile app and Bluetooth card reader, business owners can process payments from smartphones or tablets; perfect for fieldwork, mobile vendors, or on-site services.
All channels feed into a centralized dashboard, meaning you can track and reconcile transactions from every location in one place. This unified view is ideal for businesses juggling multiple storefronts, sales reps, or distribution methods. While Fattmerchant may not offer the most advanced customization options compared to standalone POS platforms, the ability to operate seamlessly across channels with unified data is a clear advantage for growing businesses looking for an integrated payments solution.
Fattmerchant’s backend software, now branded under the Stax platform, offers an intuitive interface that consolidates payment processing, reporting, invoicing, and customer management in one dashboard. It’s cloud-based, which means there’s no installation required and data can be accessed securely from anywhere.
Revenue can be broken down by day, customer, or payment method using the real-time reporting features built into the software. Without requiring an additional analytics subscription, this can assist business owners in understanding seasonal trends, high-performing services, and areas for improvement. One significant benefit is Fattmerchant’s native QuickBooks integration, which enables transaction data syncing automatically. Businesses that handle a lot of transactions every day will find this feature especially helpful as it reduces manual bookkeeping errors and saves time on reconciliation.
Through third-party connectors and APIs, Fattmerchant integrates with popular platforms and shopping carts. Businesses that need to link their payment system to CRM software, inventory management tools, or custom apps will love this flexibility. However, users with very specific software needs may find that some integrations require developer involvement or incur extra fees. While the platform supports the essentials, highly customized workflows may require additional setup. Overall, the software side of Fattmerchant is user-friendly and practical for small to mid-sized businesses, offering valuable features without a steep learning curve.
Fattmerchant offers a variety of hardware solutions that cater to different business environments, including countertop terminals, wireless readers, and mobile devices. The platform supports both EMV and NFC payments, ensuring compatibility with the latest industry standards.
For in-store transactions, users can opt for terminals from brands like Verifone and Clover, which are compatible with Fattmerchant’s processing backend. These devices are reliable and feature-rich, offering touchscreen displays, receipt printers, and PIN pad functionality.
Mobile businesses can use Fattmerchant’s Bluetooth card reader paired with a mobile app. This setup allows for easy payments at events, customer homes, or pop-up locations. The card reader accepts chip cards and contactless payments, including mobile wallets like Apple Pay and Google Pay.
Fattmerchant also supports more robust POS systems for businesses that require inventory management, employee permissions, and customer profiles. These systems can be configured for retail, healthcare, or service-based industries, depending on the need. Hardware can be purchased outright or leased depending on the business’s budget and processing volume. However, it’s important to confirm pricing details in advance, as hardware costs are often separate from the monthly subscription fee.
While Fattmerchant doesn’t manufacture its own devices, its compatibility with popular brands offers flexibility. It’s a solid choice for businesses looking for reliable and customizable hardware without vendor lock-in.
When assessing any payment processor, customer service is a crucial component, and Fattmerchant typically scores highly for its assistance. During business hours, the company provides help via phone, email, and chat, and customers say that its agents are friendly and informed. One area of strength is onboarding. During setup, new users are often paired with a dedicated support agent, which facilitates the transfer from an old provider. Guided tutorials, live assistance, and documentation covering everything from terminal installation to dashboard configuration are all part of the onboarding process.
The platform’s user interface is clear and simple to use. The dashboard’s distinct categories for transactions, analytics, invoicing, and other areas will make it easy for business owners who are not very tech-savvy to use. The mobile app also mirrors much of the desktop experience, making it easier to manage payments on the move. Some users, however, have noted slower response times during peak hours or delays when escalations are needed. Additionally, weekend support may be limited depending on the service plan.
Overall, Fattmerchant’s support system and user experience cater well to the small-to-medium business segment. The emphasis on simplicity and accessibility reduces learning curves and minimizes disruptions during setup and daily operations.
Security is non-negotiable when it comes to handling payments, and Fattmerchant meets industry expectations with its PCI-compliant infrastructure. The platform ensures that all transactions are encrypted and tokenized, protecting cardholder data at every step of the transaction process.
Fattmerchant uses end-to-end encryption to safeguard information both in transit and at rest. This significantly lowers the risk of data breaches or unauthorized access, especially for businesses operating online or across mobile channels.
The company also offers tools to help merchants maintain PCI compliance, such as self-assessment guides, quarterly scans (if needed), and customer support to clarify compliance requirements. These are important resources for businesses that may not have in-house IT security expertise. For fraud prevention, Fattmerchant includes basic risk monitoring features such as velocity checks and AVS support. While these tools are effective for standard use cases, larger businesses or those in high-risk industries may require more advanced fraud detection layers, which could involve third-party integrations.
There are no major red flags in terms of security, and the company follows best practices. However, as with any processor, it’s essential for merchants to stay proactive about compliance and regularly review their security posture, especially as threats evolve.
Established small to mid-sized businesses that handle a moderate to high volume of transactions each month are the ideal candidates for Fattmerchant. It functions best when processing volumes are high enough to offset the fixed monthly fee because its value is linked to savings from flat-rate pricing. The platform will be very helpful to software platforms with recurring billing requirements, retail establishments, service providers, and professional offices (such as legal and healthcare). Businesses that want integrated tools without having to deal with multiple vendors for terminals, invoicing, analytics, and reporting will find it particularly useful.
However, a pay-as-you-go processor, where monthly fees are directly linked to usage, might offer better value for companies with irregular transaction volumes or low monthly sales. For these users, Fattmerchant’s fixed fee could cut into profits unless their volume increases consistently. Tech-savvy businesses may also benefit more, as deeper integrations via API can unlock additional functionality. That said, the platform’s user interface is friendly enough for those who prefer simplicity over customization.
In short, Fattmerchant fits businesses looking for transparency, modern tools, and cost control, but isn’t the best match for startups or seasonal vendors with minimal sales activity.
Fattmerchant presents a modern alternative to legacy processors, offering a clear, cost-effective pricing model alongside useful tools for managing transactions and customer data. Its subscription-based approach is a major advantage for high-volume businesses looking to avoid unpredictable transaction fees.
Among the key benefits are:
Transparent pricing with direct interchange access
Unified dashboard for in-person, online, and mobile sales
Strong integrations with accounting tools like QuickBooks
Solid customer service and onboarding
Real-time analytics and reporting features
It does have some limitations, though. Smaller companies might find it difficult to defend the monthly charge, particularly if their processing volumes fluctuate. There may be extra charges for certain advanced features or hardware configurations. Furthermore, although its tools are useful, they might not be as comprehensive as specialised platforms for specialised business requirements.
All things considered, Fattmerchant provides an alluring bundle for companies prepared to grow and gain greater command over their payment system. It provides both efficiency and savings for the appropriate customer segment.
Is Fattmerchant the same as Stax?
Yes. Fattmerchant rebranded to Stax, but the core product, pricing model, and features remain consistent. Many users still refer to it by its original name.
Does Fattmerchant lock users into long-term contracts?
No. Fattmerchant typically operates on month-to-month agreements, giving businesses the flexibility to cancel without hefty termination fees.
Can Fattmerchant really save money on payment processing?
Yes, for businesses with high monthly transaction volumes, the flat subscription fee can significantly reduce overall costs compared to percentage-based processors.