Stax vs Fortis

Square Payments

Clover

authorize.net

PayPal Checkout

Helcim

ddSuite

Compare Stax and Fortis based on features, pricing, verified reviews, integrations & more on GetApp. Find out which software is best for your business in 2026.

Clover is an all-in-one platform designed to help on and offline retailers, quick service restaurants, and other service businesses manage their point-of-sale operations, with secure payment solutions and reliable business management features

Square Payments is an online payment processing solution which integrates with Square hardware & POS software to allow businesses to accept payments

Helcim enables credit card processing for your business, sign up with no commitments, contracts, or monthly fees. At Helcim, our goal is to provide small to medium sized businesses with the opportunity to accept credit card payments at affordable rates with industry-leading technology.

Stax delivers seamless payment processing and scalable embedded payment solutions to SMBs, ISVs, and SaaS businesses.

ACH Payment Processing

Alerts/Notifications

Barcode/Ticket Scanning

Billing & Invoicing

Billing Portal

Contact Database

Contactless NFC

Credit Card Management

Credit Card Processing

Customizable Branding

Customizable Invoices

Customizable Reports

Data Import/Export

Data Synchronization

Debit/Credit Card Processing

Discount Management

Electronic Payments

Electronic Signature

Financial Reporting

Gift Card Management

In-Person Payments

Invoice Creation

Invoice History

Invoice Management

Invoice Processing

Mobile Access

Mobile Card Reader

Mobile Payments

Multi-Currency

Multi-Location

Multiple Payment Options

Online Invoicing

Online Payments

Payment Gateway Integration

Payment Links

Payment Processing

PCI Compliance

Point of Sale (POS)

Point of Sale (POS) Integration

QuickBooks Integration

Real-Time Data

Real-Time Reporting

Receipt Management

Recurring/Subscription Billing

Reporting & Statistics

Reporting/Analytics

Sales Reports

Self Service Portal

Tax Calculation

Third-Party Integrations

Transaction History

Transaction Monitoring

Visual Analytics

Stax

Android

Web-based

Windows

iPad

iPhone

Business Owner

Their helpline is always open and has been super supportive in getting my questions answered. Payments are processed quickly and my clients have found the system easy to use and invoices were helpful.

They keep taking funds out of my account despite their associate sending me an email stating that my account is closed. Total liars and so dishonest.

I see my money transfers quickly and I love not having to deal with the high percentages taken from my profit like other processors.

Love the ease of use, very intuitive and operational very friendly. Also, less expensive than our previous provider.

Owner

The staff is very helpful with the onboarding process, and the sales representatives are delightful to work with.

I love how easy and understanding it is to use Stax and how the recurring billing is set up. I will recommend this company to everyone I know.

Fattmerchant was a lifesaver in getting our business set up. We talked to many companies in this process who exhausted us by their lack of customer service skills or willingness to help effectively.

Stay away from this unethical business. We are so sorry we did business with them.

Practice Manager

The system is simple to navigate and easy to learn. Super user friendly, and whenever a issue arises, their support staff handle it quickly and tactfully.

Do yourself a favor and ask around and do your due diligence before signing up. This way, when things go bad you can only blame yourself.

Customer service is horrible. For example I called twice today to speak with a rep about issues.

Manager

They always deny issues are their fault. Always some other company.

President

So far everything has been GREAT. Saving more money per month than I could have imagined when I first was looking for a new processor of CCs.

Provider

The terminal seems like it will be very easy to use. Sensitive content hidden] has made my learning curve less steep with getting the system integrated.

Goto a company that will treat you right and really want to earn your business, which Stax doesn't try to earn, its almost like expected.

Uncaring, incompetent customer service; high costs; stealthy increases in costs.

Chief Operating Officer

Software is straightforward and they offered competitive rates.

We have been with Stax for ~8 years and it's been good. My only complaint is they have not updated system to integrate with auto matching payments to QB in 8 years.

Stax screenshot: Stax Themed Reader

Stax screenshot: Stax Themed Product Suite

Stax screenshot: Stax Mobile App

Stax screenshot: Stax Desktop

Stax screenshot: Stax Mobile App & Desktop

Stax screenshot: Stax Connect Portal Homescreen

Freelancers

Large Enterprises

Mid Size Business

Small Business

authorize.net supports payment processing by helping businesses accept credit card and eCheck payments online, in person, via mobile devices, and more. The product offers a range of features, including online payments, mobile point of sale, virtual point of sale, phone payments, eCheck payments, digital invoicing, and fraud protection. It provides account updater and recurring payments capabilities to help businesses manage payments.

PayPal Checkout is a payment checkout platform that enables retailers to process payments via various payment modes.

ddSuite software from DDC Schweiz allows object data of large infrastructure objects to be viewed from the overall view down to the smallest detail, managed and orders and invoices to be triggered.

Fortis delivers embedded payment solutions for ERP and software platforms, enabling secure, seamless acceptance of credit, ACH, and digital wallets—online, in-app, or in person—while improving cash flow and simplifying invoicing and billing.

Contingency Billing

Data Security

Dunning Management

Fraud Detection

Hourly Billing

Partial Payments

Process/Workflow Automation

Project Billing

Fortis

Billing Manager

I love how user friendly this software is. It is super quick and easy to set up new users as well.

During that time we have developed a very good working relationship with  the help center at OmniFund. They are top rate and easy to reach and communicate with.

office manager

Easy to integrate to my billing software. I love giving my clients the ability to pay online and have their payments applied to their account.

Finance Manager

The ease of payment is the best feature. Customer support is very attentive and timely.

Insurance Specialist II

My overall experience is good with OMNI FUND and customer service has been helpful when needed.

We found this product very easy to use. We like the ability to schedule payments.

Omnifund allows my clients to make payments online. I love how it easily integrated in my billing software, ImagineTime, and allowed a seamless payment platform.

It is confusing trying to understand what the fees are for each transaction. I am the finance manager and I am still somewhat in the dark concerning the all the fees.

RECEPTIONIST

Overall experience with OmniFund has been great and satisfying.

Patient Services Coordinator

Very easy to navigate through, especially in a busy office like ours.

Administrator

It's also nice to look at transactions that have occurred and separate it by a date search or a name search. We were able to customize it so we can type in reference codes that make sense to us.

Controller

There has not been any times that we have received payments that were rejected.

Accounting Associate II 

I use Omni Fund every day and I like that the program is very easy to use.

Treasury Analyst

Ease of support and reconciliation of revenue.

I like how the program saves name and credit card numbers so you don't have to type them in each time.

Its hard to search on a customers' transactions (only by name).

Office Manager

Omni fund is user friendly and increases our pt revenue.

It's very hard to find fault with this system, so I don't think I'm going to make something up.

Fortis screenshot: Fortis provides a wide range of mobility and desktop reporting and processing options.

Fortis screenshot: Fortis provides payment solutions that support mobility across industries including healthcare, field services, construction, hospitality, retail, eCommerce, and professional services.

Stax vs Fortis Comparison (2026)

Stax

Fortis

Overview

Video & Screenshots

Pricing

User reviews

Key features

Integrations

Alternatives