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Stax vs Fortis Comparison (2026)

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Stax

Fortis

Overview

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

Fortis is a payment processing and invoicing solution that helps businesses receive payments, monitor transactions, capture eSignatures, send payment requests, and more on a centralized platform. It enables team members to create one-time and recurring invoices in compliance with PCI-DSS guidelines.

Platforms supported

Web-based
iPhone app
Android app
Windows Phone app

Typical customers

Freelancers
Small businesses
Mid size businesses
Large enterprises

Customer support

Phone
Online
Knowledge base
Video tutorials

view more detailsview details

Platforms supported

Web-based
iPhone app
Android app
Windows Phone app

Typical customers

Freelancers
Small businesses
Mid size businesses
Large enterprises

Customer support

Phone
Online
Knowledge base
Video tutorials

view more detailsview details

Video & Screenshots

Pricing

Starting from

Per month

Free trial available
Credit cardless trial
Free account
Subscription based

Starting from

No pricing info

Free trial available
Credit cardless trial
Free account
Subscription based

User reviews

4.2

148

Value for money

Ease of use

Features

Customer support

66%

would recommend this app

4.6

119

Value for money

Ease of use

Features

Customer support

84%

would recommend this app

Pros

“The value proposition is immediately apparent — the subscription-based pricing model has delivered noticeable savings on transaction fees compared to traditional percentage-based processors, and those savings add up quickly for a business processing regular volume.”

todd s.

Owner

“Overall, I was able to get my rate reduced to where I need it to be as a small business owner and [sensitive content hidden] was very professional and helpful following up with me via phone as well as email to close the loop.”

Cory E.

Owner

“The platform has helped streamline payment management for my business, and the support and ease of use have made the transition smooth.”

Christina C.

Owner

Pros

“That level of accountability built trust and made me feel confident in the platform. While no system is perfect, Fortis consistently demonstrated a willingness to listen, correct problems, and improve the user experience, which ultimately made working with them a positive and worthwhile partnership.”

Dr. M.

Owner

“The implementation process was far easier than expected, which significantly reduced onboarding time and minimized disruption to our office workflow.”

Dr. M.

Owner

“Anytime an issue arose—whether it was a question, technical hiccup, or billing concern—their responsiveness stood out.”

Dr. M.

Owner

Cons

“The online app sometimes doesn't update as fast as I would like and sometimes the notifications are delayed as well.”