Four vs Fattmerchant Comparison
Four
Starting at Contact for pricing
- Large Enterprises
- Medium Business
Four is an innovative tech company focusing on giving customers the option to buy now and pay later as well as a variety of purchase financing solutions. We design eCommerce plugins that enable Retailers to offer their c…
Fattmerchant
Starting at $49 /Month
- Large Enterprises
- Medium Business
Fattmerchant, now branded as Stax, is a payment processing platform for small and mid-sized US businesses that charges a flat monthly subscription plus interchange cost rather than a per-transaction markup, which lowers…
Four leads on user satisfaction with a 4.6-star rating across 5 reviews.
Four vs Fattmerchant — at a glance
| Feature | Four | Fattmerchant |
|---|---|---|
| Rating | 4.6 / 5 | 3.9 / 5 |
| Reviews | 5 | 122 |
| Starting price | Contact for pricing | $49 /Month |
| Free trial | No | No |
| Free version | No | No |
| Best for | Large Enterprises, Medium Business, Small Business | Large Enterprises, Medium Business, Small Business |
| Category | Payment Processing Software | Payment Processing Software |
| Platforms | SaaS/Web/Cloud, Mobile - Android, Mobile - iOS | SaaS/Web/Cloud, Mobile - Android, Mobile - iOS |
| API | — | Available |
| Support modes | Online | 24/7 (Live rep), Online |
| Certifications | — | SOC 2, GDPR |
| Data residency | US | US |
Key differences between Four and Fattmerchant
- Pricing: Fattmerchant starts at $49 /Month. Four pricing is not publicly listed.
- User satisfaction: Four scores higher with a 4.6-star average.
- Deployment: Four supports SaaS/Web/Cloud, Mobile - Android, Mobile - iOS; Fattmerchant supports SaaS/Web/Cloud, Mobile - Android, Mobile - iOS.
Four vs Fattmerchant — find the better fit before you commit.
Which tool fits your team best
Which is actually cheaper for your team size
Where each product wins, per real buyers
Most Payment Processing Software tools look identical on paper. This comparison cuts to the differences that matter — pricing structure, team fit, and what real buyers found after signing up.
Biggest differences
Features
Pricing
Buying details
Security
Buyer feedback
Integrations
Product tour
Other options
Talk to an expert Talk to an expert |
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Four vs Fattmerchant: Biggest differences
Start here before you go deeper into features.
Best for eCommerce retailers needing flexible buy-now-pay-later payment options.
- You want to offer customers diverse and flexible payment methods to boost sales.
- Your team includes eCommerce managers or finance professionals managing payment solutions.
- You operate a small or large business with online sales channels requiring configurable plugins.
- Your business lacks an online sales channel or eCommerce presence.
- You require transparent, fixed pricing and simple, out-of-the-box payment integrations.
Large Enterprises, Medium Business, Small Business
Four typically suits Large Enterprises and Medium Business. Fattmerchant tends to fit Large Enterprises and Medium Business better. The right choice depends on your team size, workflow, and whether a free trial matters.
Description | Four is an innovative tech company focusing on giving customers the option to buy now and pay later as well as a variety of purchase financing solutions. We design eCommerce plugins that ... Read More about Four | Fattmerchant, now branded as Stax, is a payment processing platform for small and mid-sized US businesses that charges a flat monthly subscription plus interchange cost rather than a ... Read More about Fattmerchant |
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Entry Level Pricing |
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Free Trial Availability |
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User RatingsBased on verified Spotsaas reviews | ||
Best Company Size | Small BusinessLarge Enterprises | — |
Get pricing help | Get pricing help |
Software Demo
Demo |  Four has not given any software demo yet If you're the owner of this profile, add your demo.Contact us |
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How do Four and Fattmerchant Compare on Features?
Total Features | 6 Features | 8 Features |
|---|---|---|
Unique Features | No unique features | No unique features |
Get Quote | Get Quote |
Compare Four and Fattmerchant on pricing
Review starting price, plan structure, and free-trial access side by side so you can see which option fits your budget and buying process.
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Pricing Page | Pricing information not available |  |
Four vs Fattmerchant: Other Details
Organization Types supported |
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Platforms Supported |
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Modes of support |
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API Support |
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Get help choosing | Get help choosing |
Four vs Fattmerchant Security & Compliance
Certifications, data handling, and security controls for IT and compliance evaluators.
SOC 2 | — | ✓ Yes |
|---|---|---|
HIPAA | ✗ No | ✗ No |
GDPR | — | ✓ Yes |
Data Encryption | — | ✓ Yes |
Data Residency | 🇺🇸 US | 🇺🇸 US |
Four User Reviews & Rating Comparison
User Ratings | ||
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Rating Distribution | ||
Spotsaas Editor’s POV generated by AI | Buyer sentiment Overall buyer sentiment is very positive, highlighting convenience and payment flexibility. What buyers like
Common complaints
| Buyer sentiment Buyer sentiment is mixed to positive across 183 reviews, with clear strengths and a few common watchouts. What buyers like
Common complaints
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Pros and Cons |
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Positive Reviews | No reviews available for the product | No reviews available for the product |
| Negative Reviews | No reviews available for the product | No reviews available for the product |
Media and Screenshots
Videos | No videos available. |  3 Videos |
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Top Alternatives to Four and Fattmerchant in 2026
Alternatives |
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Disclaimer: This research has been collated from a variety of authoritative sources. We welcome your feedback at [email protected].
Frequently asked questions
- Which is better, Four or Fattmerchant?
- Four edges out the other on user ratings (4.6 vs 3.9). That said, the best pick depends on your use case — use the comparison tables above to evaluate each dimension.
- Do Four and Fattmerchant offer a free trial?
- Neither Four nor Fattmerchant currently lists a free trial.
- What is the starting price of Four vs Fattmerchant?
- Four starts at Contact for pricing. Fattmerchant starts at $49 /Month.
- What are the top alternatives to Four?
- Top alternatives to Four include MagicPay, Payfirma, DusuPay, Credit Key, Blackthorn Payments.
- What are the top alternatives to Fattmerchant?
- Top alternatives to Fattmerchant include Merchant One, Heartland Payment Processing, Shift4 Payments, Global Payments, PaymentSpring.