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Merchant One vs. Square Comparison

Which payment processor should you choose for your business: Merchant One or Square?

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Written by: Jennifer Dublino, Senior WriterUpdated Jun 09, 2025
Shari Weiss,Senior Editor
Business.com earns commissions from some listed providers. Editorial Guidelines.
Merchant One logo
Editor's Rating8.9/10
Square logo
Editor's Rating8.4/10
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Merchant One and Square are two of the best credit card processors out there, but which is better? Below, we compare these two payment processors side by side to help you determine which is best for your business.

Merchant One vs. Square

Merchant One vs. Square Highlights 

 

Merchant One

Square

Monthly fee

$13.95 per month, plus possible early-termination and PCI compliance fees

Free for basic plan; more advanced functionality costs between $29 and $79 per month

Payment processing cost

  • Interchange-plus pricing
  • 0.29% to 1.55% for card-present transactions
  • 0.29% to 1.99% for card-not-present transactions
  • Card-present transactions 2.6% + $0.10 
  • Card-not-present transactions: 
  • Square Invoices or Square Online Store 2.9% + $0.30
  • Square Online Store Premium 2.6% + $0.30
  • Keyed-in and recurring card-on-file transactions  3.5% + $0.15

Ease of use (software)

Easy and intuitive

Easy and intuitive; industry-specific versions available for restaurants and retailers

POS system (hardware)

Third-party hardware, including Clover products that can be used with other processors

Attractive and functional, proprietary hardware incompatible with other processors

Customer service

24/7 phone support, plus email and text-based support; dedicated account manager

Phone support weekdays between 6 a.m. and 6 p.m. PT; email support response 24-48 hours; chat support seven days a week; social media support and online knowledge base also available

Who Is Merchant One for? 

Merchant One is a good choice for businesses that:

  • Need POS system hardware: Although it doesn’t have a POS system of its own, Merchant One offers third-party POS hardware, including Clover.
  • Are on a tight budget: Since Merchant One has interchange plus pricing, its processing rates are lower than most payment processors we reviewed. There is no per transaction fee, so it is less expensive for high- and low-volume businesses.
  • Want exceptional customer service: We were impressed with the quality of customer service Merchant One offered, including 24/7 support and a dedicated account manager.
  • Have modest credit scores: Merchant One boasts a 98% approval rate, making it a good choice for business owners with less-than-perfect credit.

Learn more in our comprehensive review of Merchant One.

Merchant One FD-130 card reader

The FD-130 credit card reader is one of several readers that Merchant One gives new merchants for free when they open a merchant account. (Source: National Bankcard)

Who Is Square for? 

Square is a good choice for businesses that:

  • Want to get started quickly and easily: Square doesn’t require a credit check or documentation for businesses to get started processing credit cards. That makes it a great choice for new businesses and startups without much transaction history.
  • Don’t want to pay monthly fees: Square’s basic plan comes with no monthly fees. However, there are higher tier plans that start at $29 per month which offer advanced POS system functionality.
  • Want an included POS system: If you want a top POS system, it is included in the basic plan for no monthly fee. Other features, such as inventory management, marketing, and payroll and employee scheduling, cost extra.
  • Want user-friendly, cost-effective hardware: The industry-specific POS options provide a robust solution to retail, restaurants and appointment-based businesses at a price lower than other payment processors. 

Learn more in our complete review of Square.

Did You Know?Did you know
As of 2024, about 68% of small businesses currently use POS systems. Working with a payment processor that includes a POS system and equipment, like Square, is a good way to get both services in one convenient bundle.

Merchant One vs. Square Comparison

Here’s how Merchant One and Square stack up on important criteria when choosing a payment processor.

Monthly fee

Merchant One

Merchant One’s monthly fee is currently $13.95. While reasonable given its low processing fees, even this small fee can hinder startup businesses that have little revenue coming in. 

Square

Square’s base plan has no monthly fee and includes a lot of functionality, including general POS, invoicing, virtual terminal, online checkout and employee management. Other payment processors typically charge a fee for these features. 

Square does offer higher tiers and add-ons for additional fees. These include:

  • Customer loyalty program: $45 per month
  • Email marketing: $15 per month
  • Payroll: $35 per month plus $6 per employee
Best Monthly Fee
Square
Square’s basic plan with no monthly fee has plenty of features and will work for any kind of business.

Payment processing costs

Merchant One

Merchant One has low interchange-plus pricing. This means there is a small upcharge on top of the interchange rate, which is set by and paid to each type of credit card provider (Visa, Mastercard, Discover, etc.).

Merchant One’s upcharges (the “plus” in interchange-plus) are as follows:

  • Card present transactions: Ranges from 0.29% to 1.55%
  • Card-not-present transactions: Ranges from 0.29% to 1.99%

Many other credit card processors, including Square, include the interchange rate and their markup into one combined rate, which is generally higher than Merchant One’s interchange-plus. 

Did You Know?Did you know
Interchange rates vary based on several factors, including card brand (Visa or Mastercard), the type of business, whether it is a credit or a debit card, and whether the card is a specialized card, such as a business credit card or a rewards card.

Square

Square’s payment processing rate depends on both whether the card is physically present, which is standard, and on the Square service that is used. 

  • Card present transactions: 2.6% plus $0.10 per transaction. This is the rate regardless of which credit card is used, what type of business it is or any special card characteristics.
  • Card-not-present transactions: 
    • For Square Invoices or Square Online Store, the rate is 2.9% plus $0.30 per transaction.
    • For Square Online Store Premium, you get a lower rate of 2.6% plus $0.30 per transaction. 
    • For any keyed-in transactions or card-on-file recurring charges, the rate is 3.5% plus $0.15 per transaction.
Best Payment Processing Costs
Merchant One
Merchant One’s interchange-plus pricing is often lower than flat-rate pricing for the processing fees charged by other credit card processors.

Ease of use

Merchant One

We found Merchant One’s back-end software is easy to use. It has clear labeling of sections and functions, allowing you to run reports, use the virtual terminal and add customer information. 

A benefit of Merchant One is that it offers Clover POS systems, which is a highly user-friendly system. For more details on all the platform offers, check out our review of Clover.

Merchant One Clover Products

Merchant One promotes its Clover products but is also compatible with other readers. (Source: Merchant One) 

Square

Square’s software is integrated with its general POS system, so you have everything in one interface. We found it intuitive, requiring little to no training to navigate effectively. 

In addition, Square easily integrates with many popular e-commerce platforms, making it a suitable choice for online businesses.

Square interface

The Square interface is sleek and simple to navigate. (Source: Square) 

Best for Ease of Use
Square
Square offers an intuitive user experience and integrates seamlessly with e-commerce platforms.

POS system hardware

Merchant One

Merchant One offers third-party POS system hardware, but especially touts its partnership with Clover. With Clover hardware, you’ll get:

  • Nice-looking and fully functional POS system. 
  • Choice of fixed POS terminal, mini tablets and handheld devices.
  • The ability to accept digital wallets, such as Apple Pay.
  • The ability to process NFC payments.
  • The ability to accept PIN entries for debit cards.

Clover equipment is also compatible with multiple payment processors, which so you can switch in the future without repurchasing equipment.

Square

Square’s POS system and equipment are just as attractive and functional as Clover’s. It combines all payment processing functions, like the virtual terminal and reporting, with the other features. 

However, Square’s POS system hardware is not compatible with other payment processors, so if you switch in the future you’ll need new hardware too.

Square card reader

Square offers a sleek customer-facing interface. Source: Square 

Best POS System Hardware
Tie
Both Square and Merchant One offer useful POS system hardware, including mobile terminals.

Customer service 

Merchant One

Merchant One provides 24/7 phone support plus email and text-based support

Most importantly, though, Merchant One gives each merchant a dedicated account manager. We like that each customer has a single point of contact to streamline their communication with the company, resolving problems and answering questions more quickly.

Square

Square has limited hours for phone support: Monday through Friday, 6 a.m. to 6 p.m. PT. Square support is not available on weekends or early morning hours on the East Coast. 

Square also offers email support, with a response expected between 24 and 48 hours, and online chat support seven days a week, from 6 a.m. to 6 p.m. PT. 

Support is also available over social media, and there is an online knowledge base for self-guided learning and troubleshooting.

Best for Customer Service
Merchant One
Merchant One is the clear winner for customer service thanks to its dedicated account managers and 24/7 phone support.

Merchant One vs. Square Summary

Merchant One: Best for Established and High-Volume Businesses 

Due to its interchange-plus pricing, Merchant One is more cost-effective for high-volume businesses who process payments frequently. 

Merchant One also offers a dedicated account rep that can provide a quick resolution to any issues, minimizing disruptions and downtime that may take a toll on a company’s bottom line. 

The affordable pricing paired with the exceptional customer service is a great combination for established ventures in virtually any industry. 

Did You Know?Did you know
Increases to interchange fees by card issuers like Visa and Mastercard could cost merchants more than $500 million annually.

Square: Best for Startup Retailers and Restaurants

Startups and newer businesses, especially those in the retail or restaurant space, can get started quickly with Square. All that’s needed is to fill out an easy application form and wait for approval that’s essentially guaranteed. 

Square offers a free plan, which comes with plenty of useful features plus affordable, industry-specific POS systems for retail and restaurant businesses. 

Since startups can always upgrade to a paid plan once their needs become more advanced, Square is a highly scalable solution perfect for new businesses on a budget.

FAQs

Square payouts come in one to two business days for transactions recorded between Monday and Thursday. You also have the option to get an immediate payout for a 1.5% fee. With Merchant One, payouts happen in two to three business days. Next-day deposits are available for an additional fee.
Square charges a flat rate for all merchants. Merchant One’s processing rate depends on a variety of factors, such as monthly volume, payment types accepted, ticket sizes and equipment needed. It also varies according to the interchange rate for the particular card used.
Both Merchant One and Square are good choices if you are in an industry that is considered high-risk. They both have high acceptance rates, but Square doesn’t ask for documentation when you apply for a merchant account.
Square offers a free plan that may be appropriate for startups and newer businesses. However, for those looking for more advanced features, Merchant One is less expensive overall. While Merchant One’s plan costs $13.95 per month, Square’s paid plans range from $29 to $79 per month. Not only is Merchant One’s monthly fee much lower, but it also offers more competitive processing rates.
Square’s mobile app is available on iOS and Android devices. Merchant One does not currently have a mobile app.

Anna Baluch contributed to this article. 

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Written by: Jennifer Dublino, Senior Writer
Jennifer Dublino is an experienced entrepreneur and astute marketing strategist. With over three decades of industry experience, she has been a guiding force for many businesses, offering invaluable expertise in market research, strategic planning, budget allocation, lead generation and beyond. Earlier in her career, Dublino established, nurtured and successfully sold her own marketing firm. At business.com, Dublino covers customer retention and relationships, pricing strategies and business growth. Dublino, who has a bachelor's degree in business administration and an MBA in marketing and finance, also served as the chief operating officer of the Scent Marketing Institute, showcasing her ability to navigate diverse sectors within the marketing landscape. Over the years, Dublino has amassed a comprehensive understanding of business operations across a wide array of areas, ranging from credit card processing to compensation management. Her insights and expertise have earned her recognition, with her contributions quoted in reputable publications such as Reuters, Adweek, AdAge and others.
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