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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 Writer
Shari Weiss editor headshot
Editor verified:
Shari Weiss,Senior Editor
Last Updated Jun 09, 2025
Business.com earns commissions from some listed providers. Editorial Guidelines.
Square logo
Editor's Rating9.1/10
Merchant One logo
Editor's Rating8.9/10
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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 fees; PCI compliance costs are typically included

$0 (Free); $49 per location (Plus); $149 per location (Premium)

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
  • In-person transactions: 2.6% + $0.15 (Free); 2.5% + $0.15 (Plus); 2.4% + $0.15 (Premium)
  • Online transactions and invoices: 3.3% + $0.30 (Free); 2.9% + $0.30 (Plus and Premium)
  • Manually entered and card-on-file transactions: 3.5% + $0.15

Ease of use (software)

Easy and intuitive

Easy and intuitive; industry-specific features available for restaurants, retailers and other businesses

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

 Chat and email support; phone support 6 a.m.–6 p.m. PT Monday through Friday for the first 90 days on Free and ongoing with Plus; 24/7 phone support with Premium; Support Center, Seller Community and video resources 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 has a quick online application, with accounts often approved instantly. Businesses can start accepting payments once their accounts are activated.
  • Don’t want to pay monthly fees: Square’s Free plan has no monthly subscription fee. Businesses that need more advanced features can upgrade to Plus or Premium.
  • Want an included POS system: Square’s Free plan includes its POS software at no monthly cost. Other features, such as inventory management, marketing and payroll, are also available.
  • Want user-friendly, cost-effective hardware: Square offers user-friendly POS hardware for retail, restaurant and appointment-based businesses.

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 Free plan has no monthly subscription fee and includes plenty of functionality, including POS software, invoicing, a virtual terminal and online selling tools. Businesses that need more advanced features can upgrade to Plus for $49 per location per month or Premium for $149 per location per month.

Plus includes additional features such as staff management, loyalty tools, email and text marketing and advanced POS features. Premium adds more advanced tools, 24/7 phone support and Square’s lowest standard in-person processing rate. Square also offers separately priced services and add-ons, including payroll.

  • 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 Free plan has no monthly subscription fee and includes a wide range of payment and business management features.

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 rates vary based on the transaction type and subscription plan your business has.

  • Card-present transactions: In-person rates are 2.6 percent + $0.15 with Free, 2.5 percent + $0.15 with Plus and 2.4 percent + $0.15 with Premium.
  • Card-not-present transactions:
    • Online transactions and invoices cost 3.3 percent + $0.30 with Free and 2.9 percent + $0.30 with Plus and Premium.
    • Manually entered and card-on-file transactions cost 3.5 percent + $0.15 with all three plans.
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.

Square

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

In addition, Square integrates with many popular e-commerce platforms, making it a suitable choice for businesses that want to set up an online store.

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, so you can switch providers in the future without repurchasing equipment.

Square

Square’s POS system and equipment are just as attractive and functional as Clover’s. It includes payment processing features, such as a virtual terminal and reporting, along with other business tools.

However, Square’s POS hardware is not compatible with other payment processors, so if you switch processors 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 typically 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 offers chat and email support on all plans. Phone support varies by subscription: Free customers receive phone support Monday through Friday from 6 a.m. to 6 p.m. PT for the first 90 days, Plus customers receive phone support during those hours on an ongoing basis and Premium customers receive 24/7 phone support.

Square also provides online support resources, including its Support Center, Seller Community and video tutorials.

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. The online application is straightforward, and accounts are often approved instantly.

Square offers a Free plan with no monthly subscription fee, along with user-friendly POS hardware and industry-specific features for retail and restaurant businesses.

As their needs become more advanced, businesses can upgrade to Square’s Plus or Premium plan for additional features. This makes Square a scalable option for startups that want to keep their initial costs low.

FAQs

Square offers standard transfers as soon as the next business day. Instant transfers are also available for a 1.95 percent fee. With Merchant One, payouts happen in two to three business days. Next-day deposits are available for an additional fee.
Square publishes standard flat-rate processing fees that vary by subscription plan and transaction type. Businesses processing more than $250,000 annually may qualify for custom pricing. 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.
Merchant One works with some high-risk businesses, but Square doesn't support certain high-risk products, services and industries. Businesses should review each processor’s restrictions before applying.
Square offers a Free plan with no monthly subscription fee, while its paid plans start at $49 per location per month. Merchant One charges $13.95 per month and uses interchange-plus processing rates. Which platform costs less will depend on factors such as your processing volume and transaction types.  
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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author image
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.
Square logo
Editor's Rating9.1/10
Merchant One logo
Editor's Rating8.9/10