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List of the Best Payment Processing Software in 2026

Rajat Gupta
Researched and Edited by Rajat Gupta
Rajat Gupta

Researched and Edited by Rajat Gupta

Last updated: · How we review

Editor's Summary · Payment Processing Software

Klarna dominates by volume with 154,488 ratings at 4.1/5, driven by global scale across consumer-facing checkout flows and buy-now-pay-later installment options, priced on quotation for merchant accounts. Balance draws strong satisfaction at 4.5/5 across 20,705 ratings and is particularly used by B2B marketplaces needing net terms, invoicing, and credit workflows built directly into the checkout experience. Opayo scores 4.7/5 across 4,139 ratings on a subscription model and is a consistent pick for UK-based merchants that need PCI-compliant card processing with predictable monthly costs.

Payment processing software handles the end-to-end movement of funds between buyers and sellers, covering authorization, settlement, fraud screening, and reconciliation across card, digital wallet, and ACH payment methods. Core buyers are e-commerce operators, marketplace platforms, and finance teams at mid-market companies managing multi-currency or cross-border transactions with complex settlement requirements.

Quick picks for Payment Processing Software

  • Best overallKlarna
  • Best for B2B marketplaces with net termsBalance
  • Best for UK merchants on subscription pricingOpayo

Who gets the most from Payment Processing Software

  • 1Finance managers at subscription-based service companies evaluating secure and scalable payment solutions
  • 2Payment operations leads at e-commerce platforms needing multi-channel payment acceptance and integration
  • 3Sales directors at retail businesses seeking versatile payment methods including mobile and POS terminals
How to choose Payment Processing Software

If you prioritize security and scalability, filter by products with strong encryption and high availability features. For businesses requiring multi-channel payment acceptance, sort by those supporting diverse payment types like mobile, POS, and online. When transparency is key, filter by Free Trial or publicly available pricing, though most top products use quotation-based pricing.

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Showing 21-40 out of 52

PayJunction - Payment Processing Software

PayJunction

Streamline payments with secure, 24/7 support.

Best for: SMB teams · Mid-market · Enterprise

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Add to compare

What is PayJunction?

PayJunction is a modern, enterprise-class, multi-channel payment processing software. It comes in a SaaS (Software as a Service) model for subscription-based revenue streams and with an easy to install on-premise version for single processors or mini-merchant banks. PayJunction is secure, ...

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PayJunction offers custom pricing plan

PaymentSpring - Payment Processing Software

PaymentSpring

Secure payments made simple.

Best for: SMB teams · Mid-market · Enterprise

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What is PaymentSpring?

PaymentSpring is a leading provider of Payments Solutions that enable merchants to accept credit & debit payments with ease. With its robust Feature-Rich Software, industry-applicable Support, competitive Pricing and a promising Growth Strategy, this secure payment processor offers an ultimate ...

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PaymentSpring offers custom pricing plan

Square Payments - Payment Processing Software

Square Payments

Simple and secure payments on-the-go.

Best for: SMB teams · Mid-market · Enterprise

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What is Square Payments?

Square Payments is a mobile and in-person payment processing solution used by small business owners — independent retailers, food vendors, and service providers — to accept card payments via smartphone or tablet without dedicated point-of-sale hardware. It combines a free card reader, simple ...

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Square Payments offers custom pricing plan

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Afterpay - Buy Now Pay Later Platforms

Afterpay

Split your payments, expand your possibilities.

Best for: SMB teams · Mid-market · Enterprise

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What is Afterpay?

Afterpay enables customers to acquire what they need and want, while simultaneously building strong financial wellbeing and managing their expenses, by splitting the payments up over four installments, for online and in-store purchases. This innovative solution is dedicated to granting our ...

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Afterpay offers custom pricing plan

Zip - Buy Now Pay Later Platforms

Zip

Unlock seamless payments and boost sales.

Best for: SMB teams · Mid-market

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What is Zip?

Zip's platform allows merchants to enjoy increased conversion rates, stabilized customer loyalty, and no-delay payments. It's simple to set up without API integration required, offering compatible solutions with WooCommerce, Shopify, BigCommerce, and more. Experience complimentary, ...

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Zip offers custom pricing plan

Balance - Payment Processing Software

Balance

Streamline payments, maximize profits.

Best for: SMB teams · Mid-market · Enterprise

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What is Balance?

Balance is a B2B payment processing platform used by online merchants and marketplaces to support net terms, milestone-based billing, and flexible payment options at checkout — capabilities that standard consumer payment processors do not handle natively. It solves the problem of business ...

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Balance offers custom pricing plan

What buyers evaluate in Payment Processing Software
Range of supported payment methods including credit cards, mobile wallets, POS, and phone/mail orders
Security features specific to payment processing such as encryption standards and compliance with financial regulations
Scalability and reliability of the platform to handle high transaction volumes and international payments
Privacy - New SaaS Software

Privacy

Protect your finances with secure virtual cards.

Best for: SMB teams · Mid-market · Enterprise

Try for Free

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What is Privacy?

Protect your finances and personal information with Privacy.com. Keep your real card info safe by creating separate virtual cards per payment, setting custom settings for each card for increased security. Get exactly what you need in no time with 1-click virtual card creation. Effortlessly take ...

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Starts from $10/Month, also offers free forever plan

Przelewy24 - Payment Processing Software

Przelewy24

Effortless payment processing for modern businesses.

Best for: SMB teams · Mid-market · Enterprise

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What is Przelewy24?

Przelewy24 is a multichannel payment processing software with a single, unified platform. It gives you the ability to present modern payment techniques to your customers, and provides all the tools to support online channels. We simplify the way you process transactions and provide 24/7 ...

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Przelewy24 offers custom pricing plan

Stripe Payments - Payment Processing Software

Stripe Payments

Seamless payments, anytime, anywhere.

Best for: SMB teams · Mid-market · Enterprise

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What is Stripe Payments?

Stripe Payments is the most powerful and flexible way to accept payments on the web. It is a simple way to accept credit cards on your website, in your mobile app, or wherever payments are made.  In addition to accepting payments online, Stripe provides you with all the tools you need to ...

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Stripe Payments offers custom pricing plan

Payline Data - Payment Processing Software

Payline Data

Streamline your payments, with confidence.

Best for: SMB teams · Mid-market · Enterprise

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What is Payline Data?

Payline Data is an integrated interchange-plus payment processing software that offers a proven payment solution that can scale from start-up to small and mid-sized businesses to large corporate enterprises. The intuitive interface improves tracking and managing of your payment processing ...

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Payline Data offers custom pricing plan

Sezzle - Buy Now Pay Later Platforms

Sezzle

Empowering budget-friendly purchases, hassle-free.

Best for: SMB teams · Mid-market · Enterprise

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4.4

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What is Sezzle?

Sezzle is an accredited B Corp that simplifies the payment process for buyers with budget plans and finance options with absolutely no fees or interest! Customers can easily integrate Sezzle with renowned platforms, like Shopify Plus, WooCommerce and more, to improve sales and gain new ...

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Sezzle offers custom pricing plan

MagicPay - Payment Processing Software

MagicPay

Unlock the power of seamless payments and increase sales.

Best for: SMB teams · Mid-market

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What is MagicPay?

A complete online payment processing and marketing platform, MagicPay is everything you need to start and run a successful business immediately. Our secure, robust payment gateway technology enables merchants to set up online shop fronts and accept all major credit cards, cryptocurrencies and ...

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MagicPay offers custom pricing plan

Affirm - Buy Now Pay Later Platforms

Affirm

Empowering financial freedom for all.

Best for: SMB teams · Mid-market · Enterprise

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What is Affirm?

Affirm is a revolutionary financial service employing advanced technology to create disruption in the industry. We put customers first by offering financing solutions that are simple, straightforward and free of hidden charges. Our Affirm for Merchants program arms business owners with the ...

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Affirm offers custom pricing plan

LEVELSET - New SaaS Software

LEVELSET

Streamline payments and get paid with ease

Best for: SMB teams · Mid-market · Enterprise

Start Free Trial

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watch-demo

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What is LEVELSET?

Levelset provides contractors and suppliers with cloud-based tools to manage payments and take the stress out of the process. With Levelset, users can exchange necessary payment documents like lien waivers, pay applications, and preliminary notices to have a clear understanding of everyone ...

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Free TrialTry Free →·

Starts from $29/recipient when monthly, also offers free forever plan

Heartland Payment Processing - Payment Processing Software

Heartland Payment Processing

Efficient payment processing for your business.

Best for: SMB teams · Mid-market

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What is Heartland Payment Processing?

Heartland Payment Processing software was designed with convenience in mind. A "point of sale payment processing" system, it offers the ability to run a business without having to purchase bulky expensive equipment or hire a pricey staff. The software's date and time stamp can record customer ...

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Heartland Payment Processing offers custom pricing plan

Merchant One - Payment Processing Software

Merchant One

Efficient, secure payment processing for any business.

Best for: SMB teams · Mid-market · Enterprise

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What is Merchant One?

Merchant One Payment Processing Software is the easiest cloud-based solution on the market today. Merchant One fuses together the ease of a POS system with powerful processing and shopping cart functionality. It is one payment processing software allows you to quickly and easily setup and ...

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Merchant One offers custom pricing plan

Fattmerchant - Payment Processing Software

Fattmerchant

Revolutionize your business transactions with Fattmerchant.

Best for: SMB teams · Mid-market · Enterprise

See Plans & Pricing

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What is Fattmerchant?

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 effective rates for businesses processing higher payment volumes. It ...

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Starts from $49/Month

Libeo - New SaaS Software

Libeo

Streamline your invoices, simplify your cash flow.

Best for: SMB teams · Mid-market · Enterprise

Try for Free

Add to compare

What is Libeo?

Libeo is the go-to solution for businesses looking to streamline their invoice and payment processes. As Europe's leading B2B payments platform, Libeo offers convenience and efficiency with its centralized platform. Say goodbye to tedious and error-prone manual processing, as Libeo digitizes ...

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Libeo offers custom pricing plan

SwipeSimple - Payment Processing Software

SwipeSimple

Effortless payments for small businesses.

Best for: SMB teams · Mid-market

Get Pricing Details

4.3

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watch-demo

Watch Demo

What is SwipeSimple?

SwipeSimple is a software platform designed to make digital payments for small businesses effortless and efficient. With built-in customization tools, merchants can quickly adjust tax rates, add items to the cart, and connect peripheral devices via USB to get going. With SwipeSimple's fully ...

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SwipeSimple offers custom pricing plan

Laybuy - Buy Now Pay Later Platforms

Laybuy

Shop now, pay later with ease.

Best for: SMB teams · Mid-market · Enterprise

Get Pricing Details

Add to compare

What is Laybuy?

Laybuy lets you get the purchases you want now and pay in six instalments with no interest! No more waiting - this stress-free payment plan is a great option for those that want to shop and pay later. Unlike buy now, pay later services, you'll get full protection from consumer laws with Laybuy, ...

Read more about Laybuy

Laybuy offers custom pricing plan

Disclaimer: This research has been collated from a variety of authoritative sources. We welcome your feedback at [email protected].

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