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 overall — Klarna
- Best for B2B marketplaces with net terms — Balance
- Best for UK merchants on subscription pricing — Opayo
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.
Showing 41-52 out of 52

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What is PayAnywhere?
PayAnywhere is payment processing software that enables you to accept secure payments anywhere on the web.. It offers the ability to take payments for goods and services through your mobile device or tablet, where you are. Businesses of any size can take advantage of PayAnywhere to process ...
Read more about PayAnywherePayAnywhere offers custom pricing plan

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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 LaybuyLaybuy offers custom pricing plan

QuickBooks Payments
Get paid faster with QuickBooks Payments.
Best for: SMB teams · Mid-market · Enterprise
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What is QuickBooks Payments?
QuickBooks Payments is a payment processing service that makes it easier for your customers to pay you. It's all online, 24/7, so you can immediately start receiving funds from your customers. There's an option to choose multiple payment solutions including credit card, debit card, electronic ...
Read more about QuickBooks PaymentsStarts from $12.50/Month

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Global Payments
Transforming payment processing for seamless transactions.
Best for: SMB teams · Mid-market · Enterprise
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What is Global Payments?
Global Payments offers full-service, in-house, state-of-the-art Payment Processing Software that's been designed to simplify credit card processing through one central solution. Its comprehensive feature set provides easy access controls and reconciliation for merchants' businesses while ...
Read more about Global PaymentsGlobal Payments offers custom pricing plan

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What is Swipesum?
Swipesum's PayFlow payment processing software is the perfect solution for small business owners who want to process credit and debit cards through their website or mobile app while keeping their overall costs low. Offering an easy-to-use, cloud-based platform with full accounting capabilities ...
Read more about SwipesumStarts from $25/analysis, also offers free forever plan

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What is Payfirma?
Payfirma's payment processing software empowers businesses of all sizes to accept payments quickly, securely and cost-effectively from anyone, anywhere. Payfirma allows you to make your business available 24/7, from virtually anywhere in the world.It is a payment processing solutions provider, ...
Read more about PayfirmaPayfirma offers custom pricing plan

Klarna
Shop smarter with seamless payments and financing.
Best for: SMB teams · Mid-market · Enterprise
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What is Klarna?
Klarna helps make shopping simpler and more enjoyable by allowing customers to track their purchases, make payments and log into their account with ease. With the goal of becoming the preferred way to shop around the world, it offers unique products and services in relation to payments, ...
Read more about KlarnaKlarna offers custom pricing plan

ACI Customer Communications Management
Effortless communication and payment solutions for satisfied customers.
Best for: SMB teams · Mid-market · Enterprise
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What is ACI Customer Communications Management?
ACI Customer Communications Management makes customer communication an easy task. This end-to-end platform enables you to develop and manage content suited to your business needs. It also provides the ability to personalize consent through its preference management tools. All range of channels, ...
Read more about ACI Customer Communications ManagementACI Customer Communications Management offers custom pricing plan

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What is iwocaPay?
iwocaPay is a B2B payment solution used by UK small business owners and their trade customers to offer flexible payment terms — including buy-now-pay-later options — at the point of invoice or checkout. It solves the problem of business buyers who delay payment due to cash flow constraints by ...
Read more about iwocaPayiwocaPay offers custom pricing plan

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What is Nuvei?
Nuvei is a cloud-based SaaS payment processing system for business that combines the power and flexibility of API-based transaction processing with the simplicity of traditional online Point-of-Sale (POS) systems. In addition to its flexible API, Nuvei supports familiar POS interfaces such as ...
Read more about NuveiNuvei offers custom pricing plan

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What is BluePay?
BluePay is a payment processing application that enables you to integrate various payment methods into your online or physical store. It supports authorization, capture and refunds and the ability to process customer payments directly on-site via a hardware key or by entering information on ...
Read more about BluePayBluePay offers custom pricing plan

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What is Satispay?
Satispay is an easy-to-use payment processing software that allows individuals and businesses to accept payments over the Internet in real-time and on their own terms. Satispay avoids the usual high fees of other services with no setup costs, no monthly fees, no surcharges, and no merchant ...
Read more about SatispaySatispay offers custom pricing plan
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