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 121-135 out of 135

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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 ...
Read more about Square PaymentsSquare Payments offers custom pricing plan

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What is GoCardless?
venmo for Business is a powerful next-generation solution that provides merchants with the ability to process credit and debit cards, as well assist with customer service, sales, marketing, and informational data. Based upon a robust and powerful platform. It is a simple, modern approach to ...
Read more about GoCardless
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What is WePay?
WePay is an all-in-one payment processing software. The platform enables merchants of all sizes, from small to large, to process credit and debit cards, online and offline payments in a number of different countries. We Pay can integrate with a variety of platforms that include Salesforce ...
Read more about WePay
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- Trusted by 250K+ software buyers every month
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Chargezoom
Effortless payment processing for your business.
Best for: SMB teams · Mid-market · Enterprise
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What is Chargezoom?
ChargeZoom is a payment processing solution that makes accepting credit card payments easy. Our advanced online software and mobile app allow our clients to process payments from their own websites and mobile apps, using highly secure methods of encryption and proprietary processes. ChargeZoom ...
Read more about ChargezoomStarts from $20/Month, also offers free forever plan

Genome Wallet
Streamline your e-commerce payments seamlessly.
Best for: SMB teams · Mid-market · Enterprise
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What is Genome Wallet?
Genome is an all-in-one financial platform offering online IBAN accounts, multi-currency wallets, SEPA Instant transfers, SWIFT payments, Visa cards, and secure merchant payment solutions. Business accounts Open dedicated online business IBAN accounts for your company with a fully digital ...
Read more about Genome WalletStarts from 10/month when Billed Monthly

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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 ...
Read more about BalanceBalance offers custom pricing plan

Amazon Pay
Convenient payment processing for your Amazon sales.
Best for: SMB teams · Mid-market · Enterprise
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What is Amazon Pay?
Amazon Pay is a payment processing service for sellers on the Amazon marketplace that withdraw funds directly into your bank account. It is easy to use and works seamlessly with the millions of global Pay with Amazon customers already using the service for products and in-app purchasing in ...
Read more about Amazon PayStarts from $0.30

Venmo for Business
Streamlining business transactions, one click at a time.
Best for: SMB teams · Mid-market · Enterprise
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What is Venmo for Business?
Venmo for Business is a powerful next-generation solution that provides merchants with the ability to process credit and debit cards, as well assist with customer service, sales, marketing, and informational data. Based upon a robust and powerful platform, Venmo is a Software-as-a-Service ...
Read more about Venmo for BusinessVenmo for Business offers custom pricing plan

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What is Opayo?
The Opayo Payment Processing Software is a cloud-based solution offered to merchants that provide you with the tools to accept all forms of payment online. With powerful features such as automated recurring billing and advanced reporting, you can breathe easier knowing your business is ...
Read more about Opayo
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What is NuovoPay?
NuovoPay is a payment processing software as a service (SaaS) that allows merchants to accept credit cards from the comfort of their desktop. This service offers tiered pricing options, no monthly or start-up fees, a PCI certified merchant account, and payouts via either PayPal or direct check ...
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Limonetik
Effortlessly process payments and manage your business.
Best for: SMB teams · Mid-market · Enterprise
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What is Limonetik?
Limonetik is the software that you can use to process payments and manage your business. The software will help you collect info from customers and allows you to process credit cards. The customers will be able to view their statements online, download invoices and export their statements so ...
Read more about LimonetikLimonetik offers custom pricing plan

PayOp
Seamless payment processing for simplified transactions.
Best for: SMB teams · Mid-market · Enterprise
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What is PayOp?
PayOp is an integrated payment processing software solution designed to be used without a complicated layered technology infrastructure. It turns your debit and credit card terminal into a complete point-of-sale (POS) system by leveraging the framework, processes, and personnel you already have ...
Read more about PayOpPayOp 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 PayU?
PayU is an online payment processing platform used by e-commerce merchants and online businesses in emerging markets — particularly India, Eastern Europe, and Latin America — to accept credit and debit card payments from customers. It provides a payment gateway and merchant account in a single ...
Read more about PayUPayU offers custom pricing plan

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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 ...
Read more about Stripe PaymentsStripe Payments offers custom pricing plan
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