Best Payment Processing Software

Whop Payments is a specialized payment infrastructure designed to help entrepreneurs, creators, and global enterprises sell digital products, such as courses, communities, software, and livestreams, with maximum efficiency. Functioning as a comprehensive "payments stack," it replaces the need for complex, multi-gateway setups by orchestrating transactions to the providers most likely to accept them. This intelligent routing and retry logic helps businesses increase revenue by an estimated 6-11% by reducing failed payments. Beyond processing, Whop Payments offers a robust merchant ecosystem that includes a no-code store builder, affiliate management, and dispute resolution. It empowers sellers to reach a global audience by accepting over 100 payment methods (including Crypto and Buy Now, Pay Later options) and facilitating payouts in over 240 territories via ACH, Venmo, CashApp, and more. Pricing: Platform Fee: Free to start with no monthly subscription. Transaction Fee: 2.7% + $0.30 per transaction. Read Whop Payments Reviews

Chase Payment Solutions, part of JPMorgan Chase, provides merchant services including credit card processing, point-of-sale systems, and online payment gateways for US businesses. As both a payment processor and the acquiring bank, it can offer faster payouts with fewer intermediaries. Pricing is transaction-based, with tap, dip, or swipe payments at 2.6% plus 10 cents, manually keyed transactions or payment links at 3.5% plus 15 cents, and online orders at 2.9% plus 25 cents, with no long-term contract required.

Businesses using a Chase Business Complete Banking account that process over $2,000 per month in card payments can have monthly service fees waived, and same-day deposits are included at no extra cost. Chase also offers custom pricing for higher-volume merchants and sells a range of card readers and POS terminals separately, along with fraud monitoring, reporting, and analytics tools.

Amazon Pay is a checkout service that allows the hundreds of millions of existing Amazon customers to use their stored payment methods and shipping addresses to buy from third-party merchant websites without creating a new account. It charges a straightforward per-transaction fee with no monthly, setup, or termination fees, and rates automatically decrease for merchants with higher monthly processing volume.

Merchants integrate Amazon Pay into their own checkout flow, and premier partners include Shopify and WooCommerce for easier setup. The service includes Amazon's fraud and chargeback protection, and in some markets supports Buy Now Pay Later options. It is well suited to ecommerce businesses of any size that want to reduce checkout friction by leveraging Amazon's trusted brand and stored customer data.

Helcim is a Canadian payment processing company that provides credit card, debit, and ACH acceptance for in-person, online, and mobile businesses. It uses interchange-plus pricing, meaning merchants pay the wholesale card network rate plus a small transparent markup that automatically decreases as processing volume grows, with no monthly fees, contracts, or PCI compliance fees.

The platform bundles a free point of sale app, online invoicing, recurring billing, a virtual terminal, and payment links at no extra software cost. Helcim also sells its own card readers and smart terminals and supports ACH/EFT payments in the US and Canada. It is aimed mainly at small and medium sized businesses that want predictable, low processing costs without long term commitments.

Stax (formerly Fattmerchant) is a US payment processing company that uses a subscription pricing model instead of taking a percentage markup on every transaction. Merchants pay a flat monthly membership fee based on annual processing volume, plus a small flat fee per swiped or keyed transaction, with no additional markup on the underlying interchange rate.

The platform includes a mobile card reader, virtual terminal, invoicing, recurring billing, reporting, and access to 200+ integrations through Stax Connect. It is best suited to established small and medium businesses processing at least a few thousand dollars a month, since the subscription model becomes more cost-effective at higher volumes.

Stripe is a payment processing platform that lets businesses accept credit cards, debit cards, and dozens of other payment methods online, in person, and across borders through a single API. It is used by companies ranging from small online stores to large public companies, combining a checkout and billing product suite with tools for fraud prevention, tax calculation, and marketplace payouts.

Beyond core payments, Stripe offers Connect for platforms and marketplaces, Radar for machine learning fraud detection, Terminal for in-person card readers, and Billing for subscription management. Pricing is pay as you go with no monthly fee for standard accounts, and large businesses can negotiate custom volume-based rates.

PayPal is a widely used online payment platform that lets individuals and businesses send and receive money, accept card payments, and manage checkout on websites and mobile apps. A PayPal Business account is free to open with no monthly fee, and merchants pay a percentage plus a fixed fee per transaction depending on how the payment is taken.

PayPal Business supports invoicing, buy-now buttons, subscription billing, Pay Later options for customers, and in-person payments through its Zettle card readers. It also provides seller protection against certain chargebacks and disputes, multi-currency support for international sales, and integrations with major ecommerce platforms such as Shopify and WooCommerce.

Authorize.Net is a payment gateway that lets businesses accept credit cards, debit cards, and eChecks online, over the phone, and in person through a virtual terminal. It is one of the longer-established gateways in the US market and is commonly paired with a separate merchant account or bundled with one through its All-in-One plan.

Authorize.Net charges a flat monthly gateway fee plus per-transaction fees that vary by plan, and offers recurring billing, a Customer Information Manager for storing payment profiles, digital invoicing, and an Advanced Fraud Detection Suite with more than 200 configurable rules. It integrates with many shopping carts and ecommerce platforms and provides 24/7 support.

Worldpay is a global payment processing provider that handles card, ACH, mobile, and in-store transactions across more than 140 countries and over 300 local payment methods. It serves small businesses through enterprise merchants with tools for accepting payments, fraud protection, payout and multi-currency management, and embedding payments into software platforms and marketplaces.

As of January 2026, ownership of Worldpay changed: Global Payments completed its acquisition of Worldpay, while FIS sold its stake in Worldpay and instead acquired Global Payments' issuer solutions business. Worldpay no longer publishes standard pricing; rates are quoted per merchant based on volume, industry, and risk, typically using interchange-plus pricing.

Adyen is a global payments platform built for large and fast-growing enterprises that need to accept payments across online, in-store, and mobile channels through a single unified system. It supports more than 100 payment methods worldwide, including cards, digital wallets, bank transfers, and buy now pay later options, with local acquiring in dozens of countries.

Adyen uses transparent interchange-plus pricing rather than flat blended rates, charging a small fixed processing fee plus the underlying card scheme costs and its own markup, with no published flat-rate plans. The platform also includes Adyen for Platforms for marketplaces, real-time risk and fraud management, and unified reporting that connects online and in-person sales data.