Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →There is no single best payment processing system for every business. For a U.S. small business seeking a straightforward mix of online and in-person sales, Square is a reasonable starting point; a larger or internationally active business combining online, in-person and in-app payments may want to evaluate Adyen. Stripe and PayPal are also candidates, depending on the checkout, integration and payment methods you need. Compare each provider against your own country, transaction mix, sales channels and total costs—not just a headline rate.
Which payment processor is right for your business?
Start with how your business actually takes payments. A solo seller sending invoices has different needs from a retailer with a checkout site and staffed registers, or a multinational business consolidating payments across markets. The providers below describe different product and pricing approaches; these are fit signals, not results of independent performance or conversion testing.
| Provider | Could be worth evaluating if you need | What to check before choosing |
|---|---|---|
| Square | A combined commerce and point-of-sale workflow, with options for online and in-person sales. | U.S. plan-specific transaction fees, available features, payout terms and any hardware needed for your workflow. Square says its Free plan has no monthly subscription cost; that does not mean payment processing is free. |
| Stripe | An online-first setup with developer tools, integration flexibility or a path to custom pricing. | Country-specific pricing, fees for the payment methods and products you use, and whether you need a developer or a custom integration. |
| PayPal | PayPal checkout, invoicing, a virtual terminal or an in-person payment route. | Which PayPal product will handle each transaction: its U.S. fee schedule separates checkout, card-present, keyed, QR, invoicing and virtual-terminal payments. |
| Adyen | A larger operation seeking to bring online, in-person and in-app payments, including international markets, into one integration. | Availability and local payment methods in your markets, the payment-method fees in addition to processing fees, and the scope and price of any other Adyen products. |
These descriptions reflect provider product and pricing pages accessed October 8, 2026. Availability, terms and prices can change, and U.S.-specific information is not a substitute for a quote or price schedule in another country.
What to compare before signing up
Build the comparison around the costs and workflows your business will use. Two processors’ advertised rates may cover different channels, payment methods or products, so they are not necessarily comparable.
#1 Best Overall
- With Square Terminal, you can ring up sales, accept payments, and print receipts, all with one device. Use it at the counter or ring up customers anywhere in your store.
- Accept all major credit and debit cards and pay one low rate with no hidden fees and no long-term contracts.
- Process chip cards in just two seconds.
- Get your money as soon as the next business day.
- Use it cordlessly with the built-in battery, designed to last all day.
Country, customers and payment methods
Confirm where your business is registered, where customers are located, which currencies you need, and whether buyers expect local payment methods. A provider’s product availability and rates can vary by market. Adyen describes global acceptance and local payment options, but you still need to confirm the specific markets and methods relevant to your business.
Sales channels and integration
List whether you sell through a website, in person, in an app, by invoice or over the phone. Then decide whether you need a hosted checkout, payment links, a plugin, a virtual terminal or API-level control. Square lists invoices, payment links and a virtual terminal among its hardware-free acceptance options; Stripe describes developer libraries and custom solutions; PayPal offers checkout, invoicing and a virtual terminal. Adyen describes one integration for online, in-person and in-app payments.
Transaction mix and total cost
Estimate your typical ticket, monthly volume, card-present versus keyed or online share, payment-method mix, refunds and chargebacks. Apply each provider’s fees to that mix. Include any subscription or add-on charges, hardware, currency conversion, chargeback costs, refund treatment and negotiated terms that apply to your account. A headline rate alone cannot establish which provider costs less for your business.
Payout timing and cash flow
Check when funds become available, what transfer options exist and whether faster transfers cost extra. Square says U.S. sellers can receive external bank transfers the next business day at no charge or use an instant transfer for a fee; timing can depend on the bank and account. Confirm current payout terms for your own market and account before relying on a particular schedule.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Rank #2
- Use the, easy-to-use, and customizable POS to get started.
- Accept contactless payments, chip cards, Apple Pay, and Google Pay from anywhere, with improved connectivity, extended battery life, and enhanced security. Pay one low rate for every tap or dip.
- No long-term commitments or contracts, no monthly fees- and with offline payments, keep taking payments for up to 24 hours.
- Safely and securely accepts payments anywhere. Plus, get data security, 24/7 fraud prevention, and payment-dispute management at no extra cost.
- Use the, easy-to-use, and customizable POS to get started.
Support, scale and operating complexity
Consider whether you need implementation help, multiple business entities, custom pricing, or a consolidated view across countries and channels. Stripe describes custom pricing for large payment volumes or unique business models. Square says U.S. businesses processing more than $250,000 annually may be able to discuss custom pricing, depending on factors including volume, average ticket and seller history. PayPal says established high-volume merchants may be eligible for custom rates or interchange-plus pricing. These are provider-specific qualifications, not guaranteed offers; request terms based on your operation.
How the four systems differ
Square: a practical starting point for some small businesses
Square describes a Free plan without a monthly subscription charge and offers online and in-person routes. Its pricing varies by plan, so compare the applicable fees against your actual volume and sales methods rather than assuming the Free plan has no transaction costs. Square lists invoices, payment links, a virtual terminal and Tap to Pay on supported iPhone and Android devices as options that do not require a separate card reader.
For a U.S. small business combining online and face-to-face sales, those features may make Square a useful system to evaluate. Whether it is a good fit depends on the checkout and POS workflow you need, the fees for your transactions and the terms available to your business.
Stripe: flexible online payments and custom options
Stripe describes standard pay-as-you-go pricing as well as custom packages for large payment volumes or distinctive business models. Fees depend on the payment method. Stripe says standard pricing has no setup or monthly fee, and notes that original processing, Connect and currency-conversion fees are not returned when a payment is refunded.
Rank #3
- Get your money as soon as the next business day.
- Get set up quickly with no long-term commitments. Download the Square Point of Sale app for free, create an account, and start taking payments anywhere.
- Run your business all in one place with the free Square Point of Sale app. Track your sales, manage inventory, accept tips, send receipts digitally, and more.
- Works with Apple devices with a Lightning connector.
Stripe may be worth comparing for an online-first business that values integration flexibility or could need custom pricing. The pricing page accessed October 8, 2026 redirected to a regional English page, so do not treat a rate displayed in one market as a universal Stripe price. Check the schedule for your country and products.
PayPal: choose the specific route, not a headline rate
PayPal’s U.S. fees page separates checkout, expanded checkout, card-present, keyed, QR, invoicing and virtual-terminal transactions. That matters because the applicable rate depends on the product and transaction type. PayPal also says established high-volume merchants may be eligible for custom rates or interchange-plus pricing.
PayPal can be a candidate if you want to offer PayPal at checkout or need its invoicing, virtual-terminal or in-person options. Model the fee schedule for each route you intend to use. The figures and eligibility on the cited fees page are specific to the United States and may change.
Adyen: evaluate for multi-channel or international operations
Adyen describes one integration for online, in-person and in-app payments, with global and local payment options, and positions its platform toward large enterprises. Its pricing page describes a fixed processing fee plus a fee determined by the payment method; other Adyen products are priced separately.
Free tools Windows power users keep installed
One-click scans. No signup required.
Rank #4
- Accept all major credit and debit cards and pay one low rate
- No hidden fees and no long-term contracts
- Mobile card reader that accepts payments anywhere & anytime
- Use the free SumUp App on your smartphone or tablet to start accepting transactions
- Simply pay 2.6% +10 per in-person transaction
That approach may merit evaluation for a larger or internationally active business seeking to consolidate payment operations. It does not establish that Adyen will be cheaper, suitable for every small seller, or available on the same terms in every market. Ask for a quote built around your channels, geographies, volume, average ticket and integration needs.
How payment processing works—and why the labels matter
A card payment usually passes through several parties. IDC’s 2024 assessment describes the processor as sending transaction data through card networks to the issuing bank for authorization. The issuer approves or declines the payment; the networks connect the issuing and accepting sides and administer network rules and interchange; and the acquiring bank facilitates authorization and settlement for the merchant.
A payment gateway is generally the technology that captures and transmits payment details, while a processor handles transaction data as it moves through the payment chain. An acquirer, sometimes called an acquiring bank, supports the merchant-side acceptance and settlement relationship. In practice, providers may bundle gateway, acquiring and processing functions, so the labels are not always cleanly separated in a product description. “Merchant account” and “payment facilitator” also describe different arrangements and should not be assumed to mean the same thing as a processor.
Square describes merchant services broadly as the hardware, software and financial services used to accept and process card and contactless payments online or in a store. It says Square sellers need a dedicated bank account to process through Square. That is Square’s provider-specific requirement, not a universal rule for every payment processor.
Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesBest Value
- With Square Handheld, you can accept payments, take tableside orders, or scan barcodes anywhere. With a slim design and comfortable grip, the POS is easy to carry in your palm or pocket. Square Handheld is designed to withstand water splashes and dust. Add an optional protective case for accidental drops. A long-lasting battery and offline payments let you keep selling.
- Slim, pocketable, and lightweight so you can accept payments wherever your customers are.
- Take tableside orders, bust lines, or use the built-in barcode scanner, all with one sleek device.
- A battery that can power through your shift and offline payments let you keep selling, even if your internet is down.
- Accept all major credit and debit cards and pay one simple rate with no hidden fees and no long-term contracts required.
Do you need a card reader?
No—not for every way of accepting payment. A card reader is relevant to certain in-person workflows; it is not a prerequisite for online checkout, payment links or invoicing.
- Online or remote sales: A customer can pay through a website checkout, payment link or invoice without you owning a reader.
- Phone or manual-entry sales: A virtual terminal may allow staff to enter payment details, subject to the provider’s product and applicable fees.
- In-person contactless payments: Square lists Tap to Pay on supported iPhone and Android devices, and PayPal says Tap to Pay through its app requires no extra hardware. Device and market support should be checked with the provider.
- Other in-person transactions: A reader or terminal may suit your card-present method, staff workflow and receipt needs. Confirm the exact device and connection requirements before purchasing.
PayPal describes its reader as paired with a phone or tablet and its terminal as a standalone device. Its terminal page also describes barcode scanning for inventory management. That does not establish that a generic third-party scanner will work: verify compatibility for the exact terminal model and accessory before buying.
A step-by-step way to choose
- Write down your operating requirements. Record your business country, customer markets, currencies, sales channels, expected payment methods, typical ticket, monthly volume and any accounting, ecommerce or POS integrations you rely on.
- Shortlist providers by workflow. For example, consider Square if a combined small-business POS and commerce workflow is a priority; Stripe if online integration flexibility matters; PayPal if you need its checkout or other specific payment routes; or Adyen if you are assessing a larger, multi-channel or international operation. Treat each as a candidate to assess, not a guaranteed recommendation.
- Match each fee schedule to your transactions. Separate online, card-present, keyed, invoice and other transaction types. Apply the product-specific rate and account for refunds, chargebacks, currency conversion, subscriptions, add-ons and hardware where relevant.
- Check payouts and terms. Confirm settlement timing, transfer fees, account requirements, refund treatment and any other conditions that affect cash flow or the cost of a sale.
- Test the operational fit before committing broadly. Confirm the integration, staff workflow and hardware requirements for the channels you will use. For larger operations or unusual business models, request a written quote using your volume, average ticket, locations and integration needs.
What the published prices can—and cannot—tell you
Provider pricing pages are useful for understanding fee structure and eligibility, but they are not a universal market comparison. The Square and PayPal schedules discussed here are U.S.-specific; Stripe’s page accessed October 8, 2026 redirected to a regional English page; and Adyen describes a fixed processing fee plus a payment-method fee. Prices and product availability differ across markets and can change. Verify the current schedule for your country and ask the provider how each relevant transaction type will be charged.
In particular, do not call a provider “cheapest” without comparing the same geography, channel, payment method and business profile. For a larger business, a quote based on real transaction data is more useful than a comparison of unlike headline fees.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
