A payment gateway is the technology that transfers funds from your customer’s card to your business bank account every time a card is used. It encrypts the payment data, sends it to the card networks for approval, and routes the funds to your payment processing service. Most providers bundle the gateway and the processing together, so when small business owners search for the best payment gateway for small business, they’re usually looking for the whole package, including support for credit card payments, debit card payments, and digital wallets like Apple Pay, Google Pay, and Samsung Pay.
The options in this space range from plug-and-play platforms you can set up in minutes to full-service merchant accounts with dedicated support and specialized underwriting. Neither approach is wrong. They serve different businesses at different stages and with varying needs for mobile payments, payment links, and integration with accounting software.
The four options below represent the most common choices small businesses land on. Each one is a legitimate fit for the right situation. Understanding where they differ is the fastest way to figure out which one is right for you.
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AVPS (AVP Solutions)
AVP Solutions is a registered ISO/MSP with 30+ years in the payment processing industry. AVPS gives merchants a dedicated business account, meaning your account is individually underwritten, and your processing history belongs to you. That’s a different model than the aggregated accounts that platforms like Square and Stripe use, and it matters most for businesses that need long-term account stability or operate in categories those platforms won’t support.
AVPS supports multiple gateway options, including NMI, Authorize.net, Nuvei, and Greenlight Payments. If you process online, in-store, or both, there’s a configuration that fits. ACH and eCheck processing are also available. ACH, or Automated Clearing House, lets customers pay by bank transfer, which typically costs less to process than card transactions.
What It Does Well
The thing AVPS is most known for among its clients is support. Multiple merchants reference working with the same staff contacts for seven or eight years. In an industry where most processors hand you a generic customer service number after onboarding and leave you to figure out the rest, such continuity is uncommon. Payment processors should also offer 24/7 customer support for payment issues that arise outside business hours.
AVPS is a PCI Level 1 provider, the highest tier of PCI DSS compliance, and processes more than 50 million transactions per month. The company has banking partnerships with the Central Bank of St. Louis and SSB Bank, which provide it with the underwriting infrastructure to onboard hard-to-place merchants. That covers businesses in industries that standard processors won’t take on, as well as merchants that have been terminated elsewhere and need to get back up and running quickly. Unlike payment service providers, AVPS uses a dedicated merchant account model, and PSPs typically have less stringent approval processes than merchant accounts.
Transaction Fees
Rates are based on your business type, volume, and transaction profile rather than a flat published rate. The interchange rate, the base cost set by Visa and Mastercard that’s identical for every processor, is passed through directly. The markup is discussed openly, and AVPS actively reviews accounts to flag unnecessary charges. Ask whether the quoted fee structure includes extras like chargeback fees or monthly minimums, since transaction fees and hidden fees can materially change your total cost. That kind of ongoing fee transparency is not standard practice in this industry.
Chargeback Tools
AVPS provides access to FRAUDefender, Order Insight, and Disputifier for chargeback prevention and dispute management. Chargebacks are disputes filed by customers with their bank, and they can quickly consume staff time and money, while also making it important to keep your rate below certain thresholds to maintain your account in good standing. Having monitoring tools in place is considerably cheaper than managing disputes after they pile up.
Best For
Businesses that need a dedicated merchant account, operate in higher-risk or specialty categories, or have been dropped by another processor. Also, a strong fit for any merchant who has outgrown a platform processor and wants an ongoing relationship with a real point of contact. It’s especially relevant for businesses that need broader merchant services and more control than plug-and-play platforms usually offer.
Stripe
Stripe is a well-known payment processing service built around developer flexibility. Its API is one of the most capable in the industry, and businesses that need custom checkout flows, subscription billing, marketplace payouts, or deep integrations with their existing systems tend to gravitate toward it. Stripe also supports over 135 currencies across more than 50 countries, which makes it a natural fit for businesses with international customers and those accepting multiple currencies.
Setup is fast. There’s no lengthy underwriting process, and Stripe’s documentation is detailed enough that a developer can have a working integration running in an afternoon.
What It Does Well
Stripe’s toolset is genuinely broad. Stripe Elements handles custom checkout design, Stripe Connect handles payouts in marketplace and platform models, and Radar uses machine learning for fraud detection, which helps small businesses manage fraud and security risks with modern payment processing software. An online payment processing system must support payment security by using encryption to protect sensitive data, and Stripe’s payment technology uses tokenization, replacing sensitive card data with a unique identifier rather than storing it in plain text. For a technical founder or a business with development resources, Stripe can scale from the first transaction through significant growth without requiring a platform switch. Support for one-click checkout can also improve conversion by reducing cart abandonment.
Stripe supports digital wallets, including Apple Pay, Google Pay, and Samsung Pay, enabling customers to pay quickly and securely via mobile.
The flat-rate pricing model is also straightforward. You know exactly what each transaction will cost, which makes financial forecasting simple in the early stages.
Transaction Fees
Stripe charges 2.9% plus $0.30 per online transaction and 2.7% plus $0.05 for in-person transactions. There’s no monthly fee on the standard plan. International cards incur additional fees, and certain features, such as advanced fraud protection, come at an extra cost. For small businesses comparing processing fees, online card rates are usually much higher than ACH transfers, which often carry a lower fixed fee and lower overall cost than typical credit card processing fees.
At higher volumes, the flat-rate model becomes more expensive than interchange-plus alternatives. A business processing $50,000 per month in credit card processing could pay roughly $1,450 to $1,500 in monthly credit card fees on standard card volume alone, which is why many merchants review total processing fees as they scale.
Chargeback Tools
Stripe offers Radar for automated fraud detection and dispute management tools built into the dashboard. Radar can block suspicious transactions before they are processed, reducing chargeback exposure most when your supported payment methods align with your customers’ preferred payment methods. Credit and debit cards remain among the most popular options, so controlling fraud on those transactions matters most.
Best For
Online-first businesses, SaaS companies, and developers building custom payment flows. Stripe is particularly strong for businesses that need to handle recurring billing, international payments, or complex payout structures. If your transaction profile is straightforward and your volume is moderate, Stripe’s flat-rate pricing works cleanly. It’s also a strong choice when your business model depends on recurring payments or platform-style payouts.
Square
Square is designed for speed and simplicity. Businesses can sign up, receive a free card reader, and start accepting payments within a day. The platform combines payment processing with POS software, inventory management, and sales reporting in one place, which removes the need to stitch together separate tools in the early stages of running a business.
Square’s hardware lineup covers countertop terminals, mobile readers, and full register setups, so it works across a range of physical retail environments.
What It Does Well
For small retail businesses, food vendors, and service providers that operate primarily in person, Square removes a lot of friction. The free card reader lowers the barrier to entry, the POS software is intuitive, and having payments, inventory, and reporting in one dashboard saves time while making cash flow and records easier to track for very small teams. Square works well for businesses that want a single payment system rather than piecing together separate tools. Square also has no monthly fee on its base plan, which keeps costs low for businesses with inconsistent or seasonal volume.
Square supports many payment gateways and accepts payments via credit cards, debit cards, and digital wallets, including Apple Pay, Google Pay, and Samsung Pay. It also offers payment links for easy online sales.
Transaction Fees
Square charges 2.6% plus $0.15 for in-person transactions and 3.3% plus $0.30 for online card payments processed through Square’s hosted tools. The flat-rate structure means you always know what a transaction will cost, with no interchange breakdowns to interpret.
This pricing tends to suit lower-volume merchants who prioritize predictable transaction fees over the lowest possible rate.
Chargeback Tools
Square includes basic dispute management through its dashboard. Merchants can submit evidence for chargebacks directly through the platform. The toolset is functional for standard retail disputes, though it’s less robust than dedicated chargeback management tools available through full-service processors. When technical issues interrupt processing payments during peak hours, even a simple dispute workflow does not prevent lost sales in the moment.
Best For
Small retail businesses, food and beverage vendors, and service providers that primarily sell in person and are in the early stages of building volume. Square’s all-in-one platform is genuinely useful when simplicity matters more than customization. It’s best when you need to accept payments in person quickly without building custom integrations.
Helcim
Helcim uses interchange-plus pricing, which is the most transparent fee model in payment processing. Interchange-plus means you pay the actual interchange rate, the same base cost that Visa and Mastercard set for every processor, plus a fixed markup that Helcim discloses clearly. Helcim is often evaluated as a payment processing service for businesses that want transparent pricing rather than bundled flat rates. When customers pay with lower-cost cards, you pay less. The savings are passed directly to you rather than absorbed as margin.
It’s important to note that Helcim is available in the US and Canada only.
What It Does Well
The pricing model is the main draw. At a processing volume of $30,000 per month, Helcim is typically 25 to 35% cheaper than flat-rate processors. Volume discounts apply automatically above $50,000 per month without any negotiation required. Helcim also charges no monthly fee, setup fee, or PCI compliance fee, which keeps the total processing cost lower than most comparable options.
For businesses that have been processing for a while and want to understand exactly what they’re paying and why, interchange-plus pricing provides a level of visibility that flat-rate models simply don’t.
Helcim supports multiple payment methods, including credit card payments, debit card payments, ACH, and digital wallets such as Apple Pay and Google Pay. It also integrates with popular accounting software, helping streamline transaction data management.
Transaction Fees
Helcim’s fees vary by transaction type because the interchange component depends on the card used. The fixed markup Helcim adds is disclosed upfront. Interchange-plus is especially useful for businesses that want to see how different accepted payment methods affect costs from one transaction to the next. In-person transactions generally come in lower than online transactions because card-present payments carry less fraud risk, which the card networks price accordingly.
Chargeback Tools
Helcim includes dispute management through its dashboard, with tools to track and respond to chargebacks. The platform also offers fraud detection features for online transactions. The chargeback toolset is comparable to that offered by most standard processors.
Best For
Established small businesses consistently processing $10,000 or more per month that want full visibility into their fee breakdown and automatic savings as volume grows. Helcim works best for standard merchant categories. It does not support high-risk businesses, so if your industry requires specialized underwriting, you’ll need to look elsewhere. It is strongest for established businesses that want their own merchant account with clear pricing, not merchants that need high-risk approval flexibility.
How to Choose the Right Payment Gateway
The right payment solution depends on both transaction fees and the checkout experience you want customers to have. The most important structural question is whether you need a dedicated merchant account or an aggregated platform account. Aggregated accounts are faster to set up and require no underwriting. Dedicated merchant accounts take more time upfront, but give you a business-specific account, individual risk management, and a direct relationship with your processor.
Your choice between merchant account providers and easier signup options also depends on how much control you need over risk, pricing, and account stability. For businesses with significant volume or any complexity in their transaction profile, the dedicated account is usually the more stable foundation. That is also why comparing any payment processing provider, or a broader group of payment gateway providers, should come back to transaction volume, accepted payment types, industry requirements, and how well the setup can scale with the business.
The pricing model is the second major consideration. Flat-rate pricing, which Square and Stripe use, is predictable and easy to read. Interchange-plus pricing, which Helcim uses, is more transparent and typically cheaper at higher volumes, but it requires a bit more familiarity with how the fee breakdown works. Some platforms use subscription-based pricing with a monthly fee plus transaction costs. AVPS works with merchants directly to determine the right rate structure for their specific situation.
Supporting multiple payment methods, including credit and debit cards, ACH, and digital wallets such as Apple Pay, Google Pay, and Samsung Pay, is essential. Also, consider whether the gateway supports payment links for invoicing and online sales, and if it integrates smoothly with your existing accounting software and business bank account.
Questions to Ask Any Processor Before You Sign Up
What is my effective rate broken down by interchange and markup, not just a blended rate? Do I have a dedicated merchant account or a shared one? Who is my point of contact if there’s a problem with my account? What are the contract terms, and how do I cancel? How do you handle account reviews or holds? Does the system support multiple currencies? Can I access detailed transaction data and customer data? Does the payment gateway support mobile payments and digital wallets? Will it integrate with my existing systems?
The blended rate question matters most. Most processors show merchants only a single blended rate on their monthly statement, even though the processor markup is where the real variation between providers lives. Knowing the breakdown is the first step to knowing whether you’re paying a fair price.
The Bottom Line
If you need a dedicated merchant account, operate in a specialty or higher-risk category, or want a processor with a real support relationship, AVPS is built for that. If you’re an online-first business with development resources and a standard transaction profile, Stripe is a strong fit. If you’re a small physical retailer in the early stages and simplicity is the priority, Square is worth considering. If you’re processing meaningful volume and want the most cost-transparent pricing model available, Helcim delivers. If your priority is the best online payment setup for simple checkout, it’s also smart to compare other online payment processors and gateway alternatives, including PayPal, whose standard U.S. credit card rate is 3.49% + $0.49 per transaction.
