Best Credit Card Processing Companies in 2026: 10 Companies Compared

Square is the easiest starting point for a small business that wants to take cards this week. There is no monthly fee on the free plan, hardware ranges from a simple reader to a full counter setup, and the same account can support in-person sales, invoices, and an online store. Published in-person rates sit around 2.6 percent plus 15 cents on the free plan, with higher online rates. The weakness appears as volume grows. Flat rates bake in an average card cost, so you pay the same rate for a cheap debit card and an expensive rewards card. Once monthly card volume passes roughly ten thousand dollars, an interchange-plus quote is worth comparing.

Stripe is the standard choice for online businesses that need flexible checkout. Its published standard online rate is 2.9 percent plus 30 cents for many US card payments, with extra fees for international cards and currency conversion. Developer tools cover subscriptions, marketplaces, invoicing, and payment links, which is why so many software and e-commerce companies build on Stripe. Stripe is less suited to a shop that mainly takes cards in person, where a point of sale system such as Square or Clover may fit better. Chargeback fees also add up for dispute-prone sellers, so read the current fee schedule before you commit.

PayPal earns its place through buyer trust. Many online shoppers prefer to pay with PayPal rather than typing card details into an unfamiliar store, and that familiarity can lift conversion for small sellers. Standard online checkout rates are higher than Square in-person rates, with published PayPal Checkout rates around 3.49 percent plus 49 cents, so the cost of that trust is real. PayPal suits sellers who already get traffic from buyers who ask for it, and sellers who want invoicing and online payments without a developer setup. Compare PayPal against Stripe on your average order value, since the fixed per-transaction fee matters more on small orders.

Helcim is the transparency pick on this list. It charges interchange, which is the cost paid to the card-issuing bank, plus a published markup. Published entry tiers sit around interchange plus 0.40 percent plus 8 cents in person and interchange plus 0.50 percent plus 25 cents online, with lower markups at higher volumes. There is no monthly fee to earn back, which makes the comparison with flat-rate tools unusually clean. That transparency helps most when you accept many debit cards, because interchange-plus passes the lower debit cost to you instead of averaging it away. Helcim suits growing businesses that want to see exactly what each card costs and are ready to read a monthly statement rather than a single flat rate.

Payment Depot uses a membership model. You pay a monthly fee, then pay interchange plus a small per-transaction fee, without a percentage markup on top of interchange. That structure can save a meaningful amount for businesses with steady, high card volume, because the savings on each sale eventually pass the monthly fee. Low volume sellers should be careful. A monthly fee that looks small on paper still needs to be covered every month, including slow months. Payment Depot fits established businesses with predictable volume that can model the break-even point from real statements. New sellers should start with a no-monthly-fee option and revisit Payment Depot once volume is stable.

Stax, formerly Fattmerchant, follows a similar idea to Payment Depot. You pay a monthly subscription and then pay interchange plus a small per-transaction fee, rather than a percentage markup. For businesses processing tens of thousands of dollars a month, that model can beat flat-rate pricing by a clear margin, especially on larger average orders. The same warning applies in reverse. If your volume falls, the subscription does not fall with it, so the deal that saved money in a busy month can cost money in a quiet one. Stax pricing tiers have also changed over time, so confirm the current monthly fee and per-transaction charge in writing before you sign. Stax suits established, higher volume sellers who can forecast volume with confidence.

Clover is a point of sale system first and a processor second. Its hardware covers mobile readers, counter terminals, and full stations, and its software handles inventory, staff, orders, and reporting. Published in-person processing rates vary by plan, often around 2.3 to 2.6 percent plus 10 cents, with higher rates for keyed-in payments. Cost is the main question. Many Clover bundles carry monthly software fees and agreements that run for years, so the total cost over the agreement matters more than the processing rate alone. Clover suits shops and restaurants that want an integrated counter system and are ready to commit to it. Sellers who only need to take occasional payments should compare Square or Helcim first.

Toast is the restaurant specialist on this list. It covers table management, menus, online ordering, handheld ordering, kitchen display, and reporting in one system, which is why many full-service and quick-service restaurants choose it over a general point of sale tool. Staff can take orders at the table and send them straight to the kitchen. Pricing needs care. Toast does not always publish a single processing rate, so you should ask for a written quote based on your volume, average ticket, and card mix, and compare it with Square and Clover on the same numbers. Toast suits restaurants that will use its restaurant tools daily. A retailer or service business will usually get better value elsewhere.

Shopify Payments is the natural choice for a business already selling on Shopify. It is built into checkout, so there is no separate gateway to configure, and published online card rates on the Basic plan sit around 2.9 percent plus 30 cents, with lower rates on higher tiers. Shop Pay and wallet payments can also help conversion for repeat buyers. The catch is lock-in. Shopify Payments only makes sense inside a Shopify store, and the store plan fee sits on top of processing costs. Sellers who use a third-party gateway on Shopify may also pay extra Shopify transaction fees. For a Shopify store owner, Shopify Payments is usually the simplest and cheapest path. For a seller on another platform, Stripe or PayPal is a better fit.

Authorize.net is a gateway, not a complete processor by itself. It connects your website or point of sale system to a merchant account, handles card authorisation, and offers fraud screening and recurring billing. The published gateway fee is around 25 dollars per month, plus per-transaction gateway fees, with processing costs charged by the merchant account behind it. That split confuses many first-time sellers. Authorize.net suits businesses that already have, or want, a separate merchant account and need a gateway that works with many carts and platforms. Sellers who want one account, one statement, and one support team should choose Square, Stripe, or Helcim instead.