Use Stripe: Why It's Your Best-Fit Processor

Verdict

Based on your answers, Stripe is your best-fit processor. Its API-first design and transparent flat rate suit online-first businesses building or customizing their own checkout.

Runner-up: Square

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Why this fits you

Use Stripe: Why It's Your Best-Fit Processor

Stripe is the payment processor built for people writing code, not just clicking buttons in a dashboard. Its API lets a developer embed a fully custom checkout, subscription billing, marketplace payouts, or virtually any payment flow directly into a website or app, with extensive documentation and a huge ecosystem of plugins and integrations for common platforms. If you have (or plan to hire) developer resources and want your checkout to look and behave exactly how you design it, Stripe is the standard answer.

The pricing is refreshingly transparent for a processor with this much depth: 2.9% + $0.30 per successful US card charge, with no monthly fee or minimum on the standard plan. Two common surcharges apply on top: roughly +1.5% for an international card (issued outside the US), and roughly +1% for currency conversion when a charge settles in a different currency than your account's default -- both can stack on the same transaction for a foreign customer paying in their local currency.

Because the fee is a percentage plus a flat $0.30, it disproportionately affects small transactions: a $5 charge costs $0.445 in fees, an 8.9% effective rate, while a $500 charge at the same nominal rate is only about 2.96% effective. If your typical charge size is small and frequent, that fixed-fee drag is worth watching -- a subscription or bundled-charge model reduces how many separate $0.30 fees you pay.

Stripe doesn't include physical card-reader hardware or a walk-up point-of-sale experience the way Square does out of the box (Stripe Terminal exists for in-person card readers, but it's a developer-integrated product, not a plug-and-play register). If most of your business is in-person tap/dip/swipe transactions with no online component, Square's simpler out-of-the-box setup is usually the faster path -- Stripe earns its keep specifically when you're building or customizing an online payment experience.

High-volume businesses processing well into five or six figures monthly can often negotiate custom pricing directly with Stripe below the standard 2.9% + $0.30 rate. For everyone else -- a typical online business or app with real or planned development resources -- Stripe's combination of transparent standard pricing and deep API flexibility makes it the clear developer's choice among the processors compared here.

Source: Stripe's publicly published standard US pricing for 2025-2026 (2.9% + $0.30; +1.5% international card; +1% currency conversion). Note: Stripe negotiates custom volume pricing for larger accounts.

How Stripe compares

StripeSquarePayPalGeneric (interchange-plus)
Fee on a $100 online charge (approx.)$3.20 (3.2%)$3.20 (3.2%, online rate)$3.98 (4.0%)~$2.40-$2.90 (2.4-2.9%)*
Best forCustom/developer checkoutsIn-person + simple onlineNo-website invoicingHigh-volume, known card mix
SetupAPI, requires dev workPlug-and-play POS + onlineSend a link, no dev neededRequires a merchant account
Monthly feeNone (standard)None (standard)NoneOften none, but account fees vary

* Illustrative figures for a same-size sale, rounded -- use the calculators below for your exact numbers.

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Frequently asked questions

Does Stripe charge a monthly fee?

No -- the standard plan has no monthly fee or minimum; you only pay the per-transaction rate on successful charges. Optional add-on products carry their own separate fees.

Can I get a lower rate than 2.9% + $0.30?

Businesses with significant monthly volume can often negotiate custom pricing directly with Stripe. The standard rate applies to typical small-to-medium sellers.

Does Stripe work for in-person sales too?

Yes, through Stripe Terminal, but it requires developer integration rather than the plug-and-play hardware experience Square offers out of the box.

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