Stripe is the best payment processor for most ecommerce businesses in 2026, and Square is the best budget pick for small sellers who want a free plan and also sell in person. Stripe charges a flat 2.9% plus 30 cents per domestic online card payment with no monthly fee, and its tools cover checkout, subscriptions, and fraud screening.
Your store platform often decides the rest. Shopify merchants should start with Shopify Payments, since outside processors add extra fees on that platform. PayPal belongs at checkout for most stores as a second option, Braintree suits developers who want cards, PayPal, and Venmo through one integration, and Adyen fits large brands selling across many countries.
Look past the headline rate before you choose. International cards, currency conversion, chargebacks, and payout speed all add cost, and a processor that freezes funds during a sales spike can hurt more than a slightly higher fee.
Our top pick
Stripe
Flat, published pricing with the most complete developer and checkout tools.
Quick picks
Best overall
Best for Shopify stores
Best checkout wallet
Best on a budget
Best for global brands
How we ranked these tools
We scored each processor on five criteria: fit for online stores, depth of checkout, fraud, and payment method features, pricing and value, ease of setup, and support. Scores draw on vendor documentation, published fee schedules, and public user reviews. We did not accept payment for placement. Rates reflect published US pricing as of October 2026, so confirm current fees with each provider.
The 6 best payment processors for ecommerce
1. Stripe
Best for most online stores and custom checkouts
Our rating4.7 / 5
Starting price2.9% + 30¢ per transaction
Free planNo monthly fee
Stripe is the default choice for online businesses that want flexible, well-documented payments. It charges 2.9% plus 30 cents per domestic online card payment, with an extra 1.5% for international cards and 1% when currency conversion applies. There is no monthly fee or setup fee. It plugs into most ecommerce platforms and handles subscriptions, invoicing, and fraud screening through add-on products. Custom builds need a developer, and some add-ons carry their own fees that raise the effective rate.
Pros
- Flat, published pay-as-you-go pricing
- Excellent developer documentation
- Supports cards, wallets, and many local payment methods
Cons
- Custom builds need developer help
- Add-on products raise the effective rate
Key features
- Hosted and embedded checkout
- Fraud screening
- Subscription billing
- Multi-currency payments
2. Shopify Payments
Best for stores built on Shopify
Our rating4.6 / 5
Starting price2.9% + 30¢ (Basic plan)
Free planNo (needs a Shopify plan)
Shopify Payments is the built-in processor for Shopify stores, so there is nothing extra to set up. Online card rates fall as your Shopify plan rises: 2.9% plus 30 cents on Basic, 2.7% plus 30 cents on Grow, and 2.5% plus 30 cents on Advanced, with higher rates for business and American Express cards. Basic costs $39 a month, or $29 billed annually. Shopify adds a transaction fee when you use an outside processor, so most merchants on the platform use this one.
Pros
- No separate processor setup
- Rates drop on higher Shopify plans
- Payouts and disputes managed inside Shopify
Cons
- Works only with Shopify stores
- Higher rates for business and Amex cards
Key features
- Native Shopify checkout
- Shop Pay accelerated checkout
- Dispute management
- Multi-currency selling
3. PayPal
Best for adding a trusted wallet at checkout
Our rating4.5 / 5
Starting price3.49% + 49¢ per transaction
Free planNo monthly fee
PayPal is less a replacement for your main processor than a payment button most stores should offer. Many shoppers already have PayPal accounts and will choose it over typing in a card. Standard US rates are 3.49% plus 49 cents for PayPal Checkout and Venmo, 4.99% plus 49 cents for Pay Later, and 2.99% plus 49 cents for standard card payments, with no monthly fee. The fixed fee makes small orders expensive, and account holds remain a common seller complaint.
Pros
- Familiar, trusted checkout for shoppers
- Venmo and Pay Later options built in
- Works with nearly every store platform
Cons
- Higher rates than card-first processors
- Account holds frustrate some sellers
Key features
- PayPal and Venmo checkout
- Pay Later installments
- Card processing
- Seller protection program
4. Square
Best for small sellers who also sell in person
Our rating4.4 / 5
Starting price3.3% + 30¢ (Free plan)
Free planYes
Square connects online sales, in-person sales, and inventory in one account, which suits craft sellers, boutiques, and food makers with both a website and a counter. The Free plan charges 3.3% plus 30 cents for online payments and 2.6% plus 15 cents in person. Paid Plus and Premium plans lower the online rate to 2.9% plus 30 cents, and its online API rate is also 2.9% plus 30 cents. Cards issued outside the US add 1.5%. Online-only stores usually pay less elsewhere.
Pros
- Free plan with no monthly fee
- One system for online and in-person sales
- Shared inventory across channels
Cons
- Free plan online rate is higher than rivals
- Fewer advanced ecommerce features than Stripe
Key features
- Online store builder
- In-person card readers
- Shared inventory
- Invoices and payment links
5. Braintree
Best for developers who want cards, PayPal, and Venmo in one integration
Our rating4.3 / 5
Starting price2.89% + 29¢ per transaction
Free planNo monthly fee
Braintree is PayPal’s developer-focused gateway. One integration accepts cards, digital wallets, PayPal, and Venmo, which keeps checkout code simple for teams building their own store. US card and wallet payments cost 2.89% plus 29 cents, Venmo costs 3.49% plus 49 cents, and ACH direct debit costs 0.75% capped at $5. Non-US cards and non-USD payments each add 1%, and chargebacks cost $15. Fees are not returned on refunds, and setup needs a developer.
Pros
- Cards, PayPal, and Venmo through one integration
- Lower card rate than standard PayPal
- ACH direct debit with a fee cap
Cons
- Requires developer work
- Fees not returned on refunds
Key features
- Drop-in checkout UI
- Venmo and PayPal acceptance
- ACH direct debit
- Fraud protection tools
6. Adyen
Best for large brands selling worldwide
Our rating4.2 / 5
Starting price$0.13 + interchange++ per transaction
Free planNo setup or monthly fee
Adyen is an enterprise payments platform that handles online, in-app, and in-store payments across many countries through one contract. It uses interchange plus plus pricing: a $0.13 processing fee per transaction plus the card network’s actual cost and a payment method fee, which for Visa and Mastercard is 0.60%. There are no setup or monthly fees, though some industries face a minimum invoice. Onboarding is built for high-volume merchants, so small stores will find Stripe or Square easier.
Pros
- Transparent interchange plus plus pricing
- Wide local payment method coverage
- Online and in-store on one platform
Cons
- Built for high-volume merchants
- Minimum invoice for some industries
Key features
- Global acquiring
- Local payment methods
- Risk management
- Unified commerce reporting
Compare the top ecommerce payment processors
| Tool | Best for | Starting price | Free plan | Rating |
|---|---|---|---|---|
| Stripe | Most online stores and custom checkouts | 2.9% + 30¢ per transaction | No monthly fee | 4.7 |
| Shopify Payments | Stores built on Shopify | 2.9% + 30¢ (Basic plan) | No (needs a Shopify plan) | 4.6 |
| PayPal | Adding a trusted wallet at checkout | 3.49% + 49¢ per transaction | No monthly fee | 4.5 |
| Square | Small sellers who also sell in person | 3.3% + 30¢ (Free plan) | Yes | 4.4 |
| Braintree | Developers who want cards, PayPal, and Venmo in one integration | 2.89% + 29¢ per transaction | No monthly fee | 4.3 |
| Adyen | Large brands selling worldwide | $0.13 + interchange++ per transaction | No setup or monthly fee | 4.2 |
How to choose a payment processor for ecommerce
Start with your store platform
Your ecommerce platform narrows the field. Shopify stores save money with Shopify Payments, while WooCommerce, BigCommerce, and custom builds work well with Stripe, PayPal, or Braintree. Check that the processor has an official, maintained integration for your platform before you compare rates.
Calculate your real effective rate
Multiply each fee by your actual mix of orders. A store with many small orders feels the fixed per-transaction fee most, and a store with many overseas buyers pays international and conversion surcharges on top. Run last month’s orders through each fee schedule to compare fairly.
Offer more than one way to pay
Most stores benefit from a card processor plus PayPal at checkout, and many add Apple Pay, Google Pay, or a buy now, pay later option. Each extra method is easy to enable in Stripe, Shopify Payments, or Braintree, so test which ones your customers actually use.
Plan for holds and chargebacks
New accounts, sudden sales spikes, and high-risk products can trigger reserves or payout delays. Ask how each provider handles disputes, what a chargeback costs, and how fast payouts arrive, then keep a cash buffer for your first few months.
Frequently asked questions
What is the cheapest payment processor for ecommerce?
It depends on order size and volume. Stripe’s 2.9% plus 30 cents is among the lowest flat rates for small and midsize stores, and Braintree charges 2.89% plus 29 cents on cards. Shopify stores on the Advanced plan pay 2.5% plus 30 cents. Large merchants often save more with interchange plus plus pricing from Adyen.
Do you need a merchant account to sell online?
Usually not. Stripe, Square, PayPal, and Shopify Payments are payment facilitators, so they handle the merchant account for you and approve most businesses quickly. Large or high-risk businesses sometimes get a dedicated merchant account for more stable terms, often through a provider such as Adyen.
Should you offer PayPal alongside a card processor?
Yes, for most stores. Many shoppers prefer to pay with an existing PayPal or Venmo account rather than enter card details. PayPal’s rate is higher than a typical card rate, so treat it as an extra checkout option rather than your only processor.
Can you use Stripe on Shopify?
Shopify uses Shopify Payments, which runs on Stripe’s infrastructure, in supported countries. You cannot connect your own Stripe account as the main card processor in those regions. Shopify adds a transaction fee when a store uses an outside payment provider, so Shopify Payments is usually cheaper.
How long do payment processors take to pay out?
Standard payouts typically arrive within a few business days, depending on the provider, your bank, and your account history. New accounts often start on a slower schedule. Stripe, Square, and PayPal also offer instant or faster payouts for an extra fee.
Keep reading
Buyer’s guide
How to Choose a Payment Processor for Ecommerce in 2026
A practical guide to choosing an ecommerce payment processor by platform fit, effective rate, payment methods, fraud and chargeback costs, and payout terms.
Comparison
Stripe vs Shopify Payments: Which Is Better in 2026?
Shopify Payments suits stores built on Shopify. Stripe suits stores on other platforms, custom checkouts, and businesses that sell beyond one storefront.
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