Square Alternatives for Online Selling: Beyond the Card Reader

Square built its reputation on the card reader — a simple, flat-rate solution for small physical retailers. Its online selling tools have improved, but merchants who depend primarily on ecommerce often find Square’s WooCommerce integration, international support, and customization options don’t scale with their needs. This guide covers the best Square alternatives for online-first and omnichannel merchants ready to move on.

Why Merchants Outgrow Square for Online Selling

Square’s online limitations become apparent as stores grow:

• US-focused — Square’s online payments are primarily available in the US, Canada, Australia, UK, and Japan. Limited international payment method support beyond these markets
• Flat-rate pricing only — 2.9% + $0.30 per online transaction with no interchange++ option; at $50K+/month, the fee disadvantage compounds significantly
• WooCommerce integration is functional but not specialized — Square’s WooCommerce plugin handles basic transactions but lacks the deep integration of WooCommerce-native gateways
• Limited fraud tools for ecommerce — Square’s fraud tools are designed for card-present transactions; CNP fraud prevention capabilities are more limited
• Not designed for regulated industries — Square’s merchant category restrictions are similar to Stripe’s

1. ConvesioPay — Best for WooCommerce

Why it replaces Square for WooCommerce merchants:

• Interchange++ pricing — typically 0.4–0.8% cheaper than Square’s flat rate at volume
• WooCommerce-native integration — built specifically for WooCommerce, not adapted from a POS system
• Enterprise fraud tools — 3DS2, configurable fraud rules, Adyen RevenueProtect — no separate plugin needed
• Global payment methods — 150+ payment methods via Adyen’s network vs. Square’s limited international support
• Apple Pay and Google Pay — included with zero additional setup
• Certified Adyen partner — better account stability than Square’s aggregator model

Best for: WooCommerce merchants at any volume who want to sell online seriously — particularly those growing beyond US-only sales or approaching volumes where flat-rate pricing becomes expensive.

2. Stripe — Best for Developer Flexibility

Why it’s a Square alternative: Same flat-rate pricing as Square (2.9% + $0.30), but with a significantly better developer experience, broader country support (46+ vs. Square’s 5–6 markets), and a better-maintained WooCommerce plugin.

Limitations vs. ConvesioPay: Still flat-rate; account freeze risk; limited regulated industry support.

Best for: Developer-heavy teams who want API flexibility and broader international reach than Square provides.

3. Shopify Payments — Best for Shopify Migrants

Why it’s relevant: Some merchants considering Square alternatives for online selling are also reconsidering their entire ecommerce platform. Shopify Payments (Stripe-powered) offers tighter native integration than Square for pure ecommerce.

Limitation: Only available if you’re using Shopify — not WooCommerce. Not a path for merchants staying on WooCommerce.

4. Authorize.net — Best for Traditional Merchant Account

Why it’s a Square alternative: Traditional merchant account model (not an aggregator like Square) provides better account stability; Advanced Fraud Detection Suite; interchange++ pricing available through partner banks.

Limitation: More complex setup (separate merchant account required); dated interface; monthly gateway fees.

Best for: Established merchants who want account stability and are comfortable with a more involved setup process.

5. When to Keep Square

Square remains a strong choice if:

• Your business has significant physical retail volume and you want unified in-person + online reporting
• You use Square’s POS hardware and inventory management
• Your online volume is low enough that the fee difference is immaterial
• You’re primarily selling in the US and don’t need international payment methods

The case for switching from Square grows stronger as your online-to-physical revenue ratio increases and as your monthly processing volume climbs above $20–30K.

Comparison: Square vs. Top Alternatives for Online Selling

For more on WooCommerce payment options, see Best WooCommerce Payment Gateway: A 2025 Comparison Guide and Best Stripe Alternatives for Ecommerce in 2025.