The best payment gateways for eCommerce businesses are PayPal, Shopify Payments, Stripe, Square, HubSpot Payments, and Helcim. Each has its own strengths and weaknesses, with features such as recurring billing, advanced analytics, and seamless integration with websites or eCommerce platforms. When choosing a payment gateway, consider factors like accepted payment methods, ease of integration, security, checkout experience, and extra features. The article provides in-depth analysis and comparison of these six top-rated payment gateways, helping businesses make informed decisions about their online payment processing needs.