BigCommerce vs Shopify Plus is the enterprise commerce decision that determines your transaction fee bill and B2B capability ceiling for the next three years. Shopify Plus starts at $2,300/month with 8,000+ apps. BigCommerce Enterprise starts at $1,000/month with zero platform transaction fees on any gateway. A $5M GMV merchant on a third-party gateway pays $7,500–$10,000/year extra on Shopify. BigCommerce charges nothing.