No fee for using your own gateway.
On Shopify, choosing a third-party payment provider adds a Shopify transaction fee on top of your processing fee, and Shopify Payments isn't available in every country. On Selzix, buyers pay through your own Stripe account, or Razorpay in India, and Selzix takes 0% of every sale.
One plan instead of tiers.
Shopify splits features and fee rates across several plans. Selzix has one plan at a flat regional price, with the storefront, catalogue, orders, customers, analytics and blog included.
The everyday tools are built in.
Invoices with your VAT, GST or sales tax, product reviews, abandoned-cart reminders, coupons and automatic offers, domestic and international shipping rates, and a buyer tracking page come with every Selzix store. On Shopify, some of these rely on apps with their own pricing.
Your customers are your customers.
Buyers see your domain and pay into your own gateway account, which settles to you. Export your customer list as CSV whenever you need it.