Evaluate Solidus alternatives against the storefront and operational flows you actually run: catalog complexity, variants, pricing, promotions, inventory, tax, payments, fulfillment, returns, localization, and extensions. Measure upgrade burden, deployment model, security maintenance, API stability, observability, and total ownership cost. Prototype one representative order from product creation through refund, including failure recovery and webhooks. Build a migration inventory for products, customers, orders, discounts, media, and integrations before selecting a replacement.