A checkout flow is portable only when the business can preserve the records, customer relationships, payment continuity, integrations, and operational control needed to keep selling. A storefront theme can be easy to replace while orders, subscriptions, vaulted payment methods, tax configuration, fraud history, gift balances, and customer identities remain tied to one provider.
Inventory the complete checkout system
Map product and variant identifiers, prices, discounts, carts, customer profiles, consent, addresses, orders, refunds, disputes, subscriptions, payment methods, tax, shipping, inventory, fulfillment, gift cards, store credit, invoices, analytics, fraud rules, webhooks, receipts, and support records. Identify the legal merchant, account owner, administrators, recovery contacts, processor relationship, bank settlement account, and billing owner.
Do not copy live card data or secrets into a comparison file. Use test mode and fictional customers. Stop before changing payment routing, moving a domain, replacing an account owner, or creating a charge unless those actions are explicitly authorized.
Inspect exports field by field
Shopify's order export documentation describes CSV exports with order, customer, line-item, payment-reference, refund, tax, fulfillment, and other fields. It also notes that an exported transaction history includes captured payment data but not authorization data. That distinction shows why a visible order export should not be treated as a complete processor ledger.
Shopify's customer import and export guidance documents UTF-8 customer CSV files, but states that passwords cannot be migrated by CSV and that order information cannot be imported through the customer CSV. Compare every required object and relationship rather than counting files.
Treat payment portability as a controlled migration
Sensitive payment credentials are not an ordinary download. Stripe's customer-data migration guide describes a multi-step plan for new and existing customers and says PAN data transfers to or from another processor require secure, PCI-compliant coordination. It also calls for mapping files and subscription remapping where applicable.
Ask each option how tokens, customers, subscriptions, mandates, network references, failed payments, and upcoming invoices move. Record who initiates the transfer, eligibility, required processor cooperation, fees, lead time, mapping format, unsupported payment methods, regional limits, and customer re-entry requirements. Never assume a processor token can simply be exported and reused elsewhere.
Run a representative round trip
In test mode, create simple and variant products, a discount, tax, shipping, guest and account customers, successful and declined payments, refund, subscription if relevant, canceled order, fulfillment, and webhook events. Export records and compare stable IDs, timestamps, currencies, tax, line items, discounts, consent, payment status, refunds, fulfillment, and reconciliation references.
Import into a clean staging destination where supported. Confirm that customers can regain access without password impersonation, orders remain understandable, subscriptions map to correct prices and dates, and accounting totals reconcile. A readable archive is valuable evidence, but it is not a successful operational migration.
Compare ownership, dependencies, and failure modes
Determine who controls the merchant account, payment processor, domain, customer communications, tax service, fraud tools, shipping accounts, app integrations, and webhook endpoints. Check how staff access is revoked, how the owner recovers the account, and what happens after a subscription downgrade or platform termination.
Model processor outage, failed webhook, duplicated event, expired card, disputed payment, subscription retry, tax-service failure, and rollback during migration. Require idempotent processing and a reconciliation plan so a cutover does not silently duplicate orders or miss fulfillment.
Score the real exit path
Compare conversion usability, accessibility, supported payment methods, fraud controls, tax and shipping coverage, reporting, fees, settlement, refunds, subscriptions, export completeness, import capability, API and webhook access, payment migration, identity recovery, retention, and support. Mark unknowns clearly.
The comparison is complete when the authorized merchant can export representative records, explain omissions, reconcile money and orders, recover core accounts, migrate or deliberately re-collect payment details through an approved process, and roll back a staged cutover. Choose the flow whose documented limitations and tested exit cost are acceptable, not merely the checkout with the shortest demo.
Sources
- Exporting orders — Shopify Help Center
- Importing and exporting customer lists — Shopify Help Center
- Migrate your customer data to Stripe — Stripe Documentation