A custom platform can provide code-level control and exact business behavior, but the business owns infrastructure, security, upgrades, key-person knowledge, and every extension. Shopify provides a managed commerce foundation with defined extension points. Compare differentiating requirements, control, maintainability, risk, integration needs, team capability, and total cost.
Keep the differentiation and challenge the maintenance burden
A custom platform can embody valuable business behaviour, but it can also contain years of exceptions that nobody has reviewed. Separate what makes the business distinctive from what only makes the software difficult to maintain. The people operating the system often know important rules that are missing from technical documentation.
Shopify changes the boundary between managed platform features and custom work. Prove the requirements that must remain using supported capabilities and clearly owned integrations. Do not measure success by reproducing the old database or screens; measure whether customers and staff can complete the required work reliably.
Include the cost of retaining historical access and retiring the old system. Replatforming does not end when the domain switches. Reporting, records, integrations, contracts, and support procedures may depend on the legacy platform long after the last new order is placed there.
On smaller screens, scroll the table sideways to compare both platforms.
| Area | Existing custom platform | Proposed Shopify architecture |
|---|---|---|
| Business behaviour | Discover both documented rules and operational workarounds. | Prove required outcomes and record deliberate process changes. |
| Technical ownership | Identify infrastructure, code, dependencies, and key-person knowledge. | Assign native configuration, apps, extensions, and external integrations. |
| Data | Discover schemas, relationships, exports, and source identifiers. | Define transformations, reconciliation, and accessible historical records. |
| End state | Decide what can be retired and what still serves a purpose. | Avoid leaving unowned legacy dependencies after launch. |
What to check before deciding
- Identify valuable business rules and their current users.
- Test the hardest requirement against the proposed Shopify architecture.
- Compare ongoing ownership and dependency risk.
- Plan historical access and retirement alongside launch.
