Switching Integration Tools: Migrating Without Losing Data

The hard part of switching integration tools is not setting up the new one but getting your data out of the old one. If product and order data can be exported, migration is usually a day's work. If it cannot, the cost of leaving can exceed the subscription itself — which is why data portability is a selection criterion.

What are the signs it is time to switch?

The decision usually comes from accumulated friction rather than a single event. The four most common signs:

• Silent sync failures. If stock updates have stopped while the panel keeps showing old data, the integration is not giving you reliable information.
• No visibility into real profitability. If profit is calculated from a category estimate rather than the order's real commission, you cannot make decisions on low-margin products.
• Manual work coming back. If you still switch to the marketplace panel for returns or customer questions, the integration took over only part of the operation.
• Scale limits. The tool slowing down as product or store count grows, or plan limits constraining the business.

Not all of these require a switch. Some are solved by a settings change in your current tool — before deciding, put these four headings to your provider directly.

Which data should you extract first?

Order matters; without the first three, the new setup starts incomplete.

1. Product catalog — barcode/SKU, titles, variant structure, category assignment. This is the backbone of the migration.
2. Current stock — real quantities at the moment of transition.
3. Marketplace mappings — which product is bound to which record on which marketplace.
4. Order history — needed for profitability analysis and season-over-season comparison.
5. Supplier and purchase cost data — an input to profit calculation, and hard to reassemble if lost.
6. Automation rules — they may not transfer directly, but should be listed for rebuilding.

Items four and five are the most overlooked. Stock and catalog feel urgent so they get taken first; order history and cost data become inaccessible once the subscription closes.

In what order should the migration run?

Closing the old tool and opening the new one is the riskiest route. The right approach is running in parallel:

1. Register API keys in the new tool and run the first sync in read-only mode; do not let it write stock or prices yet.
2. Verify catalog matching. Do the product counts and stock values shown by both tools agree?
3. Enable write permission on a small number of products and watch for a day.
4. If stock and prices are written correctly, widen coverage gradually.
5. Once the whole catalog has moved, disable writing in the old tool — but do not end the subscription yet.
6. If nothing goes wrong for a week, close the old subscription.

The distinction in step five is critical: disabling writes and closing the subscription are not the same thing. While the subscription remains open you keep access to your data; once closed, most providers cut it off.

The most common migration mistakes

Both tools writing stock at once. This is the one rule of parallel running: only one tool may write at a time. If both do, stock values overwrite each other and it becomes unclear which number is correct.

Skipping catalog verification. If barcode matching is wrong, the new tool updates the wrong product's stock and the error spreads faster than before.

Migrating during a peak. Switching during a campaign week aligns the highest error probability with the highest volume day. Pick a quiet week.

Closing before extracting order history. Retrospective profitability and season comparison depend on that data, and it usually cannot be recovered after the subscription ends.

What to look for in the new tool

For a seller who has been through a migration, the most important criterion is that the next migration is easy. So put data portability first: can you export product, order and customer data whenever you want?

The other four criteria — stock model, source of commission data, return and question flow, error visibility — are covered in detail in the integration tool selection guide. Ask to see all five on screen during a demo.

Post-migration checklist

Check daily during the first week:

• [ ] Do stock values match between the marketplace and the panel?
• [ ] Are new orders arriving complete?
• [ ] Do return requests reach the panel?
• [ ] Does sync failure notification work (test it by entering a wrong key deliberately)?
• [ ] Does the profit calculation use real commission?

The fifth is the item most sellers never check, and it is what separates profit from loss on low-margin products.

For the general framework, see the marketplace integration guide; for Trendyol-specific steps, see the Trendyol integration page.