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Komerza can import your store data from another platform in one guided step. The migration tool supports Sellhub, SellAuth, SellApp and Shoppex. Coming from anywhere else - Sellpass, Sell.sn, Paylix or another platform - contact support and we will advise on the best path. You start the import, watch it run live, and get an email when it finishes. A large catalogue can take twenty minutes or more, and you can close the tab while it works.

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What imports

Every platform brings across products and their variants, serials and license keys, reviews, orders and customers. What differs is the detail each platform’s API is willing to hand over. Never migrated, from any platform: coupons, categories, payment gateway configuration, custom domains, balances and funds, and subscriptions. Plan to set those up on Komerza after the import. The dashboard shows the full list for the platform you pick - both what will come across and what will not - before you press Start. That list is the authoritative one; the table above is the summary.
Imports: products with images, descriptions, pricing, slugs and visibility; variants with their own price, stock, delivery setup and descriptions; serials and license keys per variant; checkout questions; volume pricing tiers, and whether a coupon cancels them; product badges with their wording and colour; delivery setup including instructions, dynamic URLs and blocked payment methods; reviews with ratings, messages, replies and original dates; orders with line items, statuses, delivered goods and payment references; customers folded together by email, with their store credit.Left behind: reviews that were hidden, pending or disputed on SellAuth stay hidden here too; custom field validation rules and prefilled defaults; quantity deals and bundle offers, because Komerza prices bulk by tier rather than buy-one-get-one; coupons, categories, whitelists and downloadable files.SellAuth supports multiple stores, so you pick the source store from a list after entering your key.
Imports: products with descriptions, slugs and visibility; variants with their own price, stock and delivery setup; serials and license keys per variant; checkout questions; bulk pricing tiers, and minimum and maximum order quantities; reviews with ratings, messages and replies; orders with line items, totals, statuses and payment references; customers folded together by email.Left behind: product images, because SellApp serves them from its own storage - re-upload those; store credit balances; coupons, sections, groups and blacklist rules.SellApp has no way to list your stores from an API key, so you type the store handle instead of picking from a list. It is the handle in your SellApp dashboard URL.
Imports: products with images, descriptions, pricing, custom fields and visibility; variants as first-class products, each with their own price and stock; serials and license keys for both base products and variants; delivery setup including instructions, dynamic webhooks and service text; reviews with ratings, messages and replies; orders with line items, statuses and delivered goods; customers with their join date and store credit balances.Left behind: delivery files, because Shoppex’s API has no download endpoint for them - re-upload those manually; subscriptions, since recurring billing cannot be transferred between platforms; coupons, categories and quantity deals.Shoppex rate limits hard. See If the migration stops early.
Imports: products and their variants, reviews, orders and customers.A Sellhub API key belongs to one store, so there is nothing to pick.
A migration stops at 1,000 products, which is the ceiling on every plan including Free. Anything past it is not imported, and both the completion screen and the email tell you exactly how many were left out. Almost no genuine catalogue reaches this.

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Before you start

If you are new to Komerza, create your account at dashboard.komerza.com - signing up creates your account and your first store together, on a free yourstore.mykomerza.com URL. Confirm your email, and your account starts on the Free plan. Already have an account? You don’t need another one. Add a store from the sidebar store selector → Create New Store, within your plan’s store limit: one store on Free, five on Premium, unlimited on Business. You need to be the store’s owner to run a migration.

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Running the migration

1

Open the Migration tab

In the dashboard, open the store selector → Store settings → Advanced → Migration (“Import your store data from another platform”).
2

Pick the platform and paste your key

Select the source platform and paste that platform’s API or authorization key, then press Continue. The key is used for the import and is not stored permanently. Generate a fresh key on the source platform rather than reusing one from an old email or note.
3

Choose the source store

SellAuth gives you a list to pick from. SellApp asks you to type your store handle. Sellhub and Shoppex are single-store, so this step is skipped.
4

Review what will be migrated

The screen lists what comes across for that platform and what does not. Read the second list - it is where the surprises are.
5

Start the migration

Press Start Migration. The import runs on our side, so you can close the tab. You will get a “Migration completed” email with counts of what was imported, or a “Migration failed” email.

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Watching it run

Once started, the tab shows live progress: the phase it is in (products, reviews, orders, customers, then saving to your store), a running count, the item it is working on, and a rough estimate of the time left once there is enough to base one on. “Next in line” or “3 migrations ahead of yours” means the run is queued. Only one migration runs at a time across the whole platform, so you can genuinely be waiting behind other merchants’ shops. The queue shows your position but never an estimated wait, because the run ahead of you might be fifty products or fifty thousand. “Connection lost” or “Live progress unavailable” is about the picture, not the migration. The import keeps running on our side and the email still arrives. The dashboard reconnects on its own, and there is a Try again now button if you would rather not wait. Refreshing the page or reopening the tab rejoins a run in progress.

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How it can finish

A finished migration is not simply pass or fail, and the screen colour tells you which of three you got.

Migration complete

Everything that could be imported was. The screen shows how many items are now in your store.

Finished with warnings

The import ran, but something is worth knowing about. The warnings are listed in full on screen and in the email.

Migration failed

Nothing further will be imported. Your existing store data has not been changed.
Warnings are specific and worth reading. Typical ones are “12 product(s) could not be imported from SellAuth and are missing from your store”, “4 review(s) could not be matched to a product and were left out”, or “Shoppex sent 40 product(s) but none could be imported, including 40 subscription product(s), which cannot carry recurring billing across”. A count of products that quietly failed is exactly the thing you want to see before you open for business. If a phase returned nothing at all, the email says so plainly rather than reporting a successful migration of zero - so “Sellhub reported no products for this store, so there was nothing to import” means the key or the store was wrong, not that the importer broke.

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How conflicts are handled

  • Duplicate product slugs are de-duplicated with -2, -3 suffixes, both within the import and against products already in your store.
  • Customers with the same email address are merged into one customer record. A customer who already exists in Komerza gains a relationship to this store rather than being duplicated.

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If the migration stops early

“Migration could not start: …” means the source platform rejected the key. The fix is nearly always the same: generate a brand-new API key on the source platform and run the migration again. Keys copied from old emails or notes are frequently expired or revoked. If you are on a multi-store platform, check the key belongs to the store you meant. “Migration stopped - rate limited” means the source platform throttled us past what we could wait out. Nothing is wrong with your key and there is nothing to fix - come back later and run it again. Anything imported before the limit was hit has been kept. Shoppex is the strictest of the supported platforms, so this is most likely there; retrying immediately can keep the key blocked, so leave it a while. Anything else is a failure on our side. Contact support with your store name and roughly when it ran.

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After the import

Migration brings your catalogue; it does not bring your storefront or your ability to take money. Work through these:

Check your products

Confirm counts, then check delivery items and stock modes on each variant.

Connect payment methods

Gateway configuration never migrates. Nothing sells until this is done.

Build your storefront

Use the builder, or embed checkout in a site you already have.

Connect your domain

Requires the Premium plan or above.
Press Reload store on the completion screen to see the imported data, or Migrate another store to run a second import.

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When to contact support

  • A freshly generated, valid API key from the source platform still fails.
  • Imported counts look wrong and the warnings don’t explain the difference.
  • You are migrating from a platform that isn’t listed.
  • You need data the tool doesn’t cover, such as coupons, categories or subscriptions.
Last modified on September 1, 2026