Legacy Shopify accounts show up more often on paid themes

StoreInspect’s September analysis found legacy Shopify customer account signals on 10.0% of identified paid-theme domains versus 2.1% of free-theme domains. The sample suggests theme class can be a useful early signal for agencies tracking possible migration needs, but it does not show why merchants are staying on legacy accounts.

Why it matters: - The gap suggests merchants using paid themes are far more likely to still rely on Shopify’s legacy customer accounts. - That matters for agencies and ecommerce teams planning theme updates, account migrations and support work. - StoreInspect said theme classification alone does not prove a merchant needs migration help or is buying services.

What happened: - StoreInspect released a September analysis of public Shopify customer account signals. - The study found legacy account modes on 1,613 of 16,084 identified paid-theme domains, or 10.0%. - Free-theme domains showed legacy signals on 1,204 of 57,628 domains, or 2.1%. - The paid-theme group’s legacy share was about 4.8 times higher. - StoreInspect used retained observations from Aug. 29 through Sept. 4, 2026. - The sample covered 107,048 domains in StoreInspect’s database, excluding domains already marked confirmed dead. - Of those, 86,501 had an identified legacy or newer account mode. - The remaining 20,547 were excluded because checks were inconclusive, requests failed or no account entry point was available.

The details: - The dataset included 4,236 legacy detections across the identified account-mode group. - The analysis comes after Shopify’s Feb. 26 deprecation announcement. - Shopify also required new themes and updates submitted to the Shopify Theme Store on July 30 to include the newer account component. - Shopify’s deprecation notice says upgrading a legacy-account store to a theme without legacy account templates automatically switches the store to newer customer accounts. - StoreInspect rechecked 64 sampled domains in a browser on Sept. 5. - All 20 sampled legacy detections showed a Shopify legacy customer login form. - All 20 sampled newer-account detections reached newer customer account flows. - The remaining browser checks covered unresolved or unavailable results. - No customer login was submitted.

Between the lines: - The results point to a correlation between paid themes and older account infrastructure, not a direct cause. - The sample reflects StoreInspect’s collection activity, not a random cross-section of all Shopify merchants. - Counts refer to domains, not unique businesses. - The study does not measure migration rates, account usage or the reasons merchants keep legacy accounts.

What’s next: - StoreInspect said the full study includes denominators, exclusions, browser-check findings and migration considerations. - Agencies can use the findings as a starting point for reviewing account dependencies before theme updates. - Merchants still on legacy accounts may face more pressure to assess whether their current theme setup supports Shopify’s newer account flow.

The bottom line: - Paid-theme domains in StoreInspect’s sample were much more likely to show legacy Shopify customer accounts, but the data stops short of explaining why.