Same Law Different Platforms
Shopify and PrestaShop sit under exactly the same legal obligation: since June 2025 the European Accessibility Act requires e-commerce services to conform to EN 301 549 / WCAG 2.1 AA, with no micro-enterprise exemption for online shops. What differs is where the defects come from and who can fix them. Shopify concentrates control in a hosted theme layer with Liquid templates and an app ecosystem; PrestaShop gives you self-hosted core templates, a back office, and a marketplace of modules. The compliance work follows those architectures.
Same Standard
EN 301 549 incorporating WCAG 2.1 Level AA applies to both. Payment providers and marketplaces increasingly ask merchants of either platform for documented conformance.
Theme Dominance
On both platforms the active theme controls nearly all rendered HTML — heading hierarchy, focus styles, contrast and form labels are theme decisions, not platform decisions.
Third-Party Risk
Shopify apps and PrestaShop modules both inject widgets (filters, reviews, popups) with wildly varying accessibility quality. Each needs its own review.