Shopify and BigCommerce are the two largest hosted e-commerce platforms for small and mid-sized merchants, and both claim to support WCAG compliance out of the box. In practice, there are meaningful differences between how the two platforms handle default theme accessibility, how much of the storefront merchants can customize safely, and how much legal exposure a non-technical store owner inherits when they pick one or the other. This matters because e-commerce is the single most sued industry under ADA Title III in the United States — roughly one in four digital accessibility lawsuits in 2025 targeted online retailers, and small Shopify and BigCommerce stores are increasingly being named in demand letters. If you are choosing between the two platforms for a new store, or considering a migration, this comparison walks through the accessibility implications of each, covering default themes, checkout flow, admin experience, app and widget risks, and the accessibility statements each vendor publishes. We focus on what small business owners without a dedicated developer can actually control.

At a Glance

Feature Shopify BigCommerce
Default theme WCAG 2.1 AA compliance Strong on Shopify-built themes (Dawn, Craft, Sense); inconsistent on third-party themes Generally strong on Stencil-based themes; fewer themes but fewer obvious violations
Checkout accessibility Centrally controlled by Shopify and audited externally — merchants cannot easily break it More merchant customization allowed, which increases both flexibility and risk of regressions
Published accessibility statement / VPAT Accessibility statement for admin and checkout; no VPAT for individual stores Accessibility statement plus VPAT for storefront and admin
App ecosystem and widget risk Very large app store; high variability in accessibility quality; widgets are a top lawsuit driver Smaller marketplace; more features in core; fewer widget pile-ups but also fewer audited alternatives
Admin UI keyboard and screen reader support Mature, actively maintained, well-labeled forms and landmarks Improved significantly since 2024 but still trails Shopify on some complex admin screens
Ease of use for non-technical merchants Very high — most merchants can launch without a developer Moderate — more powerful but generally expects more technical comfort
Typical lawsuit exposure High — Shopify stores are frequently named in ADA Title III demand letters, usually due to third-party widgets or inaccessible themes Moderate — fewer BigCommerce stores in public lawsuit data, partly due to smaller merchant base
EAA readiness for EU customers Checkout and admin have documented conformance; merchant storefront is merchant responsibility VPAT and EAA guidance available for enterprise customers; merchant storefront is merchant responsibility

Shopify

Type: Hosted e-commerce SaaS platform Pricing: Basic $39/month, Shopify $105/month, Advanced $399/month, Shopify Plus from $2,300/month Best for: Small and mid-sized merchants who want a well-tested checkout, a large app ecosystem, and access to modern accessible themes — provided they are willing to audit the apps and widgets they install.

Pros

  • Dawn and other Shopify-built themes released since 2021 score well on automated WCAG 2.1 AA checks and ship with proper heading structure, visible focus states, and labeled form fields out of the box
  • Checkout is controlled entirely by Shopify and is regularly audited by Deque Systems — most stores cannot accidentally break checkout accessibility even when customizing the storefront
  • Large theme and app ecosystem means accessibility-focused alternatives exist for almost every feature, and the Shopify app store now flags accessibility concerns in some listings
  • Published accessibility statement covers the Shopify admin and checkout, giving merchants documentation they can reference in demand-letter responses

Cons

  • The majority of free and paid themes in the Shopify Theme Store are built by third parties with inconsistent accessibility quality — picking a visually striking theme can introduce serious violations
  • Third-party apps and widgets (reviews, popups, live chat, upsells) are the leading source of accessibility lawsuits against Shopify stores and are not vetted by Shopify
  • The Liquid templating system and section editor make it very easy for merchants to add decorative images without alt text or break heading hierarchy without realizing it
  • Shopify does not perform WCAG audits on individual merchant stores — compliance responsibility rests entirely with the merchant, a fact often buried in the terms of service

BigCommerce

Type: Hosted e-commerce SaaS platform Pricing: Standard $39/month, Plus $105/month, Pro $399/month, Enterprise custom pricing Best for: Mid-market merchants and B2B stores that need complex catalog, multi-storefront, or deep customization capabilities and have access to a developer who can audit and maintain the storefront.

Pros

  • The Stencil theme framework produces cleaner semantic HTML than many Shopify themes, which tends to result in fewer automated WCAG violations on default installs
  • Built-in features like multi-storefront, B2B pricing, and complex catalogs are included in core rather than bolted on via third-party apps, reducing the widget sprawl that drives a11y issues
  • Published accessibility statement and VPAT (Voluntary Product Accessibility Template) for the storefront and admin give merchants documentation appropriate for enterprise procurement and compliance reviews
  • API-first architecture makes it easier for agencies to build a custom, audited storefront on top of BigCommerce without fighting the platform

Cons

  • Smaller theme marketplace means fewer pre-built accessible themes to choose from compared to Shopify — many merchants end up on older themes that predate recent accessibility improvements
  • Admin UI has historically been less polished for keyboard-only and screen reader use than Shopify admin, though BigCommerce has invested heavily in this since 2024
  • Checkout customization options are more permissive than Shopify, which gives flexibility but also allows merchants or developers to introduce accessibility regressions that Shopify would not permit
  • App ecosystem is smaller, so accessibility-audited alternatives for things like reviews and pop-ups are less common — merchants sometimes end up on the only available app regardless of its a11y quality

Our Verdict

For most small business owners, Shopify is the pragmatic choice: its Shopify-built themes are accessible enough by default, its checkout is externally audited, and the app store — while still a risk — at least has accessible alternatives for most use cases. The catch is that the majority of accessibility lawsuits against Shopify stores trace back to two things the merchant controls directly: the theme they chose and the third-party apps they installed. Before launching, run a scan on your chosen theme and every third-party widget, and replace any that introduce violations. BigCommerce makes more sense for mid-market and B2B merchants who already have developer support and want a platform with a VPAT, stronger defaults in the Stencil framework, and fewer widgets bolted onto the storefront. Neither platform is ADA-compliant on your behalf — both place compliance responsibility on the merchant in their terms of service. Whichever you pick, publish an accessibility statement, run a real WCAG 2.2 audit before launch, and re-audit every time you install a new app or change themes.

Further Reading

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