Quick answer: the alternatives that matter: WooCommerce (open-source control, you run it), BigCommerce (closest SaaS twin, more built-in), Squarespace/Wix (when the store is secondary to the site), Webflow (design-first), Square Online (POS-first), and Adobe/Salesforce (enterprise). Each fixes one Shopify complaint and introduces its own tax. And because replatforming burns SEO equity, the honest first question is whether your complaint is actually a platform problem.

Yes, we build a Shopify app, and yes, this is still a real map — because merchants who replatform for the wrong reason come back poorer, and the ones with the right reason deserve a straight answer. By segment:

The main event: WooCommerce and BigCommerce

  • WooCommerce — the largest ecommerce platform on Earth by store count, free as software, running on WordPress. You gain total ownership: any URL structure, any customization, no platform fees. You assume total responsibility: hosting, security, updates, plugin conflicts, and the hours those consume. The right choice for content-heavy operations already living in WordPress and for anyone whose complaint is "I want control." The wrong choice for anyone who wants commerce infrastructure to be someone else's job — which is the product Shopify actually sells.
  • BigCommerce — the closest like-for-like: SaaS, similar pricing, more features built-in where Shopify reaches for apps (real category filtering, B2B basics, no platform transaction fees on any gateway), and friendlier URL customization. Trade-offs: a far smaller app and theme ecosystem, and annual sales thresholds that force plan upgrades. The strongest "same shape, different trade-offs" candidate on the list.

The site-builders: Squarespace, Wix, Square Online

For businesses where the site leads and the store follows — portfolios, restaurants, services with merch — Squarespace (design polish), Wix (flexibility), and Square Online (free tier, native POS sync) deliver simpler commerce at lower entry cost. Their ceiling arrives with catalog scale: hundreds of SKUs, variants, multi-channel inventory, and serious store SEO are where the dedicated platforms pull away. Know which side of that line you live on.

The specialists

  • Webflow Ecommerce — for design-obsessed brands with modest catalogs; unmatched visual control, thinner commerce depth.
  • Ecwid — a store you embed into any existing site; the "add commerce without moving" play.
  • Adobe Commerce (Magento) / Salesforce Commerce Cloud — enterprise machinery for enterprise budgets and dev teams; nobody reading a comparison page is their buyer today.
  • The marketplaces — Amazon and Etsy compete for the same sellers with the opposite deal: their traffic, their rules, their customer data. Most serious brands run both a marketplace presence and an owned store rather than choosing.

The SEO angle, since that is our beat

Platform choice moves SEO less than forums suggest — every serious contender covers the fundamentals, and rankings come from execution: unique meta at scale, schema, content, links. The real platform differences: Shopify's rigid URL prefixes (/products/, /collections/) offend tidy minds but cost little in practice; WooCommerce's ceiling is highest and so is its variance (bad hosting = bad Core Web Vitals); site-builders thin out at catalog scale. The genuinely expensive SEO event is the migration itself — every replatform gambles years of accumulated equity on perfect redirect execution. Which is why the decision rule is:

Leave for structure, stay for irritations

Structural reasons to move: you need WordPress-native content operations (WooCommerce), you are paying app subscriptions for things a rival builds in (BigCommerce), the store is genuinely secondary (site-builders), or enterprise procurement said so. Irritations to fix in place: transaction fees (Shopify Payments), a feature gap (an app), theme fatigue (a theme), and SEO underperformance — which follows the work, not the platform. If you stay, the audit that shows what execution is actually missing is free; if you go, execute the redirect map like the equity depends on it, because it does.