WordPress is objectively better for SEO in most client situations, though the gap has narrowed considerably. WordPress gives you granular control over technical SEO elements that matter: you can directly edit robots.txt, control XML sitemaps, manage internal linking structure, optimize page speed through plugin selection, and implement schema markup with full flexibility. You also control your server environment and caching strategy. With Squarespace, you're constrained by what the platform allows, which means accepting their defaults even when those defaults aren't optimal for your specific SEO goals.
The practical difference emerges in competitive niches where ranking requires precision. If a client needs aggressive internal linking strategy, custom robots.txt rules to prevent crawl waste, or specific server-side redirects, WordPress handles these natively while Squarespace either restricts them or makes them difficult. WordPress also works seamlessly with specialized SEO tools—you can integrate tracking pixels, modify meta tags through plugins, run split tests on title tags, and manage content at scale. Squarespace's API and customization options have improved, but you're still working within their constraints.
That said, Squarespace's disadvantage isn't as severe as it was five years ago. Their platform handles page speed reasonably well now, generates clean HTML, and automatically implements basic best practices like mobile responsiveness and HTTPS. For local SEO clients in low-competition verticals or service-based businesses competing mostly on brand strength and local signals, Squarespace's user-friendly interface and built-in design quality might actually deliver better results than a poorly configured WordPress site. A well-optimized Squarespace site will outrank a badly built WordPress site every time.
The real answer for your agency: use WordPress as your default unless a specific client constraint makes Squarespace genuinely preferable (like they demand DIY editing with zero technical knowledge, or they have a tiny budget). WordPress's flexibility means you're not making compromises on behalf of your clients' long-term ranking potential. You control the technical foundation, which matters increasingly as Google refines ranking signals. For designers specifically, Squarespace offers faster project delivery and beautiful defaults, but you're trading velocity for limited optimization optionality down the road.
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