Yes. An SEO company can work with a Squarespace site, and many do. Squarespace is a hosted website builder, so an SEO company will not have the same server-level access it would on a self-hosted platform, but the platform exposes enough controls to run a real optimization program. The work looks a little different from SEO on a more open system, but the core goals of ranking, traffic, and conversions are the same.
What Squarespace handles reasonably well
Squarespace covers several technical basics automatically, which removes work that would otherwise need to be done by hand. Every Squarespace plan includes a free SSL certificate, so sites load over HTTPS without setup. Templates are mobile responsive by default, which matters because Google evaluates the mobile version of a page. The platform also generates an XML sitemap automatically, supports custom meta titles and descriptions, allows image alt text, lets you set 301 redirects, and connects to Google Search Console.
The templates themselves are generally clean and consistent, which means heading structure and layout tend to be reasonable out of the box. Squarespace has also added newer tools that audit titles, descriptions, and alt text and flag missing items. These checks are useful for catching gaps, though they tell you what is missing more than why a change will help.
The real strengths and limits
The strength of Squarespace for SEO is that the foundation is solid and hard to break. A business does not need a developer to keep SSL valid, keep the site mobile friendly, or maintain a sitemap. For many small and mid-size businesses competing in moderate-difficulty niches, that foundation is enough to compete on the same terms as competitors, provided the content and strategy are strong.
The limits show up in advanced technical control. Squarespace gives you less direct control over structured data and schema markup than a more open platform, and there is no server-level access to fine-tune caching, headers, or redirect rules. Customization of certain technical elements is constrained by what the platform chooses to expose, and the selection of third-party SEO tools is smaller than on platforms with large plugin ecosystems. Page speed can also be a constraint: Squarespace pages can carry more scripts and weight than a lean custom build, so Core Web Vitals scores depend heavily on keeping designs simple and media compressed. Most Squarespace sites do pass Core Web Vitals, but the ceiling for speed tuning is lower than on a platform you fully control.
What an SEO company focuses on within the platform
Because the platform handles the basics, an SEO company working on Squarespace usually spends its time where the real gains are. That means keyword research and a content plan matched to what the business can actually rank for, then writing or improving pages and blog posts to match search intent. It means setting clear, well-written meta titles and descriptions, adding descriptive alt text, organizing pages into a logical structure, and using clean URL slugs.
A good SEO company will also work within the platform’s constraints rather than against them. It will add schema markup where Squarespace allows code injection, keep page designs light to protect load speed, compress and properly size images, fix broken links and redirect chains, and monitor performance through Google Search Console and analytics. For a business that depends on local customers, it will also handle local SEO, which lives largely outside the platform: a Google Business Profile, consistent business information across directories, and reviews.
The bottom line
Squarespace is not a barrier to hiring an SEO company. It is a capable platform for foundational and competitive SEO in most niches, with strong defaults and a few real ceilings on advanced technical work. If a business is in a highly competitive market that demands deep technical SEO at scale, those platform limits become more relevant and worth discussing before committing. For most businesses, the platform is fine, and results come down to the quality of the content and strategy, not the choice of Squarespace itself. When evaluating an SEO company, it is fair to ask whether it has worked on Squarespace before and how it plans to handle the platform’s specific limits.