The question of whether Squarespace is more customizable than Wix depends on various factors, including the specific needs of your project, your level of technical expertise, and what you mean by "customizable."

1. Template Customization

Squarespace: - Design Quality: Squarespace is renowned for its professionally designed templates, which are highly polished and visually appealing. - Flexibility: While these templates look great out of the box, they are somewhat rigid when it comes to customization. You can make adjustments to fonts, colors, and layouts, but deeper customizations often require knowledge of CSS. - Ease of Use: Squarespace’s customization interface is intuitive and user-friendly, making it easy for beginners to make basic modifications without much hassle.

Wix: - Design Quality: Wix also offers a wide variety of templates, although opinions on their aesthetic quality can vary. Some users find them less polished than those provided by Squarespace. - Flexibility: Wix outshines Squarespace in terms of drag-and-drop customization. You can move elements freely around the page, allowing for more granular control over the design. - Ease of Use: The drag-and-drop editor is very intuitive, suitable for users of all skill levels. However, the high level of freedom can lead to inconsistent designs if not handled carefully.

2. Code Access and Developer Options

Squarespace: - Developer Mode: Squarespace offers a "Developer Platform" providing more control over the site's code (HTML, CSS, JS). This allows for high levels of customization but requires coding skills. - Limitations: Even with Developer Mode, Squarespace is somewhat restrictive compared to true open-source platforms. You’re still bound to their platform’s overall design and structure.

Wix: - Velo by Wix: Wix offers Velo, a powerful development platform that allows you to add custom JavaScript code, APIs, and more. This makes it possible to create highly customized web applications. - Limitations: Although Velo provides more customization options, it comes with a steeper learning curve.

3. Functional Customization

Squarespace: - Built-In Features: Squarespace has strong built-in features (e-commerce, scheduling, blogging, etc.) that require little to no additional customization. - Extensions: It has a growing library of third-party extensions, but it’s not as extensive as what’s available with Wix.

Wix: - App Market: Wix has a robust App Market that allows you to add various functionalities to your site (e-commerce tools, booking systems, form builders, etc.). This enables you to customize your site’s functionality even further. - Workflows: Wix's customization extends to workflows using tools like Ascend, which can help automate various business processes directly from your website.

4. SEO and Performance Customization

Squarespace: - Built-In SEO Tools: Squarespace offers built-in SEO tools that are user-friendly. However, it is less flexible compared to the extensive options available on platforms like WordPress or Wix. - Performance: Squarespace’s templates are optimized for performance out-of-the-box, reducing the need for extensive performance tuning.

Wix: - SEO Wiz: Wix provides an SEO Wiz tool that guides you through the process of optimizing your site for search engines. It also offers more advanced SEO settings for those who require them. - Performance: Wix has made significant improvements in performance optimization, though its heavily customizable nature may sometimes affect loading speeds if not handled correctly.

5. User Experience and Support

Squarespace: - Support: Squarespace provides 24/7 customer support, including live chat and comprehensive documentation, making it easier for users to resolve any issues. - Community: The platform has a smaller, but dedicated, community of users and developers.

Wix: - Support: Wix offers 24/7 support and has a large, active community forum along with detailed help documentation. - Learning Resources: Due to its larger user base, you are likely to find more third-party tutorials and courses focusing on Wix.

Conclusion:

• Choose Squarespace if you prefer a more structured and professional-looking design with moderate customization options. It’s ideal for users who prioritize aesthetics and simplicity.
• Choose Wix if you want extensive design flexibility, a wide array of apps, and advanced developer options. It caters well to users who require deep customization and are comfortable with a steeper learning curve.

In summary, Wix generally offers more customization options than Squarespace, but the best choice depends on what you need for your specific project.