Content Management Systems Show Strong Performance in Latest INP Rankings

New data reveals Squarespace leads major content management systems for modern website development in Interaction to Next Paint (INP) scores, with 96.07% of its sites achieving good performance ratings. The findings demonstrate widespread improvements across all major platforms in this crucial user experience metric.

Understanding INP's Impact on Web Performance

Interaction to Next Paint measures how quickly websites respond to user actions like clicks and keystrokes, providing a comprehensive view of page responsiveness. Unlike its predecessor metric, First Input Delay, INP evaluates all user interactions throughout a page visit to deliver a more accurate assessment of performance. For businesses considering a new platform, understanding the key advantages of implementing a content management system alongside performance metrics is crucial for success.

Platform Performance Analysis

Top Performers

Squarespace maintains its position at the top with an impressive 96.07% of sites achieving good INP scores, followed closely by BigCommerce at 95.29% and Duda at 93.81%. These platforms significantly outperform their competitors in delivering responsive user experiences.

Monthly Improvements

All major CMS platforms showed positive momentum from June to July 2025:

• Joomla led monthly improvements with a 1.12% increase
• WordPress followed with 0.88% growth
• Wix and Drupal showed gains of 0.70% and 0.64% respectively

Ecommerce Platform Excellence

Despite the additional resource demands of online stores, ecommerce platforms performed remarkably well:

• BigCommerce: 95.29%
• Shopify: 89.58%
• WooCommerce: 87.99%

The strong showing of ecommerce platforms is particularly noteworthy given their typically higher resource requirements for features, images, and videos. As businesses transition towards next-generation web technologies and Web 3.0 implementation, these performance metrics become increasingly important.

Practical Implications

Organizations choosing a new CMS can use these rankings to inform their decision-making process, particularly if site responsiveness is a priority. Current website owners can compare their site's INP performance against industry standards and identify potential areas for improvement. Understanding INP scores helps businesses better plan for optimal user experiences and potentially higher conversion rates.

According to Google's Web Vitals documentation, maintaining strong INP scores directly correlates with improved user engagement and reduced bounce rates.

The data shows that while performance varies across platforms, even lower-ranked systems like Joomla maintain respectable scores above 84%. This indicates that major CMS platforms are generally well-optimized for modern web performance standards, though there remains room for improvement across the industry.