As of 2026-09-14, 34 Squarespace themes have been tested with Google Lighthouse on their own demo stores; 0 (0%) score 90 or better for mobile speed. The highest is Clune by Squarespace at 78, then Pazari by Squarespace at 70, and Just My Type by Squarespace at 67.
Squarespace themes tested for speed, SEO and accessibility
Fastest themes on mobile| Presets | MobileDesktop |
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Questions people ask
What is the fastest Squarespace theme in 2026?
On 2026-09-14, the highest mobile speed score among the 34 Squarespace themes we have tested is Clune by Squarespace at 78 out of 100, measured with Google Lighthouse on its demo store. Rankings change as themes are re-tested, so the live table above is the current answer.
How are Squarespace themes tested?
Each theme's own demo store is run through Google's PageSpeed Insights API (Lighthouse) on mobile and desktop, for the home page and, where the platform has them, a collection page and a product page. A theme's headline score is the median of its presets; a preset's is the mean of its pages. Every run is kept, so scores have a history and are re-measured continuously.
What is a good Lighthouse score for a Squarespace theme?
Google's bands are 90–100 good, 50–89 needs improvement, 0–49 poor. The median mobile speed score across tested Squarespace themes is 55, and 0 of 34 (0%) reach 90 or better. Mobile scores run well below desktop for the same theme because Lighthouse simulates a mid-range phone on a slow connection.
What is the fastest free Squarespace theme?
Among free Squarespace themes we have tested, Clune by Squarespace has the highest mobile speed score at 78. The full list is at /squarespace/free.