As of 2026-09-15, 239 BigCommerce themes have been tested with Google Lighthouse on their own demo stores; 40 (17%) score 90 or better for desktop speed. The highest is Cornerstone Warm by BigCommerce at 99, then Cornerstone Bold by BigCommerce at 98, and Cornerstone Light by BigCommerce at 98.
BigCommerce themes ranked by desktop speed
Fastest themes on mobile| Presets | MobileDesktop |
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BigCommerce theme speed: questions people ask
What is the fastest BigCommerce theme in September 2026?
As of September 2026 (measured 2026-09-15), the fastest BigCommerce theme on desktop is Cornerstone Warm by BigCommerce, with a Google Lighthouse speed score of 99 out of 100, followed by Cornerstone Bold by BigCommerce at 98 and Cornerstone Light at 98. 239 BigCommerce themes were tested on their own demo stores; the ranking above is live and changes as themes are re-tested.
What is the fastest BigCommerce theme on mobile?
On mobile, Cornerstone Bold by BigCommerce has the highest speed score in September 2026 at 86 out of 100, then Cornerstone Warm at 85. Mobile is the score that matters for search ranking and for most shoppers; the mobile ranking is one click away in the toolbar.
What is the best free BigCommerce theme for speed in September 2026?
Among free BigCommerce themes, Cornerstone Warm by BigCommerce has the highest desktop speed score in September 2026 at 99 out of 100; Cornerstone Bold is next at 98. 12 of the 239 tested BigCommerce themes are free; the full list is at /bigcommerce/free.
Is the most popular BigCommerce theme fast?
The most popular BigCommerce theme by marketplace usage is Revo by magentech, and in September 2026 it scores 70 out of 100 for desktop speed, against 99 for the fastest theme, Cornerstone Warm. Kido (87) and TopDeal (81) are the next most popular. Popularity is a signal of trust, not of speed.
What speed score does a typical BigCommerce theme get?
In September 2026, the median desktop Lighthouse performance score across 239 tested BigCommerce themes is 82 out of 100, and 40 (17%) reach Google's "good" band of 90 or better. Google's bands are 90–100 good, 50–89 needs improvement and 0–49 poor.
Which BigCommerce themes score 90 or better for desktop speed?
40 BigCommerce themes score 90 or better for desktop speed in September 2026, led by Cornerstone Warm (99), Cornerstone Bold (98), Cornerstone Light (98), Covent Garden Bright (97), Camden Hardware (97), Epic Superstore Fashion (97), Orbit Warm (96) and Orbit Dark (96). Scores are medians across each theme's tested presets.
Which BigCommerce theme has the best Core Web Vitals?
On its demo store's home page in September 2026, Vault Natural by Lonestar Templates has the fastest Largest Contentful Paint among the BigCommerce themes scoring 90 or better: 734 ms LCP on desktop with a Cumulative Layout Shift of 0.009. The lowest LCP overall is Noble Bold at 692 ms. Google's thresholds are 2.5 s for LCP and 0.1 for CLS; every theme's page lists its vitals per device.
Is Revo fast?
Revo by magentech scores 70 out of 100 for desktop speed and 45 on mobile in September 2026, measured with Google Lighthouse on its demo store. That places it at number 195 of 239 tested BigCommerce themes. Its page at /theme/bigcommerce/tf-revo-multipurpose-stencil-responsive-bigcommerce-theme-21591378 shows every page, preset and the audits behind the number.
Is Cornerstone Warm fast?
Cornerstone Warm by BigCommerce scores 99 out of 100 for desktop speed and 85 on mobile in September 2026, measured with Google Lighthouse on its demo store. That places it first of 239 tested BigCommerce themes. Its page at /theme/bigcommerce/cornerstone-warm shows every page, preset and the audits behind the number.
Cornerstone Warm vs Cornerstone Bold: which is faster?
In September 2026, Cornerstone Warm scores 99 and Cornerstone Bold scores 98 for desktop speed; on mobile it is 85 against 86. Two points is inside Lighthouse's run-to-run variation, so treat them as level on this measure. Pick both in the rankings and press Compare for every score side by side.
Which BigCommerce theme vendor makes the fastest themes?
Among vendors with two or more tested BigCommerce themes, Epic Design Labs has the highest median desktop speed score in September 2026: 92 across 3 themes. Vendor pages list every theme a vendor has on the rankings.
How many BigCommerce themes have been tested, and how often are the scores updated?
239 BigCommerce themes have Lighthouse scores as of 2026-09-15. Every theme is re-tested on a schedule set by its popularity — the most used every week, the long tail every one to two months — and every run is kept, so a theme's page shows its history. New themes are picked up from the marketplaces daily.
Does theme speed matter for a BigCommerce store?
Yes. Page speed is part of Google's ranking systems through Core Web Vitals, and slower pages convert fewer visitors. The theme sets the floor: apps, images and tracking scripts only add to what it loads. A theme that scores 90 or better on mobile on its own demo leaves room for a real store; one that scores 50 on an empty demo has none. Test your own store at /test-my-store.
How are BigCommerce themes tested for speed?
Each theme's own demo store is run through Google's PageSpeed Insights API (Lighthouse) on a simulated mobile phone and on desktop, for the home page and, on store platforms, a collection page and a product page. A theme's score is the median of its presets; a preset's is the mean of its pages. Dead, password-protected and cloaked demos are excluded before they can score. The full method is at /methodology.