BigCommerce
BigCommerce has 19 themes tested on Themestested, for BigCommerce. Their median Google Lighthouse mobile speed score is 57 (desktop 79), with 0 of 19 scoring 90 or better on mobile. The fastest on mobile is Cornerstone Warm at 89. Last measured 2026-11-10, on each theme's own demo store.
| Theme | Platform | Price | Mobile · speed SEO a11y | Desktop · speed SEO a11y | Tested |
|---|---|---|---|---|---|
| Cornerstone Warm | BigCommerce | Free | 895991 | 995991 | 2026-11-07 |
| Cornerstone Bold | BigCommerce | Free | 885194 | 995195 | 2026-11-08 |
| Cornerstone Light | BigCommerce | Free | 869098 | 999099 | 2026-11-08 |
| Capacity Cool | BigCommerce | $225 | 645973 | 815970 | 2026-11-10 |
| Fortune Highlight | BigCommerce | Free | 649284 | 779289 | 2026-11-10 |
| Fortune Contrast | BigCommerce | Free | 636178 | 686184 | 2026-11-10 |
| Fortune Bright | BigCommerce | Free | 626175 | 796181 | 2026-11-08 |
| Capacity Clean | BigCommerce | $225 | 595970 | 835967 | 2026-11-10 |
| Fortune Minimal | BigCommerce | Free | 596175 | 716181 | 2026-11-07 |
| Peak Warm | BigCommerce | $195 | 575984 | 815978 | 2026-11-10 |
| Capacity Warm | BigCommerce | $225 | 565973 | 825968 | 2026-11-07 |
| Merchant Bright | BigCommerce | $195 | 566176 | 746167 | 2026-11-10 |
| Peak Bold | BigCommerce | $195 | 565981 | 735975 | 2026-11-10 |
| Merchant Classic | BigCommerce | $195 | 556173 | 836164 | 2026-11-10 |
| Merchant Light | BigCommerce | $195 | 556170 | 736165 | 2026-11-07 |
| Peak Standard | BigCommerce | $195 | 545984 | 796677 | 2026-11-10 |
| Merchant Bold | BigCommerce | $195 | 536176 | 796176 | 2026-11-10 |
| Peak Light | BigCommerce | $195 | 535984 | 685977 | 2026-11-10 |
| Capacity Bright | BigCommerce | $225 | 505970 | 845968 | 2026-11-07 |
Sorted by mobile speed. Each theme's score is the median of its tested presets; open a theme for its pages, history and the audits behind the number.
Show your scores
Any of these themes can carry its live score on your own site. The badge is an image that always shows the current number, links back to the theme's page here, and updates as the theme is re-tested.
<a href="https://themestested.com/theme/bigcommerce/cornerstone-warm"><img src="https://themestested.com/badge/bigcommerce/cornerstone-warm.svg" alt="Cornerstone Warm speed score on Themestested" height="20"></a>
Swap the theme in the address for any of yours. Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.