BigCommerce
BigCommerce has 19 themes tested on Themestested, for BigCommerce. Their median Google Lighthouse mobile speed score is 54 (desktop 71), with 0 of 19 scoring 90 or better on mobile. The fastest on mobile is Cornerstone Bold at 86. Last measured 2026-09-15, on each theme's own demo store.
| Theme | Platform | Price | Mobile · speed SEO a11y | Desktop · speed SEO a11y | Tested |
|---|---|---|---|---|---|
| Cornerstone Bold | BigCommerce | Free | 865193 | 985195 | 2026-09-12 |
| Cornerstone Warm | BigCommerce | Free | 855991 | 995991 | 2026-09-15 |
| Cornerstone Light | BigCommerce | Free | 829098 | 989099 | 2026-09-15 |
| Fortune Bright | BigCommerce | Free | 666175 | 726181 | 2026-09-12 |
| Fortune Contrast | BigCommerce | Free | 646178 | 716184 | 2026-09-15 |
| Fortune Highlight | BigCommerce | Free | 649284 | 719289 | 2026-09-15 |
| Fortune Minimal | BigCommerce | Free | 636175 | 726181 | 2026-09-12 |
| Capacity Warm | BigCommerce | $225 | 585973 | 865968 | 2026-09-12 |
| Capacity Clean | BigCommerce | $225 | 555970 | 815967 | 2026-09-15 |
| Capacity Bright | BigCommerce | $225 | 545970 | 895968 | 2026-09-12 |
| Merchant Classic | BigCommerce | $195 | 536173 | 696164 | 2026-09-15 |
| Merchant Light | BigCommerce | $195 | 506170 | 666164 | 2026-09-12 |
| Peak Warm | BigCommerce | $195 | 505983 | 695978 | 2026-09-15 |
| Peak Standard | BigCommerce | $195 | 485983 | 655977 | 2026-09-15 |
| Capacity Cool | BigCommerce | $225 | 475973 | 685970 | 2026-09-15 |
| Peak Light | BigCommerce | $195 | 465983 | 705977 | 2026-09-15 |
| Peak Bold | BigCommerce | $195 | 455982 | 695975 | 2026-09-15 |
| Merchant Bold | BigCommerce | $195 | 446176 | 706174 | 2026-09-15 |
| Merchant Bright | BigCommerce | $195 | 406176 | 696166 | 2026-09-15 |
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-bold"><img src="https://themestested.com/badge/bigcommerce/cornerstone-bold.svg" alt="Cornerstone Bold 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.