State of BigCommerce theme speed — September 2026
As of 2026-09-31, 232 BigCommerce themes have Google Lighthouse speed scores on Themestested, measured on their own demo stores. The median mobile speed score is 66 (desktop 86); 0 themes (0%) score 90 or better on mobile. The highest is Cornerstone Warm by BigCommerce at 89, then Artify Electronics at 88 and Cornerstone Bold at 88. Among the themes first tested in September 2026, the best for mobile speed is Cornerstone Warm at 89. The biggest improvement is Merchant Bright, up 32 points to 62 since 2026-09-15.
Top BigCommerce themes for speed
Highest mobile speed score as of 2026-09-31; the desktop score beside it. A theme's score is the median of its tested presets.
| Theme | Mobile | Desktop | Price | |
|---|---|---|---|---|
| 1 | Cornerstone Warm · BigCommerce | 89 | 99 | Free |
| 2 | Artify Electronics · 1Center | 88 | 91 | $150 |
| 3 | Cornerstone Bold · BigCommerce | 88 | 99 | Free |
| 4 | Cornerstone Light · BigCommerce | 86 | 99 | Free |
| 5 | Covent Garden Contemporary · Flair Consultancy | 84 | 72 | $235 |
| 6 | Camden Catalog · Flair Consultancy | 83 | 79 | $235 |
| 7 | Eyeva Sofas · Papathemes | 83 | 92 | $295 |
| 8 | Kansha CBD · Papathemes | 83 | 88 | $245 |
| 9 | Camden B2B · Flair Consultancy | 82 | 99 | $235 |
| 10 | Vault Natural · Lonestar Templates | 82 | 91 | Free |
New this month
Themes first tested in September 2026, best first.
| Theme | Mobile | Desktop | Price | |
|---|---|---|---|---|
| 1 | Cornerstone Warm · BigCommerce | 89 | 99 | Free |
| 2 | Artify Electronics · 1Center | 88 | 91 | $150 |
| 3 | Cornerstone Bold · BigCommerce | 88 | 99 | Free |
| 4 | Cornerstone Light · BigCommerce | 86 | 99 | Free |
| 5 | Covent Garden Contemporary · Flair Consultancy | 84 | 72 | $235 |
| 6 | Camden Catalog · Flair Consultancy | 83 | 79 | $235 |
| 7 | Eyeva Sofas · Papathemes | 83 | 92 | $295 |
| 8 | Kansha CBD · Papathemes | 83 | 88 | $245 |
| 9 | Camden B2B · Flair Consultancy | 82 | 99 | $235 |
| 10 | Vault Natural · Lonestar Templates | 82 | 91 | Free |
Trending
The biggest changes in mobile speed between a theme's latest test and its last test at least a week earlier. A move of 3 points or more counts; Lighthouse varies by a point or two between runs.
| Theme | Mobile | Desktop | Price | Change | From → to | |
|---|---|---|---|---|---|---|
| 1 | Merchant Bright · BigCommerce | 56 | 74 | $195 | +32 | 30 → 62 since 2026-09-15 |
| 2 | Terra Dark · epicShops | 80 | 92 | $300 | +29 | 42 → 71 since 2026-09-20 |
| 3 | Next Furniture · Webibazaar | 68 | 83 | $195 | +25 | 49 → 74 since 2026-09-15 |
| 4 | Roots Original · Weizen Young | 70 | 90 | Free | +24 | 48 → 72 since 2026-09-15 |
| 5 | Dinosaur Woman · Papathemes | 51 | 73 | $395 | +24 | 22 → 46 since 2026-09-15 |
| 6 | Solar Fashion · epicShops | 68 | 82 | $100 | +19 | 52 → 71 since 2026-09-12 |
| 7 | Supermarket Modern · Papathemes | 68 | 89 | $195 | +19 | 39 → 58 since 2026-09-15 |
| 8 | Minimal Serene · BigMadness | 49 | 60 | $420 | +19 | 38 → 57 since 2026-09-15 |
| 9 | Capri Evoke · Nixir | 56 | 65 | $249 | +17 | 32 → 49 since 2026-09-15 |
| 10 | Kings Road Bespoke · Flair Consultancy | 77 | 88 | $235 | +15 | 36 → 51 since 2026-09-15 |
Falling
| Theme | Mobile | Desktop | Price | Change | From → to | |
|---|---|---|---|---|---|---|
| 1 | Clariss Electronics · Gordonbyte | 71 | 81 | $99 | -33 | 68 → 35 since 2026-09-20 |
| 2 | Fortune Contrast · BigCommerce | 63 | 68 | Free | -22 | 64 → 42 since 2026-09-12 |
| 3 | Scaffolding Soft Dark · Aigua Devs | 58 | 94 | $320 | -21 | 87 → 66 since 2026-09-15 |
| 4 | Ecity Multistore · Webibazaar | 53 | 85 | $195 | -20 | 58 → 38 since 2026-09-15 |
| 5 | Austin Night · oBundle | 67 | 93 | $295 | -15 | 81 → 66 since 2026-09-20 |
Distribution
How all 232 tested BigCommerce themes fall across Google's bands.
About this report
Scores are Google Lighthouse performance scores from the PageSpeed Insights API, run against each theme's own demo store — the home page and, on store platforms, a collection and a product page — on a simulated mid-range phone and on desktop. A theme's score is the median of its presets; a preset's is the mean of its pages. Every run is kept, and a theme's page shows its history. This month is closed; its numbers no longer change. Read the full methodology, or see the live BigCommerce speed ranking.
Other months: October 2026November 2026
Other reports for September 2026: SEOaccessibility