themestestedbyWhirlwind eCommerce logo — Shopify and BigCommerce ecommerce development agencyWhirlwind eCommerce

We are Underground

We are Underground has 8 themes tested on Themestested, for Shopify. Their median Google Lighthouse mobile speed score is 73 (desktop 91), with 0 of 8 scoring 90 or better on mobile. The fastest on mobile is Forge at 83. Last measured 2026-11-08, on each theme's own demo store.

8themes tested
73median mobile speed
91median desktop speed
95median mobile SEO
91median accessibility
ThemePlatformPriceMobile · speed SEO a11yDesktop · speed SEO a11yTested
Forge Shopify $100 839591 999592 2026-11-07
Drop Shopify $180 779085 949087 2026-11-08
Foodie Shopify $150 759190 859190 2026-11-08
Mr Parker Shopify $120 749688 919685 2026-11-08
Fashionopolism Shopify $200 729592 959588 2026-11-08
Testament Shopify $250 699792 919795 2026-11-08
Icon Shopify $250 619082 769079 2026-11-08
Vantage Shopify $150 579794 799786 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.

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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.

Forge: mobile speed 83 on Themestested
<a href="https://themestested.com/theme/shopify/forge"><img src="https://themestested.com/badge/shopify/forge.svg" alt="Forge 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.