Horizon
Horizon is a Shopify theme by Shopify (Free). Tested on 2026-11-08 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 71 for mobile speed and 98 for desktop speed, 95/95 for SEO and 93/98 for accessibility (mobile/desktop, 0–100). On its marketplace it is rated 2.9 out of 5 from 206 reviews.
Mobile71
Desktop98
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 71 | 98 |
| SEO | 95 | 95 |
| Accessibility | 93 | 98 |
| Best practices | 96 | 96 |
Single preset · measured 52 times since 2026-10-02 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — horizon home page
Mobile
Speed 71 · 29 points to gain
- −24.8 Largest Contentful Paint medium effort
- −3.3 Speed Index medium effort
- −1.3 First Contentful Paint medium effort
- 300 ms Reduce unused CSS high effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Desktop
Speed 98 · 2 points to gain
- −2.2 Largest Contentful Paint medium effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| horizon default demo ↗ | 71 | 95 | 93 | 98 | 95 | 98 | 2026-11-04 |
| category ↗ | 77 | 92 | 98 | 99 | 92 | 99 | 2026-11-04 |
| home ↗ | 71 | 92 | 100 | 98 | 92 | 100 | 2026-11-07 |
| product ↗ | 66 | 100 | 82 | 98 | 100 | 95 | 2026-11-08 |
Show this score on your site
A live badge: it always shows Horizon's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/shopify/horizon"><img src="https://themestested.com/badge/shopify/horizon.svg" alt="Horizon speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.