Zenith
Zenith is a Astro theme by Cosmic Themes (Paid). Tested on 2026-09-12 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 91 for mobile speed and 100 for desktop speed, 100/100 for SEO and 97/97 for accessibility (mobile/desktop, 0–100).
Mobile91
Desktop100
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 91 | 100 |
| SEO | 100 | 100 |
| Accessibility | 97 | 97 |
| Best practices | 96 | 100 |
Single preset · measured 2 times since 2026-09-12 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Zenith home page
Mobile
Speed 91 · 9 points to gain
- −4.3 First Contentful Paint medium effort
- −4.3 Largest Contentful Paint medium effort
- −0.7 Speed Index medium effort
Accessibility 97 · 3 points to gain
- −3.3 Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). low effort
Best practices 96 · 4 points to gain
- −3.8 Serves images with low resolution low effort
Desktop
Accessibility 97 · 3 points to gain
- −3.3 Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). low effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Zenith default demo ↗ | 91 | 100 | 97 | 100 | 100 | 97 | 2026-09-12 |
| home ↗ | 91 | 100 | 97 | 100 | 100 | 97 | 2026-09-12 |
Show this score on your site
A live badge: it always shows Zenith's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/astro/zenith"><img src="https://themestested.com/badge/astro/zenith.svg" alt="Zenith speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.