Cosimo
Cosimo is a WordPress theme by CrestaProject (Free). Tested on 2026-09-13 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 83 for mobile speed and 91 for desktop speed, 40/40 for SEO and 85/85 for accessibility (mobile/desktop, 0–100). On its marketplace it is rated 4.5 out of 5 from 2 reviews.
Mobile83
Desktop91
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 83 | 91 |
| SEO | 40 | 40 |
| Accessibility | 85 | 85 |
| Best practices | 100 | 100 |
Single preset · measured 2 times since 2026-09-13 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Cosimo home page
Mobile
Speed 83 · 17 points to gain
- −12.8 Largest Contentful Paint medium effort
- −3.6 First Contentful Paint medium effort
SEO 40 · 60 points to gain
- −40.3 Page is blocked from indexing low effort
- −10 Document does not have a meta description low effort
- −10 Links do not have descriptive text low effort
Accessibility 85 · 15 points to gain
- −5 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −5 Links rely on color to be distinguishable. medium effort
- −5 Touch targets do not have sufficient size or spacing. medium effort
Desktop
Speed 91 · 9 points to gain
- −7.3 Cumulative Layout Shift medium effort
- −0.8 Largest Contentful Paint medium effort
SEO 40 · 60 points to gain
- −40.3 Page is blocked from indexing low effort
- −10 Document does not have a meta description low effort
- −10 Links do not have descriptive text low effort
Accessibility 85 · 15 points to gain
- −4.9 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −4.9 Links rely on color to be distinguishable. medium effort
- −4.9 Touch targets do not have sufficient size or spacing. medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Cosimo default demo ↗ | 83 | 40 | 85 | 91 | 40 | 85 | 2026-09-13 |
| home ↗ | 83 | 40 | 85 | 91 | 40 | 85 | 2026-09-13 |
Show this score on your site
A live badge: it always shows Cosimo's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/wordpress/cosimo"><img src="https://themestested.com/badge/wordpress/cosimo.svg" alt="Cosimo speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.