Startui
Startui is a Webflow theme by Templates ($99). Tested on 2026-10-05 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 67 for mobile speed and 90 for desktop speed, 91/91 for SEO and 86/86 for accessibility (mobile/desktop, 0–100).
Mobile67
Desktop90
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 67 | 90 |
| SEO | 91 | 91 |
| Accessibility | 86 | 86 |
| Best practices | 100 | 100 |
Single preset · measured 2 times since 2026-10-05 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Startui home page
Mobile
Speed 67 · 33 points to gain
- −21.5 Largest Contentful Paint medium effort
- −6.2 First Contentful Paint medium effort
- −4.3 Cumulative Layout Shift medium effort
- −1.2 Speed Index medium effort
- 150 ms Reduce unused CSS high effort
SEO 91 · 9 points to gain
- −9.1 Links do not have descriptive text low effort
Accessibility 86 · 14 points to gain
- −4.7 Input buttons do not have discernible text. medium effort
- −3.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.3 Links do not have a discernible name medium effort
- −1.4 Heading elements are not in a sequentially-descending order medium effort
- −1.4 Document does not have a main landmark. medium effort
Desktop
Speed 90 · 10 points to gain
- −6.5 Cumulative Layout Shift medium effort
- −2.7 Largest Contentful Paint medium effort
- −1 First Contentful Paint medium effort
SEO 91 · 9 points to gain
- −9.1 Links do not have descriptive text low effort
Accessibility 86 · 14 points to gain
- −4.7 Input buttons do not have discernible text. medium effort
- −3.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.3 Links do not have a discernible name medium effort
- −1.4 Heading elements are not in a sequentially-descending order medium effort
- −1.4 Document does not have a main landmark. medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Startui default demo ↗ | 67 | 91 | 86 | 90 | 91 | 86 | 2026-10-05 |
| home ↗ | 67 | 91 | 86 | 90 | 91 | 86 | 2026-10-05 |
Show this score on your site
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<a href="https://themestested.com/theme/webflow/startui-startup-website-template"><img src="https://themestested.com/badge/webflow/startui-startup-website-template.svg" alt="Startui speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.