Vessel
Vessel is a Shopify theme by Shopify (Free). Tested on 2026-11-07 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 83 for mobile speed and 99 for desktop speed, 92/92 for SEO and 86/86 for accessibility (mobile/desktop, 0–100). On its marketplace it is rated 2.6 out of 5 from 30 reviews.
Mobile73

Desktop98

Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 83 | 99 |
| SEO | 92 | 92 |
| Accessibility | 86 | 86 |
| Best practices | 96 | 96 |
Single preset · measured 30 times since 2026-09-11 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — vessel home page
Mobile
Speed 73 · 27 points to gain
- −20.5 Largest Contentful Paint medium effort
- −4.3 Speed Index medium effort
- −2.5 First Contentful Paint medium effort
- 300 ms Reduce unused CSS high effort
SEO 85 · 15 points to gain
- −7.7 Document does not have a meta description low effort
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 86 · 14 points to gain
- −5.1 Image elements do not have `[alt]` attributes low effort
- −3.6 `[aria-hidden="true"]` elements contain focusable descendents medium effort
- −3.6 Links do not have a discernible name medium effort
- −1.5 Heading elements are not in a sequentially-descending order medium 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
- −0.8 Largest Contentful Paint medium effort
- −0.8 Speed Index medium effort
SEO 85 · 15 points to gain
- −7.7 Document does not have a meta description low effort
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 83 · 17 points to gain
- −4.9 Image elements do not have `[alt]` attributes low effort
- −3.4 `[aria-hidden="true"]` elements contain focusable descendents medium effort
- −3.4 Links do not have a discernible name medium effort
- −3.4 Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). low effort
- −1.5 Heading elements are not in a sequentially-descending order medium 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 | ||||||
| vessel default demo ↗ | 83 | 92 | 86 | 99 | 92 | 86 | 2026-11-07 |
| category ↗ | 88 | 92 | 92 | 100 | 92 | 89 | 2026-11-07 |
| home ↗ | 73 | 85 | 86 | 98 | 85 | 83 | 2026-11-07 |
| product ↗ | 87 | 100 | 80 | 100 | 100 | 85 | 2026-11-07 |