viz.ai website review

4 images could be 892 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 1.8 s faster on a phone.

Your mobile performance score is 68. Pages that score under 90 lose visitors before the first paint.

About 141 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 750 ms faster on a phone.

2 files block the first paint until they finish downloading. Deferring or inlining them could save about 800 ms.

The page has 1,520 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

3 third-party services load with your homepage (Intercom, cdn-cookieyes.com and Google Fonts), adding 309 KiB and 294 ms of main-thread time.

3 long tasks block the main thread while loading, the longest for 237 ms. During a long task the page ignores taps.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

1 file is served with short cache lifetimes, so returning visitors download them again (3 KiB).

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

Real visitors wait 2.3 s for your server to start answering (75th percentile). Good is under 800 ms.

Your largest element takes 10.6 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the element shown below.

The page becomes fully interactive after 10.6 s. Good is under 3.8 s.

Real visitors wait 3.2 s for the largest content to appear (75th percentile). Good is under 2.5 s.

Real visitors see the first content after 2.9 s (75th percentile). Good is under 1.8 s.

Visually, the page fills in at 5.3 s (Speed Index). Good is under 3.4 s.

The first text or image appears after 2.1 s on a phone. Good is under 1.8 s.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' tap response (inp) went from 108 ms to 105 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' largest content (lcp) went from 2.3 s to 2.4 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

By the Sustainable Web Design model, a visit to your homepage emits about 0.50 g of CO₂e: 59.9 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

Elements must only use permitted ARIA attributes: 1 element on the page fails this check, rated serious by axe-core.

1 text element doesn't have enough contrast against the background to read easily, especially outdoors on a phone.

Interactive controls must not be nested: 1 element on the page fails this check, rated serious by axe-core.

1 tap target is too small or too close together to hit reliably with a finger.

2 form fields have no label, so screen readers announce an empty box and autofill guesses.

ARIA role should be appropriate for the element: 5 elements on the page fail this check, rated minor by axe-core.

Elements marked as presentational should be consistently ignored: 1 element on the page fails this check, rated minor by axe-core.

Elements with visible text labels do not have matching accessible names. (2 elements).

12 links use generic text like “click here” or “learn more”, which tells Google nothing about the page behind them.

The homepage links to 192 pages on viz.ai and 7 external pages.

There is no https://www.viz.ai/llms.txt, a short Markdown guide to your key pages for AI tools (llmstxt.org). It is optional and few AI tools read it yet, so treat it as a cheap extra.

https://www.viz.ai/post-acute-stroke is marked noindex but linked from your homepage. If it is meant to be found, remove the noindex.

Your homepage links to 2 pages by a URL that isn't their canonical one, for example https://www.viz.ai/neuro/large-vessel-occlusion, whose canonical is https://www.viz.ai/large-vessel-occlusion. Linking straight to the canonical URL saves crawlers a detour and keeps ranking signals on one address.

We fetched 15 pages linked from your homepage (of 61 found) and read each the way a search engine does.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 786 words of visible text.

Opening the homepage sets 5 cookies (measured from a US location before any click).

Loading the homepage contacts 6 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.