norstella.com website review

45 files block the first paint until they finish downloading. Deferring or inlining them could save about 3.4 s.

7 files are served with short cache lifetimes, so returning visitors download them again (292 KiB).

About 497 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 1.0 s faster on a phone.

8 third-party services load with your homepage (Google Tag Manager, Hubspot and Optanon and others), adding 1.0 MB and 976 ms of main-thread time.

Your mobile performance score is 56. Pages that score under 90 lose visitors before the first paint.

Google Tag Manager costs a phone 531 ms of main-thread work and 503 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

12 long tasks block the main thread while loading, the longest for 340 ms. During a long task the page ignores taps.

A phone's processor spends 3.0 s on main-thread work while loading, 1.5 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

Hubspot costs a phone 253 ms of main-thread work and 202 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

The page has 1,514 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

About 32 KiB of CSS is downloaded but never applied on this page.

Polyfills for old browsers add 9 KiB JavaScript that modern phones do not need.

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

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

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.

The page becomes fully interactive after 12.0 s. Good is under 3.8 s.

Your largest element takes 5.4 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “AI That Grows With You Powered by the industry’s most trust…”.

The first text or image appears after 3.7 s on a phone. Good is under 1.8 s.

Real visitors wait 3.3 s for the largest content to appear (75th percentile). Good is under 2.5 s.

For real visitors the layout shifts by 0.15 (75th percentile). Good is under 0.1.

Real visitors see the first content after 2.6 s (75th percentile). Good is under 1.8 s.

Real visitors wait 1.2 s for your server to start answering (75th percentile). Good is under 800 ms.

Scripts block taps and scrolling for 559 ms in total while the page loads. Good is under 200 ms.

Visually, the page fills in at 4.8 s (Speed Index). Good is under 3.4 s.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' tap response (inp) went from 98 ms to 103 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 3.2 s to 3.2 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

1 image (34 KiB) is JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

By the Sustainable Web Design model, a visit to your homepage emits about 0.55 g of CO₂e: 66.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

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

All page content should be contained by landmarks: 34 elements on the page fail this check, rated moderate by axe-core.

Landmarks should have a unique role or role/label/title (i.e. accessible name) combination: 1 element on the page fails this check, rated moderate by axe-core.

2 visible links have no text or label, so screen readers cannot say where they go.

Headings skip levels (h2 → h4 and h2 → h4), which makes the page harder to scan with a screen reader.

Your title is 66 characters, so Google will cut it off around 60: “Norstella | From pipeline to patient — intelligently powered by AI”.

Your meta description is 188 characters; Google truncates after about 160, so the end of your pitch is cut.

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

The homepage links to 139 pages on norstella.com and 29 external pages.

Your Organization JSON-LD is missing sameAs (social profiles), description and contact details. These are the facts AI assistants use to describe a business and to tell it apart from others with a similar name.

robots.txt blocks Applebot-Extended, which collect pages to train models. That's a legitimate choice and doesn't by itself stop the site appearing in AI answers, which the crawlers above handle.

https://www.norstella.com/news-events took over 3 s to send its HTML from our server.

We fetched 15 pages linked from your homepage (of 36 found) and read each the way a search engine does.

1 error was logged to the browser console while the page loaded, for example “Failed to load resource: net::ERR_FAILED”.

No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust you.

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 925 words of visible text.

Before a visitor clicks anything, the page loads Google Ads, Google Analytics and Google Tag Manager (measured from a US location before any click). A consent tool (OneTrust) is installed; check it blocks these until visitors agree where the law requires it.

Opening the homepage sets 2 cookies (measured from a US location before any click).

Loading the homepage contacts 20 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.