adi.com website review

Your mobile performance score is 76. Pages that score under 90 lose visitors before the first paint.

10 files block the first paint until they finish downloading. Deferring or inlining them could save about 650 ms.

7 third-party services load with your homepage (Google CDN, Google Tag Manager and Other Google APIs/SDKs and others), adding 1.1 MB and 440 ms of main-thread time.

About 413 KiB of JavaScript is downloaded but never used on this page.

Google CDN costs a phone 316 ms of main-thread work and 742 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 files are served with short cache lifetimes, so returning visitors download them again (70 KiB).

3 images could be 35 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 150 ms faster on a phone.

5 long tasks block the main thread while loading, the longest for 109 ms. During a long task the page ignores taps.

About 33 KiB of CSS is downloaded but never applied on this page.

Polyfills for old browsers add 21 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.

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 4.2 s for the largest content to appear (75th percentile). Good is under 2.5 s.

Real visitors see the first content after 3.6 s (75th percentile). Good is under 1.8 s.

Real visitors wait 2.7 s for your server to start answering (75th percentile). Good is under 800 ms.

Visually, the page fills in at 16.2 s (Speed Index). Good is under 3.4 s.

The page becomes fully interactive after 10.3 s. Good is under 3.8 s.

Your largest element takes 4.1 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “Digital Engineering and Industrial Digital Transformation S…”. Most of its time is resource load delay (10.0 s).

19 images have no width and height attributes, so the layout jumps as each one loads.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' largest content (lcp) went from 3.9 s to 4.1 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 0.53 g of CO₂e: 64.0 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.

Contentinfo landmark should not be contained in another landmark: 1 element on the page fails this check, rated moderate by axe-core.

Document should not have more than one contentinfo landmark: 1 element on the page fails 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.

1 form field has no label, so screen readers announce an empty box and autofill guesses.

1 visible link has no text or label, so screen readers cannot say where it goes.

ARIA role should be appropriate for the element: 1 element on the page fails this check, rated minor by axe-core.

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

Your title is 73 characters, so Google will cut it off around 60: “Digital Engineering and Industrial Digital Transformation Solutions - ADI”.

No Open Graph image, so links shared on LinkedIn, Slack or Facebook show no preview picture.

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

The homepage links to 41 pages on adi.com and 4 external pages.

There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

There is no /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.

robots.txt blocks GPTBot, ClaudeBot, Google-Extended, Applebot-Extended and CCBot, 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.

/contact, /adi-jetzero, /mxd-opa, /news/adi-named-jetzeros-first-supplier-of-the-year, /news/adi-and-jetzero-announce-key-demonstrator-milestones and /news/adi-awarded-contract-to-develop-integrated-open-process-automation-testbed-with-siemens-at-mxd and 3 others have no meta description, so Google writes the search snippet from whatever text it finds.

/about-adi, /contact, /adi-jetzero and /mxd-opa took over 3 s to send their HTML from our server.

We fetched 15 pages linked from your homepage (of 16 found) and read each the way a search engine does.

3 of 8 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

1 link from your homepage to your own site is broken, for example https://www.adi.com/cdn-cgi/l/email-protection (404).

No Strict-Transport-Security header, so browsers may still try plain http first on a return visit.

No Content-Security-Policy header, the main browser-side defence against injected scripts.

Neither X-Frame-Options nor a CSP frame-ancestors policy is set, so any site can embed yours in a frame.

X-Content-Type-Options: nosniff is missing, so browsers may guess file types.

No Referrer-Policy header, so full URLs can leak to the sites you link to.

No Permissions-Policy header to switch off camera, microphone and location for embedded content.

There is no /.well-known/security.txt telling researchers how to report a security problem to you.

adi.com has no CAA record, so any certificate authority may issue a certificate for it. A CAA record naming your provider (for example letsencrypt.org) closes that door.

adi.com's DNS answers are not signed. DNSSEC stops attackers forging them to send visitors or email elsewhere; most registrars switch it on in a click, though most sites still run without it.

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

Your homepage shows a street address but no LocalBusiness JSON-LD, so Google and AI assistants have to guess your address, hours and phone from the page text.

The homepage shows no opening hours. If customers visit or call, show when.

There is no form on the homepage, so every lead has to click through to another page first.

There is no link to Google or Apple Maps. A directions link is one tap for a phone visitor.

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 526 words of visible text.

Email authentication: SPF record 25 points, plus 15 when it ends in -all (10 for ~all); DMARC record 25, plus 25 for a reject policy (15 for quarantine); a DKIM key on a common selector 10.

Before a visitor clicks anything, the page loads Google Analytics and Google Tag Manager (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

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

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

Loading the homepage contacts 8 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.