What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

nutanix.com

https://nutanix.com· First analyzed 22 Apr 2026· Updated 22 Apr 2026

Export

nutanix.com

Mobile

Sponsored

Hosting Provider

Nutanix

IP Address

192.146.155.35

Site Location

🇺🇸 San Jose, United Statesvia schema_nap

Server Location

🇺🇸 Santa Clara, United States

ASN

AS53736

Organization

Nutanix

CDN

Fastly

Nameservers

ns-742.awsdns-28.net.ns-109.awsdns-13.com.ns-1511.awsdns-60.org.ns-1902.awsdns-45.co.uk.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

511 ms10%

Speed Index

664 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

194 KB

55 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Adobe Experience Manager

Technology Stack

1 Technologies Detected

CSS Frameworks

Tailwind CSS

SEO Analysis

A84/100

Meta Tags15/15

Content11/12

Headings8/8

Technical23/25

E-E-A-T2/7

Images3/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

nutanix.comnutanix.com

One Platform to Run Apps, Data, and AI Anywhere | Nutanix

We offer a unified platform that seamlessly integrates infrastructure and management to enable smooth operations of data and apps across clouds.

Title Length57 chars

Recommended: 50-60 chars (~348px / 580px)

Description Length144 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (22/23) — critical for accessibility and SEO

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

17 URLs

17 sub-sitemaps

robots.txt

50 rules

Sitemap reference found

Local SEO

Local Search Readiness

33/100

Needs Work

9 12

Sponsored

AI & LLM Readiness

D46/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

2/25

Citation

14/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:3%

Words:922

Token eff.:Optimal

Depth:1/5

Structured Data

1 JSON-LD

Organization×1.1

Citation Readiness

Opening Summary34w

Descriptive Headingsavg 4.4w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

83/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

20/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

10/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

9/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

69/100

A+

24 mg

CO₂e / view

194.0 KB

Page Weight

95%

Cleaner Than

New Visitor

27 mg

Returning (cached)

14 mg

Annual (10K/mo)

2.9 kg

Emission Segments

Data Center

5 mg

Network

6 mg

Device

13 mg

Resource Breakdown

JavaScript

155.3 KB

Images

8.5 KB

CSS

6.4 KB

HTML

23.9 KB

Green Hosting Not Verified

Nutanix

3 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

76%Good

Interactive

HTTPS

No WAF

224d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

01.12.2025

Valid Until

02.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.nutanix.comnutanix.com

SHA-256 Fingerprint

25:C2:FB:68:AF:E7:44:C8:AF:1B:D2:62:47:01:AF:97:2E:08:65:49...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-headers

Content-Type, Authorization, Origin, Accept, X-Requested-Wit...

access-control-allow-methods

OPTIONS, HEAD, GET, POST, PUT, DELETE

akamai-edgescape

Continent:EU; Timezone:GMT+2; Country:FI; State:; City:HELSI...

cache-control

🟡 85s(public, must-revalidate, max-age=85)

content-disposition

inline

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mxa-002c1b01.gslb.pphosted.com

mxb-002c1b01.gslb.pphosted.com

Domain Information

nutanix.com

Domain Age

16y 7m

Created

20.09.2009

Expires

20.09.2026

Last Updated

16.09.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

75/100

Mobile Friendly30 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Montserrat

WCAG Partial

75/100

Readability

/30

23/30

20px · LH 1.60

Hierarchy

/20

20/20

2.5x ratio · ✓ H1→H6

WCAG

/25

17/25

1:1 min contrast

Performance

/25

15/25

1 font · 2 req

Heading Font

Montserrat

Sans50px

Body Font

Montserrat

Sans20px

Contrast Ratio

1:1

3 issues

Reading Comfort

~34 CPL

Narrow lines

50px

32px

21px

20px

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 20/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

Buy on MyFontsFlesch 20

Color Palette

10 unique colors

21:1 AAA Dark

#000000

Text· 44.300000000000004%

#ffffff

Background· 20.900000000000002%

#0e2573

Primary· 5.8%

#4837b6

Accent· 5.7%

#816adc

Accent· 4.9%

#4270c5

Accent· 4.4%

#989ddf

Accent· 4%

#00031b

Accent· 3.9%

Business & Marketing Stack

3 Tools Detected

Enterprise

Marketing Automation

MarketoEnterprise

Email marketing and automation platforms

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

assets.adobedtm.com(10)j.6sc.co(2)local(2)cdn.cookielaw.org(1)static-p136464-e1403605.adobeaemcloud.com(1)

Website Identity

Nutanix

Organization

408-216-8360

www.nutanix.com

16 years old

1740 Technology Drive, San Jose

95110, San Jose, California

Location detected: 🇺🇸 United States, San Josevia schema_nap

CSC Corporate Domains, Inc.en-US

Social Profiles

Facebook X (Twitter)LinkedIn

Sponsored

Last analyzed: 22 Apr 2026 at 16:24

Historical Analysis & Change Tracking