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.

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xylem.com

https://xylem.com· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

xylem.com

Sponsored

Hosting Provider

Xylem Inc

IP Address

199.253.101.66

Server Location

🇸🇪 Stockholm, Sweden

ASN

AS60269

Organization

Xylem Inc

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns3.flygt.com.ns4.flygt.com.

Performance

Page Speed

1.5 MB

36 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Xylem Inc

CDN

Cloudflare

Technology Stack

6 Technologies Detected

Libraries

CSS Frameworks

Icon Libraries

Analytics

Tag Managers

CDN

SEO Analysis

B72/100

xylem.comxylem.com

Xylem Water Solutions & Water Technology | Xylem US

Xylem is a leader in developing innovative water solutions through smart technology. Learn more about Xylem's water, wastewater and energy solutions.

Title Length51 chars

Recommended: 50-60 chars

Description Length149 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (5/7)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

robots.txt

127 rules

Sitemap reference found

Sponsored

Security Score

66%Fair

Interactive

HTTPS

WAF

237d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

IdenTrust

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

19.09.2025

Valid Until

14.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

xylem.comuat.xylem.comwww.xylem.comtest.xylem.com

SHA-256 Fingerprint

CA:95:80:D4:49:92:C1:FD:C9:F9:CB:62:03:69:60:30:0B:D6:1E:F4...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🟡 120s(public,max-age=120)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cfc13110ffd80ad-FRA

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mxb-003d2901.gslb.pphosted.com

mxa-003d2901.gslb.pphosted.com

Domain Information

xylem.com

Domain Age

26y 1m

Created

29.12.1999

Expires

05.08.2026

Last Updated

01.08.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

Roboto Flex

71/100

Readability

/30

40/40

16px · LH 1.40

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Roboto Flex

Sans

Body Font

Roboto Flex

Sans16px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

24px

14px

16px

Augmented Fourth

Scale

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.40 ratio ensures comfortable reading.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

11 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)ssl.p.jwpcdn.com(2)googletagmanager.com(2)kit.fontawesome.com(1)cdn.cookielaw.org(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube

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Last analyzed: 18 Feb 2026 at 08:15

Historical Analysis & Change Tracking