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

fluke.com

https://fluke.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

fluke.com

Sponsored

Hosting Provider

Pantheon

cloudflare.com

IP Address

172.64.147.143

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Nginx

CDN

Fastly

Nameservers

ns-1656.awsdns-15.co.uk.ns-523.awsdns-01.net.ns-1049.awsdns-03.org.ns-131.awsdns-16.com.

Performance

Page Speed

576 KB

37 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

12 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Advertising

Google Ads Microsoft Advertising

Libraries

CSS Frameworks

Icon Libraries

Fonts

Tag Managers

Other

Other

Web Servers

SEO Analysis

D52/100

fluke.comfluke.com

Fluke Corporation: Fluke Electronics, Calibration and Networks

Fluke Corporation is the world leader in the manufacture, distribution and service of industrial engineering electronic test tools, thermal imaging, calibrat...

Description truncated.

Title Length62 chars

Recommended: 50-60 chars

Description Length186 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (1/1)

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

330 URLs

robots.txt

119 rules

Sitemap reference found

Sponsored

A+

Security Score

91%Excellent

Static / Informational

HTTPS

No WAF

263d

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

07.10.2025

Valid Until

07.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

*.fluke.comfluke.comoci.fluke.comflkh.oci.fluke.comflkp.oci.fluke.comsoacs-dev.oci.fluke.comadf-prod.oci.fluke.comgit.oci.fluke.com+12 more

SHA-256 Fingerprint

64:53:60:AF:B2:28:31:E1:85:7C:E7:F5:49:D1:96:46:FE:4E:D0:D1...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

314455

cache-control

🔵 1 Days(max-age=86400, must-revalidate, public, s-maxage=2549000)

content-encoding

📦 Gzip(gzip)

content-language

en-us

content-length

29908

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mxb-001d2f02.gslb.pphosted.com

mxa-001d2f02.gslb.pphosted.com

Domain Information

fluke.com

Domain Age

39y 4m

Created

27.10.1986

Expires

26.10.2027

Last Updated

01.11.2025

Registrar

SafeNames Ltd.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

Noto Sans

63/100

Readability

/30

25/40

36px · LH 1.10

Hierarchy

/20

15/25

1.28x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Noto Sans

Sans46px

Body Font

Noto Sans

Sans36px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

46px

24px

18px

36px

✅ Excellent readability: 36px body text is ideal for all devices.

⚠️ Tight line spacing (1.10). Consider 1.4-1.6 for better readability.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ 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.

Buy on MyFonts

Business & Marketing Stack

5 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

A/B Testing & Optimization

OptimizelyEnterprise

Experimentation and conversion optimization

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)googletagmanager.com(4)bat.bing.com(2)cdn.optimizely.com(2)cdn.cookielaw.org(1)

Website Identity

fluke.com

39 years old

SafeNames Ltd.

Sponsored

Last analyzed: 17 Feb 2026 at 06:03

Historical Analysis & Change Tracking