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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lumenlearning.com

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

Export

lumenlearning.com

Mobile

Sponsored

Hosting Provider

Fastly, Inc.

IP Address

151.101.130.159

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

Server

Flywheel/5.1.0

CDN

Fastly

Nameservers

ns-1376.awsdns-44.org.ns-1751.awsdns-26.co.uk.ns-827.awsdns-39.net.ns-103.awsdns-12.com.

Performance

Page Speed

869 KB

121 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9

cms

Avadav7.3.1

by ThemeFusion

View Theme

Technology Stack

29 Technologies Detected

Plugins

Codecanyon 5299073 Bugmebar A Simple Little Notification Plugin Revslider Testimonial Builder Fusion Core Ajax Search Pro Fusion Builder

CSS Frameworks

Meta Frameworks

UI Components

Owl Carousel Lightbox

Other

Analytics

Libraries

Other

Icon Libraries

Fonts

Tag Managers

Marketing

Advertising

Platforms

Customer Support

SEO Analysis

A+100/100

lumenlearning.comlumenlearning.com

Lumen Learning | Online Materials & Resources for Higher Ed

Lumen Learning offers affordable digital courseware & professional development resources to enhance effective teaching and increase student success.

Title Length59 chars

Recommended: 50-60 chars

Description Length148 chars

Recommended: 120-160 chars

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

32d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

21.12.2025

Valid Until

21.03.2026

Subject Alternative Names (2)

lumenlearning.comwww.lumenlearning.com

SHA-256 Fingerprint

25:8E:34:BA:BC:D1:A5:17:CB:FA:50:7F:75:50:83:A0:0D:92:8E:51...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

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HTTP Headers

Developer Console

accept-ranges

bytes

content-encoding

📦 Gzip(gzip)

content-length

186976

content-type

text/html; charset=UTF-8

date

Tue, 17 Feb 2026 00:31:23 GMT

fastly-restarts

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt1.aspmx.l.google.com

aspmx.l.google.com

aspmx3.googlemail.com

aspmx2.googlemail.com

+1 more

Domain Information

lumenlearning.com

Domain Age

13y 8m

Created

22.06.2012

Expires

22.06.2027

Last Updated

09.06.2025

Registrar

Amazon Registrar, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

PP Writer Book + Helvetica Neue

33/100

Readability

/30

20/40

12px · LH 1.50

Hierarchy

/20

18/25

4.83x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

PP Writer Book

Sans58px

Body Font

Helvetica Neue

Sans12px

Contrast Ratio

Reading Comfort

~400 CPL

Needs attention

58px

46px

30px

21px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.8x larger than body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

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

⚠️ Risky: Text appears on background images without overlay protection.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

5 Tools Detected

Enterprise

CRM Systems

HubSpotMid-Market

Customer Relationship Management platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

LinkedIn AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

lumenlearning.com(11)googletagmanager.com(2)js.hs-banner.com(1)js.hsadspixel.net(1)js.hubspot.com(1)

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Last analyzed: 17 Feb 2026 at 00:31

Historical Analysis & Change Tracking