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

open.edu

https://open.edu· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

open.edu

Mobile

Sponsored

Hosting Provider

Open University

IP Address

137.108.200.104

Server Location

🇬🇧 Dalkeith, United Kingdom

ASN

AS786

Organization

Open University

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

dns1.easydns.com.dns3.easydns.org.dns2.easydns.net.nse-0.open.ac.uk.+2 more

Performance

Page Speed

3.6 MB

64 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Technology Stack

5 Technologies Detected

Libraries

Other

CSS Frameworks

Tag Managers

CDN

SEO Analysis

F35/100

open.eduopen.edu

Online Learning Courses and Adult Education - The Open University

The Open University offers flexible full-time and part-time study, supported distance and open learning for undergraduate and postgraduate courses and qualif...

Description truncated.

Title Length65 chars

Recommended: 50-60 chars

Description Length166 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (13/16)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

39 rules

Sponsored

Security Score

66%Fair

Interactive

HTTPS

WAF

89d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

13.02.2026

Valid Until

14.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.open.ac.uk

SHA-256 Fingerprint

1E:4B:B8:82:C8:27:48:33:47:C4:53:6E:45:2D:03:89:83:0D:10:0A...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cdd5916fde3f7ae-FRA

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Sat, 14 Feb 2026 14:45:13 GMT

expect-ct

max-age=86400, enforce

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

open-edu.mail.protection.outlook.com

Domain Information

open.edu

DNSSEC

Not Enabled

Typography & Readability

Poppins

64/100

Readability

/30

30/40

16px · LH --

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Poppins

Body Font

Poppins

Sans16px

Contrast Ratio

Reading Comfort

Single Family

left aligned

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

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

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)open.ac.uk(5)ouhome-assets(2)sgtm.open.ac.uk(1)de.cdn-v3.conductrics.com(1)

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Last analyzed: 14 Feb 2026 at 14:45

Historical Analysis & Change Tracking