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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fanniemae.com

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

Export

fanniemae.com

Sponsored

Hosting Provider

Fannie Mae

IP Address

198.204.187.5

Server Location

🇺🇸 New York, United States

ASN

AS11313

Organization

Fannie Mae

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

pdns111.ultradns.com.pdns111.ultradns.net.pdns111.ultradns.org.ns1.fanniemae.com.+2 more

Performance

Page Speed

3.3 MB

43 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Fannie Mae

CDN

Cloudflare

Technology Stack

8 Technologies Detected

Libraries

CSS Frameworks

Icon Libraries

Analytics

Tag Managers

Other

CDN

Customer Support

SEO Analysis

B78/100

fanniemae.comfanniemae.com

Powering America’s Housing | Fannie Mae

No description available for this page.

Title Length39 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

4 URLs

robots.txt

58 rules

Sitemap reference found

Sponsored

Security Score

61%Fair

Interactive

HTTPS

WAF

64d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

22.04.2025

Valid Until

22.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

www.fanniemae.comacpt-api.knowyouroptions.comacpt-capitalmarkets.fanniemae.comacpt-corp.fanniemae.comacpt-fm.fanniemae.comacpt-historicalcreditscores.fanniemae.comacpt-jobs.fanniemae.comacpt-multifamily.fanniemae.com+12 more

SHA-256 Fingerprint

BF:DC:62:A5:57:C9:01:24:41:DB:82:7D:91:F9:86:C9:2F:C3:CE:66...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age

cache-control

🟢 1 Month(public, max-age=2592000)

cf-cache-status

REVALIDATED

cf-ray🇩🇪 Frankfurt

9cf147f2bc9b2bd5-FRA

content-encoding

📦 Gzip(gzip)

content-language

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mx2.hc3413-83.iphmx.com

mx1.hc3413-83.iphmx.com

Domain Information

fanniemae.com

Domain Age

30y 10m

Created

28.04.1995

Expires

29.04.2026

Last Updated

25.04.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

Source Sans Pro + sans-serif

88/100

Readability

/30

40/40

18px · LH 1.60

Hierarchy

/20

25/25

2.44x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Source Sans Pro

Sans44px

Body Font

sans-serif

Sans18px

Contrast Ratio

Reading Comfort

~46 CPL

Optimal (45–75)

44px

20px

26px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.4x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

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

✅ Optimal line length: ~46 characters per line is comfortable to read.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

A/B Testing & Optimization

VWO (Visual Website Optimizer)Mid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)googletagmanager.com(2)static.cloud.coveo.com(2)browser-update.org(2)cdn.cookielaw.org(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn

Sponsored

Last analyzed: 17 Feb 2026 at 00:48

Historical Analysis & Change Tracking