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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darpa.mil

https://darpa.mil· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

darpa.mil

Mobile

Sponsored

Hosting Provider

United States Department of Defense

IP Address

192.5.18.235

Server Location

🇺🇸 Arlington, United States

ASN

AS22238

Organization

United States Department of Defense

Server

CloudFront

CDN

CloudFront

Nameservers

ns3.darpa.mil.ns2.darpa.mil.ns1.darpa.mil.

Performance

Page Speed

7.4 MB

108 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

React

Styling

Tailwind CSS

CMS

Drupal

Infrastructure

Hosting

United States Department of Defense

CDN

CloudFront

Technology Stack

9 Technologies Detected

Analytics

Frameworks

Libraries

CSS Frameworks

Tag Managers

CDN

SEO Analysis

D52/100

darpa.mildarpa.mil

Home | DARPA

Since 1958, DARPA has held to an enduring mission: To create technological surprise for U.S. national security.

Title Length12 chars

Recommended: 50-60 chars

Description Length111 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

53 rules

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

No WAF

220d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

04.09.2025

Valid Until

22.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.darpa.mildarpa.mil

SHA-256 Fingerprint

1C:2C:FA:D8:1A:A3:C5:5A:A2:CE:87:A0:E1:5C:B4:84:68:0B:68:66...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

content-length

87512

content-security-policy

default-src 'none'; script-src 'self' https://www.youtube.co...

content-type

text/html

date

Sat, 14 Feb 2026 00:43:43 GMT

etag

"0f805710936cdaff12ae92f52d873630"

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

mailgate4.darpa.mil

mailgate3.darpa.mil

mailgate6.darpa.mil

mailgate5.darpa.mil

+1 more

Domain Information

darpa.mil

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Inter + Source Sans Pro Web

31/100

Readability

/30

5/40

13px · LH 1.10

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Inter

Sans

Body Font

Source Sans Pro Web

Sans13px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

68px

20px

24px

13px

❌ Critical: 13px body text is too small. Increase to at least 14px.

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

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

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

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 69 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(13)googletagmanager.com(4)gstatic.com(1)clarity.ms(1)google.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn

Sponsored

Last analyzed: 14 Feb 2026 at 00:44

Historical Analysis & Change Tracking