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

prb.org

https://prb.org· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

prb.org

Sponsored

Hosting Provider

Google Cloud Platform

cloud.google.com

IP Address

35.202.173.105

Server Location

🇺🇸 Council Bluffs, United States

ASN

AS396982

Organization

Google Cloud (us-central1)

Server

Nginx

Nameservers

ns-733.awsdns-27.net.ns-1150.awsdns-15.org.ns-124.awsdns-15.com.ns-1962.awsdns-53.co.uk.

Performance

Page Speed

1.4 MB

58 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Google Cloud Platform

Detected API Sources

//maps.googleapis.com/maps/api...

Technology Stack

21 Technologies Detected

Plugins

Easily Generate Rest Api Url Prbdatacenter Search Filter Pro Prb Interactive Table Wp Hide Post Advanced Iframe Wpdatatables

Analytics

Libraries

CSS Frameworks

Advertising

Twitter Ads LinkedIn Ads

Other

Fonts

Tag Managers

Email Marketing

Web Servers

SEO Analysis

C62/100

prb.orgprb.org

PRB

No description available for this page.

Title Length3 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Many images missing alt text (6/8)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

23 URLs

robots.txt

4 rules

Sitemap reference found

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

88d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

15.02.2026

Valid Until

16.05.2026

Subject Alternative Names (2)

prb.orgwww.prb.org

SHA-256 Fingerprint

E1:D4:EE:0B:BE:99:4D:75:79:08:8C:0B:09:40:84:13:1F:00:5D:FE...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Tue, 17 Feb 2026 09:27:54 GMT

link

<https://www.prb.org/wp-json/>; rel="https://api.w.org/", <h...

p3p

CP="ALL DSP NID CURa ADMa DEVa HISa OTPa OUR NOR NAV DEM"

server

nginx/1.21.5

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

prb-org.mail.protection.outlook.com

Domain Information

prb.org

Domain Age

31y 3m

Created

21.11.1994

Expires

20.11.2030

Last Updated

28.09.2025

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Roboto + sans-serif

76/100

Readability

/30

40/40

22px · LH 1.45

Hierarchy

/20

15/25

0.82x ratio

WCAG

/25

11/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Roboto

Sans18px

Body Font

sans-serif

Sans22px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

18px

64px

16px

22px

Octave

Scale

✅ Excellent readability: 22px body text is ideal for all devices.

✅ Optimal line spacing: 1.45 ratio ensures comfortable reading.

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

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

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

⚠️ Cramped layout: 40 elements lack adequate spacing.

GGoogle Fonts

Business & Marketing Stack

7 Tools Detected

Enterprise

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Twitter/X AdsMid-Market

LinkedIn AdsEnterprise

Ad platforms and retargeting pixels

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

prb.org(10)youtube.com(2)connect.facebook.net(2)googletagmanager.com(2)snap.licdn.com(1)

Website Identity

Facebook X (Twitter)LinkedIn YouTube

Sponsored

Last analyzed: 17 Feb 2026 at 09:28

Historical Analysis & Change Tracking