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

nagios.org

https://nagios.org· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

nagios.org

Sponsored

Hosting Provider

Linode (Akamai)

linode.com

IP Address

45.79.21.111

Server Location

🇺🇸 Richardson, United States

ASN

AS63949

Organization

Linode

Server

Apache

CDN

Cloudflare

WAF

Cloudflare

Nameservers

greg.ns.cloudflare.com.pearl.ns.cloudflare.com.

Performance

Page Speed

373 KB

96 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.1

cms

Hello Elementorv3.4.6

by Elementor Team

View Theme

Technology Stack

26 Technologies Detected

Plugins

Wp Stats Manager Pardot Safe Svg Utm Event Tracker And Analytics Wpforo

Elementor

Burst Statistics Independent Analytics Pro Wp Statistics

Analytics

Google Analytics

Google Analytics 4

Fathom Analytics Mouseflow

Advertising

Google Ads LinkedIn Ads Microsoft Advertising

Libraries

Other

CSS Frameworks

Icon Libraries

Tag Managers

Customer Support

Web Servers

Languages

SEO Analysis

A82/100

nagios.orgnagios.org

Nagios | Open Source Network Monitoring Solution

Free open source IT monitoring tool with Nagios Core. 25+ years of monitoring servers, networks, applications, and infrastructure. Trusted by 1m+ users world...

Description truncated.

Title Length48 chars

Recommended: 50-60 chars

Description Length162 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

3 URLs

robots.txt

5 rules

Sitemap reference found

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

234d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.09.2025

Valid Until

11.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.nagios.orgnagios.org

SHA-256 Fingerprint

04:48:B0:4F:A1:B4:DC:89:8C:B8:B2:BD:5B:BA:6C:1F:03:7F:C4:62...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟢 1 Month(max-age=2592000)

content-encoding

📦 Gzip(gzip)

content-length

35064

content-type

text/html; charset=UTF-8

date

Thu, 19 Feb 2026 13:59:11 GMT

expires

Sat, 21 Mar 2026 13:59:11 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

nagios-org.mail.protection.outlook.com

Domain Information

nagios.org

Domain Age

24y 9m

Created

03.05.2001

Expires

03.05.2032

Last Updated

20.06.2025

Registrar

eNom, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

Roboto + Geist

95/100

Readability

/30

40/40

18px · LH 1.70

Hierarchy

/20

25/25

2.22x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Roboto

Sans40px

Body Font

Geist

Sans18px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

40px

20px

18px

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

✅ Optimal line spacing: 1.70 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.2x 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.

✅ Protected text on images: Using gradient for readability.

Business & Marketing Stack

9 Tools Detected

Enterprise

CRM Systems

SalesforceEnterprise

Customer Relationship Management platforms

Behavior Analytics

MouseflowSMB

FathomSMB

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

LinkedIn AdsEnterprise

Microsoft AdsEnterprise

Google AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

CookieYesSMB

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

nagios.org(4)go.nagios.org(3)cdn-cookieyes.com(3)googletagmanager.com(3)bat.bing.com(2)

Website Identity

Facebook X (Twitter)LinkedIn GitHub

Sponsored

Last analyzed: 19 Feb 2026 at 14:20

Historical Analysis & Change Tracking