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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coloradosun.com

https://coloradosun.com· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

coloradosun.com

Sponsored

Hosting Provider

Automattic, Inc

IP Address

192.0.78.153

Server Location

🇺🇸 San Francisco, United States

ASN

AS2635

Server

Nginx

Nameservers

ns60.worldnic.com.ns59.worldnic.com.

Performance

Page Speed

3.2 MB

149 requests

Image Optimization

Lazy LoadWebPResponsiveUploadcareJetpack Photon (WordPress)

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Newspack Scottv2.18.0

by Automattic

View Theme

Progressive Web App

PWA ReadyWeb ManifestService WorkerApple Touch IconTheme Color

Technology Stack

27 Technologies Detected

Plugins

Events Calendar Pro Event Tickets Credibility Indicators Newspack Ads Newspack Blocks Newspack Listings Newspack Manager Newspack Newsletters Newspack Plugin Newspack Popups

Jetpack

Perfmatters Onesignal Free Web Push Notifications Wp Parsely

Libraries

Analytics

CSS Frameworks

Icon Libraries

Fonts

Tag Managers

Advertising

Popups & Forms

Web Servers

Customer Support

SEO Analysis

A82/100

coloradosun.comcoloradosun.com

The Colorado Sun: News, climate, politics, water, housing and more

The Colorado Sun is an award-winning news outlet that covers all of Colorado — from water and climate to politics and business.

Title Length66 chars

Recommended: 50-60 chars

Description Length127 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

4 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

44d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

03.01.2026

Valid Until

03.04.2026

Subject Alternative Names (20)

abobys.family.blogallinonewebsite.code.blogalserdistinto.comarrivenc.comascesa.orgboundbyprovidence.comcashitin-repairs.comcasoncommunications.com+12 more

SHA-256 Fingerprint

2C:6A:12:50:D6:4E:CC:FF:6F:65:23:23:9F:6A:60:E9:03:84:41:57...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🟡 196s(max-age=196, must-revalidate)

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Wed, 18 Feb 2026 07:03:24 GMT

host-header

Newspack

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt1.aspmx.l.google.com

alt2.aspmx.l.google.com

aspmx.l.google.com

aspmx2.googlemail.com

+1 more

Domain Information

coloradosun.com

Domain Age

23y 11m

Created

08.03.2002

Expires

08.03.2028

Last Updated

02.02.2023

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Martel + Helvetica

63/100

Readability

/30

32/40

24px · LH 1.20

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Martel

Serif

Body Font

Helvetica

Sans24px

Contrast Ratio

Reading Comfort

~40 CPL

Needs attention

40px

16px

20px

24px

✅ Excellent readability: 24px body text is ideal for all devices.

✅ 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: 61 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Marketing Automation

ActiveCampaignMid-Market

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

coloradosun.com(5)securepubads.g.doubleclick.net(2)cdn.onesignal.com(2)gstatic.com(1)diffuser-cdn.app-us1.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn Reddit Threads Bluesky

Sponsored

Last analyzed: 18 Feb 2026 at 07:03

Historical Analysis & Change Tracking