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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qgis.org

https://qgis.org· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

qgis.org

Sponsored

Hosting Provider

Hetzner

hetzner.com

IP Address

95.217.26.231

Server Location

🇫🇮 Helsinki, Finland

ASN

AS24940

Organization

Hetzner Online GmbH

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

anuj.ns.cloudflare.com.jessica.ns.cloudflare.com.

Performance

Page Speed

2.3 MB

34 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Hetzner

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

5 Technologies Detected

CSS Frameworks

Icon Libraries

Analytics

Web Servers

SEO Analysis

B70/100

qgis.orgqgis.org

Spatial without Compromise · QGIS Web Site

Title Length42 chars

Recommended: 50-60 chars

Description Length43 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

172 URLs

robots.txt

57 rules

Sitemap reference found

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

55d

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

Valid From

13.01.2026

Valid Until

13.04.2026

Subject Alternative Names (1)

qgis.org

SHA-256 Fingerprint

9F:39:4A:D1:C1:C3:1D:7D:36:D9:67:BF:7A:95:D3:3F:65:47:FB:1C...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

content-length

30979

content-type

text/html

date

Mon, 16 Feb 2026 19:25:14 GMT

etag

"69936945-7903"

last-modified

Mon, 16 Feb 2026 19:00:21 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

alt2.aspmx.l.google.com

aspmx3.googlemail.com

alt1.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

qgis.org

Domain Age

23y 6m

Created

01.08.2002

Expires

01.08.2026

Last Updated

15.09.2025

Registrar

Vautron Rechenzentrum AG

DNSSEC

Not Enabled

Typography & Readability

twemoji country flags

58/100

Readability

/30

32/40

24px · LH 1.25

Hierarchy

/20

25/25

2.87x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

twemoji country flags

Sans69px

Body Font

twemoji country flags

Sans24px

Contrast Ratio

Reading Comfort

~32 CPL

Needs attention

69px

48px

24px

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

✅ Strong hierarchy: Headlines are 2.9x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

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

⚠️ Risky: Text appears on background images without overlay protection.

⚠️ Cramped layout: 35 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(3)matomo.qgis.org(1)qgis.github.io(1)

Website Identity

Facebook GitHub

Sponsored

Last analyzed: 16 Feb 2026 at 19:27

Historical Analysis & Change Tracking