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

qt.io

https://qt.io· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

qt.io

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

52.18.144.254

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS EC2 (eu-west-1)

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-49-c.gandi.net.ns-175-a.gandi.net.ns-243-b.gandi.net.

Performance

Page Speed

487 KB

82 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

HubSpot CMS

Technology Stack

9 Technologies Detected

Libraries

UI Components

CSS Frameworks

Icon Libraries

Fonts

Analytics

Tag Managers

Marketing

CDN

SEO Analysis

A88/100

qt.ioqt.io

Qt | Tools for Each Stage of Software Development Lifecycle

All the essential Qt tools for all stages of Software Development Lifecycle: planning, design, development, testing, and deployment.

Title Length59 chars

Recommended: 50-60 chars

Description Length132 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

8 rules

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

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+H3

Valid From

10.01.2026

Valid Until

10.04.2026

Subject Alternative Names (2)

b984bb61.sni.cloudflaressl.comwww.qt.io

SHA-256 Fingerprint

03:BC:CD:AE:B3:FC:CA:7F:AA:6A:7E:1C:3F:F3:33:7A:AC:47:D4:C8...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-credentials

false

alt-svc

h3=":443"; ma=86400

cache-control

🟡 0s(s-maxage=5,max-age=0)

cache-tag

CT-122643635328,CT-289802953915,CT-295738742994,CT-302842514...

cf-cache-status

MISS

cf-ray🇩🇪 Frankfurt

9cd8253c2ca6dcae-FRA

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

qt-io.mail.protection.outlook.com

Domain Information

qt.io

Domain Age

12y 4m

Created

05.10.2013

Expires

05.10.2026

Last Updated

24.08.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

Titillium Web + sans-serif

71/100

Readability

/30

40/40

16px · LH 1.44

Hierarchy

/20

18/25

4.25x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Titillium Web

Sans68px

Body Font

sans-serif

Sans16px

Contrast Ratio

Reading Comfort

~152 CPL

Needs attention

68px

44px

32px

20px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.44 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.2x 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.

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

GGoogle Fonts

Business & Marketing Stack

5 Tools Detected

Enterprise

CRM Systems

HubSpotMid-Market

Customer Relationship Management platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

qt.io(7)scripts.simpleanalyticscdn.com(2)local(2)js-eu1.hs-banner.com(1)js-eu1.hubspot.com(1)

Website Identity

Facebook X (Twitter)LinkedIn YouTube

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Last analyzed: 13 Feb 2026 at 23:36

Historical Analysis & Change Tracking