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

1and1.com

https://1and1.com· First analyzed 23 Apr 2026· Updated 23 Apr 2026

Export

1and1.com

Mobile

Sponsored

Hosting Provider

IONOS (1&1)

ionos.com

IP Address

74.208.4.76

Site Location

🇺🇸 Philadelphia, United Statesvia schema_nap

Server Location

🇺🇸 Kansas City, United States

ASN

AS8560

Organization

IONOS Inc

Server

Apache

Nameservers

ns-1and1.ui-dns.org.ns-1and1.ui-dns.com.ns-1and1.ui-dns.biz.ns-1and1.ui-dns.de.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

460 ms10%

Speed Index

598 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

998 KB

191 requests

Image Optimization

Lazy LoadAVIF

0–49

50–89

90–100

Architecture Stack

Hybrid

⚡ SSG

Frontend

Framework

Next.js

Styling

Tailwind CSS

CMS

PrestaShop

Infrastructure

Hosting

IONOS (1&1)

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

14 Technologies Detected

Analytics

Advertising

Google Ads LinkedIn Ads TikTok Pixel Microsoft Advertising

Meta Frameworks

CSS Frameworks

Marketing

Reviews

Web Servers

Customer Support

SEO Analysis

B79/100

Meta Tags15/15

Content10/12

Headings8/8

Technical22/25

E-E-A-T2/7

Images3/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile3/4

Indexability3/3

1and1.com1and1.com

IONOS » Hosting Provider | Websites. Domains. Server.

IONOS, your digital partner for cloud solutions and web hosting, supporting your needs from websites, domains, servers, and more.

Title Length53 chars

Recommended: 50-60 chars (~320px / 580px)

Description Length129 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (108/175) — critical for accessibility and SEO

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,027 URLs

robots.txt

18 rules

Sitemap reference found

Local SEO

Local Search Readiness

35/100

Needs Work

10 10 1

Sponsored

AI & LLM Readiness

D41/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

3/25

Citation

10/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:2%

Words:1,892

Token eff.:Optimal

Depth:1/5

Structured Data

1 JSON-LD

WebSite

sameAs entity links

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

72/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

8/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

8/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

6/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

70/100

101 mg

CO₂e / view

997.7 KB

Page Weight

70%

Cleaner Than

New Visitor

115 mg

Returning (cached)

58 mg

Annual (10K/mo)

12.1 kg

Emission Segments

Data Center

5 mg

Network

30 mg

Device

66 mg

Resource Breakdown

JavaScript

688.4 KB

Images

26.1 KB

CSS

170.2 KB

Fonts

32.8 KB

HTML

71.1 KB

Other

9.0 KB

Green Hosting Verified

IONOS SE

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

56%Poor

Interactive

HTTPS

No WAF

166d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

06.10.2025

Valid Until

06.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

ionos.com1and1.cloud1and1.com1and1.usdeploy-now.appdeploy-now.devdeploy-now.infodeploy-now.online+12 more

SHA-256 Fingerprint

06:0E:7F:BA:B3:0A:5E:A4:21:49:DF:CF:67:98:6A:82:FD:95:50:FB...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 600s(public, max-age=600 must-revalidate)

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors 'self'

content-type

text/html

date

Thu, 23 Apr 2026 19:26:08 GMT

etag

"a994b-6500d0790f000-gzip"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mxint02.1and1.com

mxint01.1and1.com

Domain Information

1and1.com

Domain Age

28y 7m

Created

28.09.1997

Expires

27.09.2026

Last Updated

28.09.2025

Registrar

IONOS SE

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

82/100

Mobile Friendly23 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, height=device-height, initial-scale=1.0, minimum-scale=1.0, maximum-scale=5.0

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Overpass Regular + Open Sans Regular

WCAG Partial

70/100

Readability

/30

24/30

16px · LH 1.50

Hierarchy

/20

17/20

2.5x ratio · ✓ H1→H6

WCAG

/25

15/25

1:1 min contrast

Performance

/25

14/25

3 fonts · 6 req

Heading Font

Overpass Regular

Sans40px

Body Font

Open Sans Regular

Sans16px

Contrast Ratio

1:1

12 issues

Reading Comfort

~34 CPL

Narrow lines

40px

48px

32px

16px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 41/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 12 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

Buy on MyFontsFlesch 41

Color Palette

12 unique colors

10.26:1 AAA Light

#ffffff

Background· 34%

#404049

Other· 6.5%

#001b42

Primary· 10.8%

#939dac

Border· 9%

#1d2a3a

Secondary· 4.8%

#081529

Accent· 3.2%

#86abbc

Secondary· 1.3%

Business & Marketing Stack

8 Tools Detected

Enterprise

CRM Systems

HubSpotMid-Market

Customer Relationship Management platforms

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

TikTok PixelMid-Market

Microsoft AdsEnterprise

Reddit PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

bat.bing.com(3)analytics.tiktok.com(3)googletagmanager.com(2)frontend-services.ionos.com(2)connect.facebook.net(2)

Website Identity

IONOS

Corporation

+1484-424-7392

www.ionos.com/

28 years old

2 Logan Square, 100 N 18th St., Suite 400, Philadelphia

PA 19103, Philadelphia, Pennsylvania

Location detected: 🇺🇸 United States, Philadelphiavia schema_nap

IONOS SEen

Social Profiles

Facebook Instagram TikTok

Sponsored

Last analyzed: 23 Apr 2026 at 19:26

Historical Analysis & Change Tracking