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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tesa.com

https://tesa.com· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

tesa.com

Mobile

Sponsored

Hosting Provider

NMMN - New Media Markets & Networks

IP Address

188.94.26.111

Server Location

🇩🇪 Neu Wulmstorf, Germany

ASN

AS20694

Organization

NMMN - New Media Markets & Networks

Server

Apache

CDN

CloudFront

Nameservers

ns5.netnames.net.ns6.netnames.net.ns1.netnames.net.ns2.netnames.net.

Performance

Page Speed

2.6 MB

110 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

NMMN - New Media Markets & Networks

CDN

CloudFront

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

4 Technologies Detected

CSS Frameworks

Analytics

Tag Managers

Web Servers

SEO Analysis

A+94/100

tesa.comtesa.com

tesa – global manufacturer of tapes and self-adhesive solutions

tesa creates adhesive solutions that improve the work, products and lives of our customers. We support industry partners, craftspeople and consumer.

Title Length63 chars

Recommended: 50-60 chars

Description Length148 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

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Crawlability

Sitemap

Type: index

47 URLs

robots.txt

10 rules

Sitemap reference found

Sponsored

Security Score

86%Very Good

Interactive

HTTPS

No WAF

159d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

07.07.2025

Valid Until

29.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.tesa.comtesa.com

SHA-256 Fingerprint

85:AF:52:13:39:F9:31:70:64:2D:C1:C8:B0:60:54:98:CE:1E:7F:C6...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age

18525

cache-control

🟡 0s(max-age=0, must-revalidate, public, s-maxage=86400, stale-if...)

content-encoding

📦 Gzip(gzip)

content-security-policy

default-src 'self' https: http://*.hotjar.com:* https://*.ho...

content-type

text/html; charset=UTF-8

date

Thu, 19 Feb 2026 22:11:37 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

tesa-com.mail.protection.outlook.com

Domain Information

tesa.com

Domain Age

28y 9m

Created

29.05.1997

Expires

28.05.2026

Last Updated

25.05.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

consentmanager

Cookie Consent Banner

consentmanager

GDPR Indicators

Cookie consent banner detected

CMP: consentmanager

Data Protection Officer mentioned

Typography & Readability

ProximaNova

73/100

Readability

/30

32/40

19px · LH 1.33

Hierarchy

/20

18/25

2.74x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

ProximaNova

Sans52px

Body Font

ProximaNova

Sans19px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

52px

60px

20px

19px

✅ Excellent readability: 19px body text is ideal for all devices.

✅ Strong hierarchy: Headlines are 2.7x 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.

⚠️ Cramped layout: 54 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

27 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(11)c.delivery.consentmanager.net(3)pulse.tesa.com(2)cdn.consentmanager.net(2)

Website Identity

Facebook Instagram LinkedIn Pinterest

Sponsored

Last analyzed: 20 Feb 2026 at 03:20

Historical Analysis & Change Tracking