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

cntd.ru

https://cntd.ru· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

cntd.ru

Sponsored

Hosting Provider

Mostcom PK Joint Stock Company

IP Address

5.61.15.145

Server Location

🇷🇺 St Petersburg, Russia

ASN

AS199072

Organization

Mostcom PK Joint Stock Company

Server

Nginx

Nameservers

ns3.kodeks.ru.ns2.kodeks.ru.

Performance

Page Speed

1.3 MB

23 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Mostcom PK Joint Stock Company

Technology Stack

5 Technologies Detected

Frameworks

Libraries

CSS Frameworks

Web Servers

Languages

SEO Analysis

F29/100

cntd.rucntd.ru

Техэксперт - Ведущий бренд рынка нормативно-технической информации

Профессиональные справочные системы «Техэксперт» включают в себя нормативно-техническую документацию, нормативно-правовые акты, технологичес...

Description truncated.

Title Length66 chars

Recommended: 50-60 chars

Description Length216 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (2/2)

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

robots.txt

34 rules

Sitemap reference found

Sponsored

Security Score

41%Poor

Interactive

HTTPS

No WAF

173d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

08.07.2025

Valid Until

09.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.cntd.rucntd.ru

SHA-256 Fingerprint

F0:29:0C:DB:64:0B:5D:A0:EC:97:36:FA:FC:CA:84:AD:4C:BE:54:A6...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache, private)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Mon, 16 Feb 2026 13:00:59 GMT

server

nginx

trademark

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mail.kodeks.ru

Domain Information

cntd.ru

Domain Age

20y 8m

Created

20.06.2005

Expires

20.06.2026

Registrar

RU-CENTER-RU

DNSSEC

Not Enabled

Typography & Readability

Arial

48/100

Readability

/30

25/40

18px · LH 1.09

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Arial

Body Font

Arial

Sans18px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

18px

✅ Excellent readability: 18px body text is ideal for all devices.

⚠️ Tight line spacing (1.09). Consider 1.4-1.6 for better readability.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

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

✅ Clean layout: Consistent left alignment throughout.

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

6 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)cs15.livetex.ru(1)mc.yandex.ru(1)

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Last analyzed: 16 Feb 2026 at 13:01

Historical Analysis & Change Tracking