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

otzywy.com

https://otzywy.com· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

otzywy.com

Mobile

Sponsored

Hosting Provider

Hosting technology LTD

IP Address

195.2.85.147

Server Location

🇷🇺 Moscow, Russia

ASN

AS48282

Organization

Hosting technology LTD

Server

Nginx

Nameservers

dns3.fastdns24.eu.dns4.fastdns24.link.dns.fastdns24.com.dns2.fastdns24.org.

Performance

Page Speed

457 KB

199 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Hosting technology LTD

Technology Stack

3 Technologies Detected

Libraries

jQuery

CSS Frameworks

Tailwind CSS

Web Servers

Nginxv1.24.0

SEO Analysis

D58/100

otzywy.comotzywy.com

Справочник организаций города Москвы (Россия) - Отзывы.com

Полная актуальная информация о компаниях и учреждениях в Москве, городах России и СНГ. Самое подробное описание организаций, отзывы в интернете, адреса офици...

Description truncated.

Title Length66 chars

Recommended: 50-60 chars

Description Length243 chars

Recommended: 120-160 chars

Issues (0)

6 issues found

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Crawlability

Sitemap

Type: standard

robots.txt

18 rules

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

89d

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/1.1

Valid From

18.02.2026

Valid Until

19.05.2026

Subject Alternative Names (5)

kaz.otzywy.comkg.otzywy.comotzywy.comukr.otzywy.comwww.otzywy.com

SHA-256 Fingerprint

96:12:FD:35:A4:5A:49:58:F8:C0:68:B8:A7:0F:C4:DE:F9:8A:50:39...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

keep-alive

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=utf-8

date

Wed, 18 Feb 2026 06:32:14 GMT

etag

W/"69951e58-20b03"

last-modified

Wed, 18 Feb 2026 02:05:12 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

emx.mail.ru

Domain Information

otzywy.com

Domain Age

8y 11m

Created

21.03.2017

Expires

21.03.2028

Last Updated

19.12.2022

Registrar

Regional Network Information Center, JSC dba RU-CENTER

DNSSEC

Not Enabled

Typography & Readability

Arial

65/100

Readability

/30

20/40

12px · LH 1.50

Hierarchy

/20

20/25

1.75x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Arial

Sans21px

Body Font

Arial

Sans12px

Contrast Ratio

Reading Comfort

~600 CPL

Needs attention

21px

18px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and body text.

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

✅ 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.

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

yandex.ru(3)adzone.innovation-lab.ru(3)catsnetwork.ru(2)content.adriver.ru(2)yastatic.net(2)

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Last analyzed: 18 Feb 2026 at 06:32

Historical Analysis & Change Tracking