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

otzovik.com

https://otzovik.com· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

otzovik.com

Mobile

Sponsored

Hosting Provider

Selectel

IP Address

31.41.158.200

Server Location

🇷🇺 St Petersburg, Russia

ASN

AS49505

Organization

Selectel

Server

Nginx

Nameservers

ns1.otzovik.com.ns2.otzovik.com.

Performance

Page Speed

258 KB

7 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Selectel

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

4 Technologies Detected

CSS Frameworks

Web Servers

Languages

Security

SEO Analysis

F29/100

otzovik.comotzovik.com

Отзовик - Вы робот?

No description available for this page.

Title Length19 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Many images missing alt text (2/2)

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

274 URLs

robots.txt

43 rules

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

305d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

20.11.2025

Valid Until

21.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.otzovik.comotzovik.com

SHA-256 Fingerprint

06:B9:ED:C0:95:D4:B9:4B:17:91:33:EA:1F:FE:66:EB:9E:37:15:95...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-type

text/html; charset=UTF-8

date

Thu, 19 Feb 2026 18:03:49 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

pragma

no-cache

retry-after

3600

Good Warning Issue

Email Infrastructure

Yandex Mail

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

sendmail.otzovik.com

mx.yandex.net

Domain Information

otzovik.com

Domain Age

15y 11m

Created

30.03.2010

Expires

30.03.2027

Last Updated

07.02.2026

Registrar

Regtime Ltd.

DNSSEC

Not Enabled

Typography & Readability

GolosTextVF

70/100

Readability

/30

22/40

14px · LH --

Hierarchy

/20

20/25

1.71x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

GolosTextVF

Sans24px

Body Font

GolosTextVF

Sans14px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

24px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Good hierarchy: Clear distinction between headlines and 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.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Sponsored

Scripts & Styles

1 Resources

Scripts

Styles

Async

Defer

Top Script Sources

Sponsored

Last analyzed: 19 Feb 2026 at 18:03

Historical Analysis & Change Tracking