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

survio.com

https://survio.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

survio.com

Sponsored

Hosting Provider

NETHOST s.r.o

IP Address

93.185.108.225

Server Location

🇨🇿 Brno, Czechia

ASN

AS43541

Organization

NETHOST s.r.o

CDN

Azure Cdn

Nameservers

ns4-35.azure-dns.info.ns1-35.azure-dns.com.ns2-35.azure-dns.net.ns3-35.azure-dns.org.

Performance

Page Speed

27 KB

44 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

HubSpot CMS

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

9 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Matomo Microsoft Clarity

Libraries

CSS Frameworks

Tag Managers

Customer Support

Marketing

SEO Analysis

A88/100

survio.comsurvio.com

Online Survey Software – Create Free Surveys | Survio®

Create free online surveys and questionnaires in minutes. Collect responses and see results instantly. GDPR & ISO 27001.

Title Length54 chars

Recommended: 50-60 chars

Description Length120 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

51 URLs

robots.txt

88 rules

Sitemap reference found

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

46d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

05.01.2026

Valid Until

05.04.2026

Subject Alternative Names (2)

*.survio.comsurvio.com

SHA-256 Fingerprint

11:0B:60:7F:69:EB:5A:6E:69:17:BB:77:3B:A2:07:DB:29:9A:2D:97...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 0s(max-age=0, must-revalidate, private)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Tue, 17 Feb 2026 18:24:09 GMT

expires

Tue, 17 Feb 2026 18:24:09 GMT

strict-transport-security

max-age=31536000; includeSubDomains

Good Warning Issue

Email Infrastructure

Google Workspace

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt2.aspmx.l.google.com

aspmx.l.google.com

alt1.aspmx.l.google.com

aspmx2.googlemail.com

+1 more

Domain Information

survio.com

Domain Age

22y 11m

Created

12.03.2003

Expires

12.03.2030

Last Updated

22.11.2022

Registrar

CSL Computer Service Langenbach GmbH d/b/a joker.com

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Legitimate interest basis mentioned

Typography & Readability

Inter Bold + sans-serif

55/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

18/25

4.27x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Inter Bold

Sans64px

Body Font

sans-serif

Sans15px

Contrast Ratio

Reading Comfort

~46 CPL

Optimal (45–75)

64px

42px

50px

15px

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.3x larger than 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.

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

Buy on MyFonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Customer Support

IntercomMid-Market

Live chat and helpdesk tools

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

18 Resources

Scripts

Styles

Async

Defer

Top Script Sources

prod-8f86.kxcdn.com(5)googletagmanager.com(3)consent.cookiebot.eu(2)widget.intercom.io(1)scripts.clarity.ms(1)

Website Identity

Facebook X (Twitter)LinkedIn

Sponsored

Last analyzed: 17 Feb 2026 at 18:24

Historical Analysis & Change Tracking