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

storytel.com

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

Export

storytel.com

Sponsored

Hosting Provider

Fastly, Inc.

IP Address

151.101.1.55

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

CDN

Fastly

Nameservers

ns-cloud-c2.googledomains.com.ns-cloud-c1.googledomains.com.ns-cloud-c4.googledomains.com.ns-cloud-c3.googledomains.com.

Performance

Page Speed

2.3 MB

110 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

JAMstack

⚙️ SSR

Decoupled

Frontend

Framework

Next.js

API

Data Source

Headless CMS

Contentful

Infrastructure

Hosting

Fastly, Inc.

CDN

Fastly

Progressive Web App

Web ManifestApple Touch IconTheme Color

Detected API Sources

https://images.ctfassets.net/e...

Technology Stack

9 Technologies Detected

Analytics

Meta Frameworks

CSS Frameworks

Tag Managers

Customer Support

Payments

Security

SEO Analysis

C62/100

storytel.comstorytel.com

Storytel – parhaat äänikirjat ja e-kirjat

Kirjamakuja on yhtä paljon kuin ihmisiä – kaikki ovat erilaisia, mutta yhtä hyviä. Storytelin valikoimasta löytyy jotain kiinnostavaa, koskettavaa tai avarta...

Description truncated.

Title Length41 chars

Recommended: 50-60 chars

Description Length172 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (495/706)

5 issues found

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Crawlability

Sitemap

Type: index

robots.txt

31 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

16d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Certainly

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

06.02.2026

Valid Until

08.03.2026

Subject Alternative Names (2)

*.storytel.comstorytel.com

SHA-256 Fingerprint

A5:A4:1A:D0:89:BF:37:2A:61:87:C2:34:55:64:04:7A:B3:47:42:92...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

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HTTP Headers

Developer Console

accept-ranges

bytes

age

211111

alt-svc

h3=":443";ma=86400,h3-29=":443";ma=86400,h3-27=":443";ma=864...

cache-control

🟡 1 Hours(public, max-age=3600, s-maxage=604800, stale-while-revalidat...)

content-encoding

📦 Gzip(gzip)

content-length

69899

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt4.aspmx.l.google.com

alt3.aspmx.l.google.com

alt1.aspmx.l.google.com

alt2.aspmx.l.google.com

+1 more

Domain Information

storytel.com

Domain Age

16y 3m

Created

06.11.2009

Expires

06.11.2030

Last Updated

12.03.2025

Registrar

EuroDNS S.A.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

StorytelEuclid

63/100

Readability

/30

32/40

17px · LH 1.23

Hierarchy

/20

8/25

1.38x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

StorytelEuclid

Sans24px

Body Font

StorytelEuclid

Sans17px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

24px

19px

12px

17px

✅ Excellent readability: 17px body text is ideal for all devices.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Good performance: Using 2 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: 93 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

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

27 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(15)consent.cookiebot.com(2)googletagmanager.com(2)sgtm.storytel.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn Pinterest

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Last analyzed: 19 Feb 2026 at 21:18

Historical Analysis & Change Tracking