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

babbel.com

https://babbel.com· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

babbel.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

13.33.235.94

Server Location

🇺🇸 New York, United States

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

CDN

CloudFront

Nameservers

ns-977.awsdns-58.net.ns-1219.awsdns-24.org.ns-1839.awsdns-37.co.uk.ns-60.awsdns-07.com.

Performance

Page Speed

1016 KB

42 requests

Image Optimization

Lazy LoadWebPAVIFResponsiveVercel Image Optimization

0–49

50–89

90–100

Architecture Stack

JAMstack

⚙️ SSR

Decoupled

Frontend

Framework

Next.js

API

Data Source

Headless CMS

Contentful

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Detected API Sources

/_next/image?url=https%3A%2F%2...

Technology Stack

2 Technologies Detected

Meta Frameworks

Next.js

Customer Support

Zendesk

SEO Analysis

B70/100

babbel.combabbel.com

Learn Spanish, French and Other Languages Online | Babbel

Learn a new language with conversation-based lessons that get you chatting with confidence from day 1. Learn what, when and where you want at your own pace.

Title Length57 chars

Recommended: 50-60 chars

Description Length156 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (11/11)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

60 rules

Sitemap reference found

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

WAF

244d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

18.09.2025

Valid Until

16.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

uk.babbel.com

SHA-256 Fingerprint

FF:F0:CC:2B:53:7D:9B:13:1B:C6:AA:48:43:BC:C8:4B:42:96:4D:42...

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)

content-encoding

⚡ Brotli(br)

content-security-policy

object-src 'none'; frame-ancestors https://app.contentful.co...

content-type

text/html; charset=utf-8

date

Sat, 14 Feb 2026 04:23:46 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (6)

aspmx2.googlemail.com

alt2.aspmx.l.google.com

alt1.aspmx.l.google.com

aspmx3.googlemail.com

+2 more

Domain Information

babbel.com

Domain Age

25y 10m

Created

27.03.2000

Expires

27.03.2026

Last Updated

21.10.2025

Registrar

Amazon Registrar, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Feature Text LC + sans-serif

73/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

18/25

3x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Feature Text LC

Serif48px

Body Font

sans-serif

Sans16px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

48px

16px

Minor Second

Scale

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

⚠️ Cramped layout: 50 elements lack adequate spacing.

⚠️ Inconsistent alignment: Mix of left/center/right creates visual noise.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(17)wt.babbel.com(1)cdn.speedcurve.com(1)

Website Identity

babbel.com

25 years old

Amazon Registrar, Inc.📧 Google Workspace

Social Profiles

Facebook Instagram LinkedIn

Sponsored

Last analyzed: 14 Feb 2026 at 04:23

Historical Analysis & Change Tracking