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

seventeen.com

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

Export

seventeen.com

Sponsored

Hosting Provider

Fastly, Inc.

IP Address

151.101.128.155

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

CDN

Nameservers

ns-463.awsdns-57.com.ns-760.awsdns-31.net.ns-1364.awsdns-42.org.ns-1585.awsdns-06.co.uk.

Performance

Page Speed

2.1 MB

129 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Next.js

CMS

Magento

Infrastructure

Hosting

Fastly, Inc.

CDN

Technology Stack

6 Technologies Detected

CSS Frameworks

Meta Frameworks

Tag Managers

Advertising

Security

SEO Analysis

B70/100

seventeen.comseventeen.com

Cute Hairstyles, Celeb News, Fun Quizzes, Beauty Advice, and Teen F...

Get the latest fashion, beauty, dating, and health tips. Plus, win freebies, and take quizzes.

Title truncated.

Title Length94 chars

Recommended: 50-60 chars

Description Length94 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

6 URLs

robots.txt

48 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

71%Good

Interactive

HTTPS

No WAF

152d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

18.06.2025

Valid Until

20.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

*.bazaar.com*.25ans.jp*.altaonline.com*.autoweek.com*.bestproducts.com*.bicycling.com*.bringatrailer.com*.caranddriver.com+12 more

SHA-256 Fingerprint

38:FF:24:D9:D9:96:B3:02:54:D1:9B:1A:E0:78:49:C2:0F:4A:32:8B...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

7914

alt-svc

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

cache-control

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

content-encoding

📦 Gzip(gzip)

content-length

80536

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

seventeen-com.mail.protection.outlook.com

Domain Information

seventeen.com

Domain Age

28y 1m

Created

09.01.1998

Expires

08.01.2027

Last Updated

04.01.2026

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Data subject rights referenced

Typography & Readability

GTWalsheim

70/100

Readability

/30

32/40

17px · LH 1.30

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

GTWalsheim

Sans

Body Font

GTWalsheim

Sans17px

Contrast Ratio

Reading Comfort

~47 CPL

Optimal (45–75)

32px

18px

17px

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

✅ 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.

✅ Optimal line length: ~47 characters per line is comfortable to read.

⚠️ Cramped layout: 68 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Reviews & Social Proof

TrustpilotMid-Market

Customer reviews and testimonials

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(15)nexus.ensighten.com(3)securepubads.g.doubleclick.net(1)cdn.cookielaw.org(1)

Website Identity

Facebook X (Twitter)Instagram YouTube TikTok Pinterest

Sponsored

Last analyzed: 18 Feb 2026 at 04:11

Historical Analysis & Change Tracking