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

optimizely.com

https://optimizely.com· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

optimizely.com

Mobile

Sponsored

Hosting Provider

Episerver Stockholm

IP Address

217.114.94.2

Server Location

🇸🇪 Stockholm, Sweden

ASN

AS30811

Organization

Episerver Stockholm

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

doug.ns.cloudflare.com.harmony.ns.cloudflare.com.

Performance

Page Speed

1.5 MB

99 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Tailwind CSS

CMS

Ghost

Infrastructure

Hosting

Episerver Stockholm

CDN

Cloudflare

Technology Stack

11 Technologies Detected

Libraries

Other

CSS Frameworks

Analytics

Tag Managers

Other

CDN

Security

SEO Analysis

A84/100

optimizely.comoptimizely.com

World's leading AI-powered digital experiences - Optimizely

Empowering marketing and digital teams with everything they need to create content fast, test and personalize with ease, and prove impact on business outcomes.

Title Length59 chars

Recommended: 50-60 chars

Description Length159 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

10 rules

Sitemap reference found

Sponsored

Security Score

65%Fair

Interactive

HTTPS

WAF

42d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

28.12.2025

Valid Until

28.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.optimizely.com*.www.optimizely.com

SHA-256 Fingerprint

BE:A1:F1:9F:D2:2C:73:1F:43:10:39:10:4D:23:79:66:DF:E2:D4:AB...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(no-cache, no-store)

cf-cache-status

MISS

cf-ray🇩🇪 Frankfurt

9cd54e0248fd9b9b-FRA

content-encoding

⚡ Brotli(br)

content-security-policy-report-only

connect-src 'self' https://*.adsrvr.org https://*.contentsqu...

Good Warning Issue

Email Infrastructure

Mimecast

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

de-smtp-inbound-1.mimecast.com

de-smtp-inbound-2.mimecast.com

Domain Information

optimizely.com

Domain Age

16y 1m

Created

11.01.2010

Expires

11.01.2027

Last Updated

11.01.2026

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

Figtree

66/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

25/25

4.5x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Figtree

Sans72px

Body Font

Figtree

Sans16px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

72px

48px

30px

24px

16px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.5x larger than 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.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Marketing Automation

MarketoEnterprise

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

A/B Testing & Optimization

OptimizelyEnterprise

Experimentation and conversion optimization

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)gstatic.com(1)googletagmanager.com(1)learn.optimizely.com(1)js.monitor.azure.com(1)

Website Identity

optimizely.com

16 years old

GoDaddy.com, LLC📧 Mimecast

Sponsored

Last analyzed: 13 Feb 2026 at 15:20

Historical Analysis & Change Tracking