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.

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tau.ac.il

https://tau.ac.il· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

tau.ac.il

$Desktop screenshot of tau.ac.il$

$Mobile screenshot of tau.ac.il$

Mobile

Sponsored

Hosting Provider

F5 Anycast

IP Address

159.60.138.158

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS35280

Organization

F5 Anycast

Server

volt-adc

Nameservers

sdns.tau.ac.il.relay3.huji.ac.il.relay4.huji.ac.il.relay2.huji.ac.il.+1 more

Performance

Page Speed

2 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

9 Technologies Detected

Analytics

Meta Frameworks

Libraries

UI Components

CSS Frameworks

Tag Managers

Advertising

SEO Analysis

D52/100

tau.ac.iltau.ac.il

האוניברסיטה הגדולה והמגוונת בישראל | אוניברסיטת תל אביב

אוניברסיטת תל-אביב היא אוניברסיטת המחקר הגדולה בישראל עם יותר מ-25,000 סטודנטים.

Title Length55 chars

Recommended: 50-60 chars

Description Length80 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (18/32)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

91 rules

Sponsored

Security Score

61%Fair

Interactive

HTTPS

No WAF

53d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

07.01.2026

Valid Until

07.04.2026

Subject Alternative Names (4)

*.m.tau.ac.il*.tau.ac.iltau.ac.ilwww.socialwork.tau.ac.il

SHA-256 Fingerprint

58:74:DD:F5:73:3B:41:D1:F1:40:56:21:62:E8:E1:56:B5:C9:F8:B4...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

cache-control

🟡 900s(public, max-age=900)

content-encoding

📦 Gzip(gzip)

content-language

content-length

20259

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mxtau.tau.ac.il

Domain Information

tau.ac.il

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Open Sans Hebrew + arial

58/100

Readability

/30

22/40

14px · LH --

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Open Sans Hebrew

Sans

Body Font

arial

Sans14px

Contrast Ratio

Reading Comfort

Dual Sans-Serif

left aligned

20px

14px

Minor Second

Scale

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

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

⚠️ Cramped layout: 23 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(11)connect.facebook.net(5)cdn.appdynamics.com(2)googletagmanager.com(2)

Website Identity

Facebook Instagram YouTube TikTok

Sponsored

Last analyzed: 13 Feb 2026 at 09:24

Historical Analysis & Change Tracking