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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torproject.org

https://torproject.org· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

torproject.org

Mobile

Sponsored

Hosting Provider

The Tor Project, Inc

IP Address

204.8.99.144

Server Location

🇺🇸 Winchester, United States

ASN

AS62744

Organization

The Tor Project, Inc

Server

Apache

Nameservers

ns1.torproject.org.ns2.torproject.org.nsp.dnsnode.net.ns5.torproject.org.+2 more

Performance

Page Speed

1.6 MB

35 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

Infrastructure

Hosting

The Tor Project, Inc

Technology Stack

6 Technologies Detected

CSS Frameworks

Libraries

Other

Icon Libraries

Web Servers

SEO Analysis

C64/100

torproject.orgtorproject.org

Tor Project | Anonymity Online

Anonymity Online | Defend yourself against tracking and surveillance. Circumvent censorship.

Title Length30 chars

Recommended: 50-60 chars

Description Length92 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

3 rules

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

No WAF

73d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

26.01.2026

Valid Until

26.04.2026

Subject Alternative Names (1)

www.torproject.org

SHA-256 Fingerprint

4A:88:7F:DC:03:A7:AE:28:5F:91:1E:05:DA:33:23:6C:29:D6:CD:AA...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🟡 1 Hours(max-age=3600)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-language

content-length

4791

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mx-dal-01.torproject.org

Typography & Readability

Source Sans Pro Light + Source Sans Pro

78/100

Readability

/30

40/40

21px · LH 1.54

Hierarchy

/20

18/25

4.23x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Source Sans Pro Light

Sans88px

Body Font

Source Sans Pro

Sans21px

Contrast Ratio

Reading Comfort

Dual Sans-Serif

left aligned

88px

32px

28px

24px

21px

✅ Excellent readability: 21px body text is ideal for all devices.

✅ Optimal line spacing: 1.54 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.2x larger than body text.

⚠️ Cramped layout: 10 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

static(7)

Website Identity

Facebook X (Twitter)Instagram LinkedIn GitHub Telegram Mastodon

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Last analyzed: 11 Feb 2026 at 11:37

Historical Analysis & Change Tracking