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

tenable.com

https://tenable.com· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

tenable.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

54.159.189.155

Server Location

🇺🇸 Ashburn, United States

ASN

AS14618

Organization

AWS EC2 (us-east-1)

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns3.tenablesecurity.com.ns2.tenablesecurity.com.ns1.tenablesecurity.com.

Performance

Page Speed

4.4 MB

114 requests

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Detected API Sources

/evaluations/api/v1/tenable-ev...

Technology Stack

5 Technologies Detected

Libraries

CSS Frameworks

Analytics

Tag Managers

CDN

SEO Analysis

A+90/100

tenable.comtenable.com

Exposure Management | Cloud Security | Vulnerability Management | T...

The architect of exposure management, Tenable helps you know, expose and close cyber risk with robust cloud security and vulnerability management tools.

Title truncated.

Title Length74 chars

Recommended: 50-60 chars

Description Length152 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

robots.txt

53 rules

Sitemap reference found

Sponsored

Security Score

56%Poor

Interactive

HTTPS

WAF

10d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.02.2025

Valid Until

25.02.2026

OCSP Stapling

Enabled

Subject Alternative Names (14)

*.cloud.tenable.com*.cloud.nessus.orgsvc.nessus.org*.svc.nessus.orgtenable.com*.tenable.comtenable.io*.tenable.io+6 more

SHA-256 Fingerprint

E1:99:E4:0B:04:64:CB:20:73:AE:8E:6A:30:31:F8:C9:27:8D:59:A2...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age

9859

cache-control

🟡 6 Hours(public, max-age=21600)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9ce0b4c3e9b337ec-FRA

content-encoding

⚡ Brotli(br)

content-language

Good Warning Issue

Email Infrastructure

Mimecast

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

us-smtp-inbound-1.mimecast.com

us-smtp-inbound-2.mimecast.com

Domain Information

tenable.com

Domain Age

28y 10m

Created

10.04.1997

Expires

11.04.2028

Last Updated

11.01.2023

Registrar

Amazon Registrar, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

aeonik pro

86/100

Readability

/30

40/40

16px · LH 1.44

Hierarchy

/20

25/25

5.62x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

aeonik pro

Sans90px

Body Font

aeonik pro

Sans16px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

90px

34px

16px

40px

16px

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

✅ Optimal line spacing: 1.44 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 5.6x 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.

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Enterprise

Marketing Automation

MarketoEnterprise

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

play.vidyard.com(8)googletagmanager.com(4)info.tenable.com(3)tr.capterra.com(2)d34r8q7sht0t9k.cloudfront.net(1)

Website Identity

tenable.com

28 years old

Amazon Registrar, Inc.📧 Mimecast

Social Profiles

Facebook X (Twitter)Instagram LinkedIn YouTube

Sponsored

Last analyzed: 15 Feb 2026 at 00:32

Historical Analysis & Change Tracking