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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tacobell.com

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

Export

tacobell.com

Sponsored

Hosting Provider

Akamai Technologies

IP Address

23.50.131.155

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS20940

Organization

Akamai Technologies

Server

LiteSpeed

Nameservers

eur1.akam.net.asia1.akam.net.ns1-219.akam.net.use1.akam.net.+4 more

Performance

Page Speed

995 KB

31 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.1

cms

restel-taco-childCustom

Technology Stack

14 Technologies Detected

Meta Frameworks

Libraries

CSS Frameworks

Fonts

Adobe Fonts (Typekit)Adobe Fonts

Plugins

Icon Libraries

Analytics

Tag Managers

Web Servers

SEO Analysis

D52/100

tacobell.comtacobell.com

Etusivu - Taco Bell

No description available for this page.

Title Length19 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1
• Many images missing alt text (43/44)

4 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

94 rules

Allows all crawlers

Sponsored

Security Score

76%Good

Static / Informational

HTTPS

No WAF

70d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

ZeroSSL

Key Algorithm

RSA (2048 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

29.01.2026

Valid Until

29.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

tacobell.fi

SHA-256 Fingerprint

B5:AB:09:EF:6B:09:1F:76:6C:75:CC:5C:0E:DB:17:DC:0D:AE:A0:05...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-type

text/html; charset=UTF-8

link

<https://tacobell.fi/wp-json/>; rel="https://api.w.org/", <h...

etag

"154202-1771373037;br"

x-litespeed-cache

hit

content-encoding

⚡ Brotli(br)

vary

Accept-Encoding

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

tacobell-com.mail.protection.outlook.com

Domain Information

tacobell.com

Domain Age

30y 6m

Created

30.08.1995

Expires

29.08.2026

Last Updated

25.08.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Typography & Readability

GTAmerica-Condensed + sans-serif

71/100

Readability

/30

40/40

18px · LH 1.60

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

GTAmerica-Condensed

Sans

Body Font

sans-serif

Sans18px

Contrast Ratio

Reading Comfort

~54 CPL

Optimal (45–75)

48px

16px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Good performance: Using 2 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.

✅ Optimal line length: ~54 characters per line is comfortable to read.

AAdobe Fonts Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

tacobell.fi(3)code.jquery.com(2)googletagmanager.com(1)kit.fontawesome.com(1)

Website Identity

Facebook Instagram

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Last analyzed: 18 Feb 2026 at 05:58

Historical Analysis & Change Tracking