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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sfstandard.com

https://sfstandard.com· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

sfstandard.com

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.67.128.101

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

mallory.ns.cloudflare.com.yevgen.ns.cloudflare.com.

Performance

Page Speed

1.7 MB

95 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Next.js

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

13 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Sentry

Fonts

Google Fonts Adobe Fonts (Typekit)

Meta Frameworks

Other

CSS Frameworks

Tag Managers

Payments

CDN

Frameworks

Security

SEO Analysis

A88/100

sfstandard.comsfstandard.com

The San Francisco Standard

The San Francisco Bay Area's essential source for daily news, politics, business, food, tech and culture coverage.

Title Length26 chars

Recommended: 50-60 chars

Description Length114 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

202 rules

Sitemap reference found

Sponsored

Security Score

65%Fair

Critical / Transactional

HTTPS

WAF

71d

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

01.02.2026

Valid Until

02.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

sfstandard.com*.sfstandard.com

SHA-256 Fingerprint

E1:92:A6:AD:C3:2B:7D:53:1D:B5:A8:4E:97:1D:1A:A9:52:63:CB:80...

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(no-cache, must-revalidate, max-age=0, no-store, private)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9d05d4ed0c3f9e0d-FRA

content-encoding

zstd

content-security-policy

default-src 'self' *.sfstandard.com sfstandard.com; script-s...

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt2.aspmx.l.google.com

aspmx.l.google.com

alt1.aspmx.l.google.com

aspmx3.googlemail.com

+1 more

Domain Information

sfstandard.com

Domain Age

4y 4m

Created

28.09.2021

Expires

28.09.2026

Last Updated

29.08.2025

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Inter + sans-serif

56/100

Readability

/30

20/40

10px · LH 1.50

Hierarchy

/20

13/25

1.6x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Inter

Sans16px

Body Font

sans-serif

Sans10px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

16px

36px

10px

Golden Ratio

Scale

❌ Critical: 10px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and body text.

✅ 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.

GGoogle Fonts AAdobe Fonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(18)googletagmanager.com(1)gstatic.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn TikTok Threads Bluesky

Sponsored

Last analyzed: 19 Feb 2026 at 12:40

Historical Analysis & Change Tracking