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.

Technology Comparison

Prc Icon Library vs Facebook SDK

Side-by-side comparison based on real-world adoption data from 966 detections across analyzed websites.

Market Share Distribution

Prc Icon Library (1%)Facebook SDK (99%)

Total Detections

Prc Icon Library

959

Facebook SDK

HIGHER

Websites Using

Prc Icon Library

959

Facebook SDK

HIGHER

Used Together

websites use both

Prc Icon Library

Libraries

7 detections

7 sites

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Facebook SDK

Libraries

The Facebook SDK (Software Development Kit) is a collection of tools, libraries, and documentation that allows developers to integrate Facebook features into their own applications and websites. It enables functionalities such as user login, content sharing, and access to Facebook data.

959 detections

959 sites

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Our Analysis

Facebook SDK is significantly more popular than Prc Icon Library in our dataset, appearing on 959 websites compared to 7. Both are in the Libraries category, making them direct alternatives.

Sites Using Both (0)

No sites use both technologies together.

Only Prc Icon Library

journalism.org people-press.org pewforum.org pewglobal.org pewinternet.org pewresearch.org pewsocialtrends.org

Only Facebook SDK

10news.com 3dnews.ru 3dprint.com 972mag.com 9gag.com aacap.org abajournal.com abc.es abc15.com abcactionnews.com

Frequently Asked Questions

What is the difference between Prc Icon Library and Facebook SDK?

The Prc Icon Library is a collection of SVG icons developed by the Pew Research Center, designed for use in data visualizations and web content. It provides a consistent visual language for representing various concepts and data points. The Facebook SDK (Software Development Kit) is a collection of tools, libraries, and documentation that allows developers to integrate Facebook features into their own applications and websites. It enables functionalities such as user login, content sharing, and access to Facebook data. Both belong to the Libraries category, making them direct alternatives.

Which is more popular, Prc Icon Library or Facebook SDK?

Based on our analysis of real websites, Facebook SDK is more widely adopted with 959 detections compared to Prc Icon Library's 7.

Can Prc Icon Library and Facebook SDK be used together?

In our current dataset, no websites use both technologies simultaneously. This suggests they typically serve as alternatives rather than complementary tools.

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Find out if a website uses Prc Icon Library, Facebook SDK, or any other technology.

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