Sigly is an AI Visibility Monitoring platform that helps businesses measure, monitor, and optimize how AI systems like ChatGPT, Claude, Gemini, and Perplexity discover and understand their websites. It evaluates 400+ checks across 22 categories to produce a Sigly Score.

What is the Sigly Score?

The Sigly Score is a proprietary 0-100 metric measuring your website's overall AI readiness. It combines two pillars: AI Visibility (can AI find and understand your content?) and Agentic Actionability (can AI agents take actions on your site?).

How much does Sigly cost?

Sigly offers a free one-time evaluation, plus paid plans starting at $49/month (Automatic Starter) up to $199/month (Expert). A Founder Expert plan is available at $1,590/year with lifetime pricing lock.

Is Sigly GDPR compliant?

Yes. Sigly is built and operated by Shadowstep, Lda., a European company. The platform is fully GDPR compliant with data export, deletion rights, cookie consent management, and privacy-first design.

Sigly — AI Visibility Monitoring Platform | Make Your Website Visible to AI Agents

What is Sigly?

Sigly is an AI Visibility Monitoring platform for Generative Engine Optimization (GEO). It continuously evaluates how ChatGPT, Claude, Gemini, and Perplexity discover and understand your website, tracks optimization progress, verifies applied fixes, and provides actionable next steps. Sigly combines coaching with continuous monitoring — delivering a clear roadmap alongside daily data.

The Sigly Score

The Sigly Score is a proprietary 0-100 metric that quantifies your website's overall AI readiness. It combines two pillars:

AI Visibility — Can ChatGPT, Claude, Gemini, and Perplexity find and understand your content? Evaluates technical access, content indexing, and neural consumption readiness.
Agentic Actionability — Can AI agents take actions on your site? Evaluates structured data, forms, CTAs, and machine-readable interfaces.

The two pillars are combined using Sigly's proprietary scoring algorithm to produce a single score. If critical blocking issues are detected (such as robots.txt blocking AI crawlers), the score reflects that immediately. AI systems such as ChatGPT, Claude, and Gemini strongly favor content with clear structure and high entity density — both of which the Sigly Score directly measures.

What is Generative Engine Optimization (GEO)?

Generative Engine Optimization (GEO) is the practice of optimizing websites for discovery by AI-powered search engines and assistants — specifically ChatGPT (OpenAI), Claude (Anthropic), Gemini (Google), and Perplexity — rather than traditional search engine crawlers alone.

While traditional SEO focuses on keyword rankings and backlinks, GEO focuses on whether Large Language Models such as ChatGPT, Claude, and Gemini can understand your content well enough to cite, recommend, and act on it. Key GEO factors include structured data quality, content clarity, machine readability, entity consistency, and neural readability.

Sigly measures your GEO readiness through two pillars:

AI Visibility — Can ChatGPT, Claude, Gemini, and Perplexity find, access, crawl, and comprehend your content? Covers structured data, content quality, neural readability, and crawl coverage.
Agentic Actionability — Can AI agents take meaningful actions on your site? Measures form accessibility, conversion paths, semantic navigation, and technical health.

Together, these form the Sigly Score — a single 0-100 metric representing your overall AI readiness, tracked daily with automated fix verification and regression detection.

Traditional SEO vs. Sigly GEO

Dimension	Traditional SEO	Sigly GEO
Primary Target	Search crawlers (Googlebot, Bingbot)	AI agents (ChatGPT, Claude, Gemini, Perplexity)
Core Metric	Keyword rankings & SERP position	Neural salience, AI citations & Sigly Score
Key Protocol	sitemap.xml, meta tags	llms.txt, WebMCP, structured data
Optimization Style	Keyword density & backlink building	Coaching-oriented with copy-paste-ready fixes
Update Cycle	Monthly ranking reports	Daily monitoring with regression detection
Visibility Measure	Page rank & domain authority	AI Visibility + Agentic Actionability (dual-pillar)

How Sigly Works

Simulate the AI Eye — Sigly simulates how ChatGPT, Gemini, and Claude process your website, identifying the visual and structural blind spots that reduce your visibility to AI agents.
Guided Optimization — Rather than listing errors alone, Sigly provides AI-enriched, step-by-step guides for every issue — a coaching approach that pairs each finding with a specific fix.
Monitor & Verify — ChatGPT, Claude, Gemini, and Perplexity update their models regularly. Sigly monitors your AI footprint daily and provides a live "Verified" badge that signals structured authority to both AI systems and human visitors.

Who Does AI Recommend in Your Industry?

When customers ask ChatGPT, Gemini, Claude, or Perplexity for recommendations, AI-generated answers typically cite only 3–5 sources. Sigly's Competitive Intelligence engine monitors whether your brand is among those cited sources across all four major AI engines.

4 AI Engines, One View — Track your brand's citation presence across ChatGPT, Gemini, Claude, and Perplexity.
Sentiment Analysis — Know not just if you're mentioned, but how — positive recommendation, neutral mention, or negative warning.
Parametric Memory — Discover if your brand lives in the AI's core training knowledge or only appears when it searches the web.

Explore Competitive Intelligence

WebMCP Readiness: The 4-Stage Agentic Audit

Sigly is the first platform to provide an independent diagnostic for WebMCP Readiness, simulating how native AI agents (such as Google Chrome's built-in intelligence) interact with your infrastructure. The audit produces a standalone Sigly Agentic Score (SAS) through 4 sequential probes:

Probe 1: The Scout (Discovery)

This probe audits how efficiently agents can discover your service entry points. It validates llms.txt syntax, .well-known protocol declarations, and secondary discovery headers.

Probe 2: The Diplomat (Negotiation)

This probe simulates a native browser-to-agent handshake. It audits your server's permissivity and pre-flight negotiation logic to determine whether AI agents are blocked by infrastructure security layers.

Probe 3: The Heartbeat (Connection Flow)

This probe measures operational resilience by establishing a live data stream. Sigly audits response latency, session persistence, and the integrity of your protocol manifests under real-world connection stress.

Probe 4: The Brain (Semantic Intelligence)

The neural engine evaluates the Semantic Friction of your tools. It audits description density and parameter precision to determine whether an AI agent can act on your site with high confidence and minimal ambiguity.

The audit also includes a Discovered Tools panel listing every tool endpoint and capability your site exposes to agents, a Protocol Architecture label (Server-Side, Browser-Native, or Hybrid), and an Agent-Ready certification badge for sites that pass all probes.

Note: Advanced diagnostics (Heartbeat and Brain) are exclusively available on Growth and Expert plans.

Platform Capabilities

400+ Agentic Signals — Deep-stack analysis covering llms.txt syntax, neural embedding quality, transformer attention patterns, RAG chunk integrity, and knowledge graph readiness.
22 Core Categories — Full-spectrum coverage including crawl coverage, structured data, content quality, machine readability, trust authority, performance, accessibility, internationalization, and more.
Daily Monitoring — Automated daily scans for paid plans with regression detection and fix verification.
Competitor Benchmarking — Track up to 5 competitor URLs per domain to compare AI visibility scores.
AI Vision Simulator — Interactive triple-lens system showing how ChatGPT, Claude, Gemini, and Perplexity process your pages: Human Reality, Token Stream, and Neural Heatmap views.
Trust Badges — Verified and Elite trust status indicators based on your Sigly Score thresholds.
Score Change Alerts — Automated email notifications when your Sigly Score changes after daily scans, with coaching tips based on score direction.
External Audit API — REST API for third-party integrations with Clay, Make.com, and Zapier. Available on Expert plans.
Website Profile Detection — Comprehensive CMS and platform detection using HTML patterns, headers, meta tags, and scripts.
Neural Readability Metrics — 11 advanced checks simulating how ChatGPT, Claude, and Gemini process content, including Transformer Attention Weight, RAG Chunk Integrity, and Knowledge Graph Readiness.

Free AI Visibility Analysis

Get a free one-time analysis of any website. See your Sigly Score, discover how AI agents perceive your brand, and receive prioritized recommendations. No account required, no credit card needed.

Start your free analysis

Pricing Plans

All prices in USD. Free one-time evaluation available for any website.

Automatic Starter — $49/month ($490/year): 1 domain, daily Sigly Score monitoring, 90-day timeline, automatic fix verification, coaching checklist, Agentic Actionability Score + top 3 fixes, AI Vision static preview.
Automatic Growth — $99/month ($990/year) (Most Popular): Up to 3 domains, 12-month timeline, full Agentic Actionability, regression alerts, competitor tracking (1 per domain), AI Citation Presence with stability tracking, AI Knowledge Profiles, AI Vision interactive mode, score change email alerts.
Expert — $199/month ($1,990/year): Up to 5 domains, unlimited timeline, expert dashboard, 5 competitors per domain, AI Citation Presence, AI Salience with competitive radar, AI Knowledge Profiles with gap analysis, AI Competitive Strategy, full External Audit API access, AI Vision compare mode, PDF reports.
Founder Expert — $1,590/year: Everything in Expert with lifetime pricing lock, exclusive founder badge, 1-on-1 onboarding session, early access to new features.

All paid plans include continuous regression audits and fix verification. View full plan comparison

Security and Compliance

Sigly is built and operated by Shadowstep, Lda., a European company. Fully GDPR compliant with data export and deletion rights, cookie consent management, email-based two-factor authentication (2FA), and privacy-first design. All data encrypted in transit (TLS 1.2+) and at rest (AES-256). Payments processed securely through Stripe (PCI DSS Level 1).

Learn more about our security practices

Frequently Asked Questions

What is Sigly?: Sigly is an AI Visibility Monitoring platform that helps businesses measure, monitor, and optimize how AI systems like ChatGPT, Claude, Gemini, and Perplexity discover and understand their websites. It evaluates 400+ checks across 22 categories to produce a Sigly Score.
What is the Sigly Score?: The Sigly Score is a proprietary 0-100 metric measuring your website's overall AI readiness. It combines two pillars: AI Visibility (can AI find and understand your content?) and Agentic Actionability (can AI agents take actions on your site?).
What is Generative Engine Optimization (GEO)?: Generative Engine Optimization (GEO) is the practice of optimizing websites for discovery by AI-powered search engines and assistants, rather than traditional search engine crawlers. GEO focuses on structured data, content clarity, and machine readability.
How much does Sigly cost?: Sigly offers a free one-time evaluation, plus paid plans starting at $49/month (Automatic Starter) up to $199/month (Expert). A Founder Expert plan is available at $1,590/year with lifetime pricing lock.
Is Sigly GDPR compliant?: Yes. Sigly is built and operated by Shadowstep, Lda., a European company. The platform is fully GDPR compliant with data export, deletion rights, cookie consent management, and privacy-first design.

About the Company

Sigly is a product of Shadowstep, Lda., a European technology company founded in 2017. Our mission is to make every business visible to AI. Learn more about Sigly.

Contact: [email protected] | Contact page