# DecaGEO

## Docs

- [8 Weeks of AI Recommendations: 5 of 10 Markets Changed](https://decageo.ai/docs/8-weeks-ai-recommendations.md): DecaGEO tracked 4,123 AI recommendation data points across 10 SaaS categories for 8 weeks. Five changed their #1 brand, most after GPT-5.5.
- [Readable Is Not Recommended: What 8 #1 AI-Recommended Products Actually Have](https://decageo.ai/docs/Readable-Is-Not-Recommended.md): DecaGEO scanned 8 #1 AI-recommended products for three technical GEO setups. Only one had all three measured setups — suggesting these files are not prerequisites for #1 AI recommendation rankings.
- [AI CRM Rankings (Apr 26, 2026): HubSpot Holds #1, Microsoft Passes Zoho](https://decageo.ai/docs/ai-crm-rankings-apr-26-2026.md): This week's AI CRM ranking on ChatGPT: HubSpot #1 with a 100.0 DECA Score, Salesforce #2, Microsoft #3. See what AI recommends for CRM, refreshed weekly.
- [The Category-First GEO Playbook: 30/90-Day Strategies for Monopoly, Oligopoly, and Distributed Markets](https://decageo.ai/docs/category-first-geo-playbook.md): GEO strategy should start with category structure, not a universal checklist. This playbook maps Monopoly, Oligopoly, and Distributed AI recommendation markets into specific 30-day and 90-day action plans, success metrics, and common mistakes.
- [CRM AI Rankings Show Four GEO Paths in One Week](https://decageo.ai/docs/crm-four-geo-paths.md): DecaGEO scanned all 34 CRM products for llms.txt. Close surged 6 spots with competitive positioning in its file. Capsule surged 5 without one. Daylite entered the chart with 15K words of docs. The #1 product has none.
- [Contact Us](https://decageo.ai/docs/deca/support-hub/contact.md): Get in touch with the DecaGEO team. We'd love to hear from you.
- [Legal](https://decageo.ai/docs/deca/support-hub/legal.md)
- [Plans & Pricing](https://decageo.ai/docs/deca/support-hub/plans-and-pricing.md): DecaGEO is currently free during our launch period. Explore AI brand visibility rankings at no cost.
- [Changelog](https://decageo.ai/docs/deca/whats-new/changelog.md): Latest updates and releases from DecaGEO.
- [GEO Opportunity Depends on Category Openness: 4 AI Recommendation Markets Are Still Open, 6 Are Already Closed](https://decageo.ai/docs/four-categories-window-still-open.md): AI recommendation windows are closing at different speeds by category. We classify 10 software categories using Gini coefficients and AI Visibility Rates to show where GEO opportunity is still open — and where standard GEO playbooks now face structural limits.
- [Target Prompt Reverse-Engineering: Beyond Keywords for GEO](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/advanced-tactics/geo-prompt-reverse-engineering.md): Stop optimizing for keywords. Learn to reverse-engineer user prompts and master the 'Query Fan-Out' mechanism to capture traffic from ChatGPT and Gemini.
- [Medium vs. Website: The GEO Distribution Strategy for 2025](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/advanced-tactics/geo-publishing-strategy-hub-spoke.md): Stop giving away your authority. Discover how to build a content ecosystem that prioritizes your domain as the Source of Truth while using platforms to amplify AI signals.
- [The Context Lock Protocol: How to Force AI Citations](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/fundamentals/geo-context-lock-protocol.md): Stop AI hallucinations. Learn the Context Lock Protocol—a 4-step formatting strategy (BLUF, Semantic HTML) to ensure ChatGPT and Perplexity quote your content accurately.
- [Entity Optimization: The Foundation of GEO Strategy](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/fundamentals/geo-entity-optimization.md): Move beyond keywords. Learn how Entity Optimization helps AI models recognize your brand as a distinct authority using the Knowledge Graph and JSON-LD.
- [Why Your Domain Must Be the Source of Truth: Technical Authority in GEO](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/fundamentals/geo-technical-authority-source-of-truth.md): AI cites sources it trusts. Learn why owning your domain is critical for Generative Engine Optimization and how to establish technical authority using Schema and Entity validation.
- [The 3 Pillars of GEO: Trust, Context, and Structure](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/fundamentals/the-3-pillars-of-GEO.md): A deep dive into the core methodology of Generative Engine Optimization. Learn how to optimize for Trust (Authority), Context (Semantics), and Structure (Machine Readability).
- [What is GEO? The Definitive Guide](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/fundamentals/what-is-geo.md): What is GEO? It’s your second chance at search visibility. Move beyond backlinks and domain authority learn how to build Answer-Ready Content that AI engines prefer and quote
- [Getting Started with GEO: 5 Steps to AI Search Visibility](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/getting-started-with-GEO.md): Ready to rank in AI search? Follow this 5-step GEO(Generative Engine Optimization) roadmap. From content audit to entity optimization, learn exactly how to make your brand visible on Perplexity and Google SGE.
- [Header Restructuring: Converting Creative Headers into Question-Based H2s for AI Parsing](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/header-restructuring-guide-ai-search.md): Learn how to convert creative, abstract headers into clear, question-based H2s to boost AI parsing, secure Featured Snippets, and align with Generative Engine Optimization (GEO) principles.
- [List & Table Formatting: AI-Friendly Content with DECA GEO](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/list-table-formatting-ai-geo-deca.md): Transform unstructured text into AI-friendly lists & tables. Learn GEO best practices with DECA to optimize content for Featured Snippets, AI answers, and machine readability.
- [The OSMU Workflow: Repurposing Content for AI Visibility](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/osmu-workflow-ai-visibility.md): Transform one asset into five AI-ready signals. Learn the One Source Multi Use strategy that leverages structured data, tables, and Q&A formats to dominate Generative Engine results.
- [Schema Markup Injection: How to Add Speakable, FAQ, and Article Schema to Legacy Content](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/schema-markup-injection-geo.md): Learn how to inject Article, FAQPage, and Speakable schema markup into existing content to boost AI visibility, secure direct answers, and optimize for voice search without rewriting.
- [The Spoke Strategy: Amplifying Authority via Medium & LinkedIn](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/spoke-strategy-medium-linkedin.md): Don't just copy-paste. Learn how to syndicate content on Medium and LinkedIn using canonical tags to boost your domain authority without SEO penalties.
- [The Summary Box Tactic: Optimize for AI Direct Answers & LLM Citation](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/summary-box-tactic-ai-optimization.md): Learn how to craft effective summary boxes using details tags and FAQPage schema to boost AI search visibility, secure direct answers, and enhance LLM citation for your content. A practical guide for Generative Engine Optimization.
- [The Technical Retrofit: How to Structure Legacy Content for AI Search](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/getting-started/technical-retrofit-ai-parsing.md): Learn the 3-step technical retrofit process to make legacy content AI-readable. Master semantic HTML, summary boxes, and schema markup for GEO(Generative Engine Optimization).
- [Why Open Rankings Matter](https://decageo.ai/docs/geo-playbook/geo-cheat-keys/tools-compare-and-stack/why-open-rankings-matter.md): Private dashboards track your brand. Open Rankings show what AI actually sees — the full category. Here's why that difference changes everything for GEO.
- [ How Tally.so Gained 9.6% Traffic from ChatGPT](https://decageo.ai/docs/geo-playbook/leaked-playbooks/industry-secrets/tally-geo-case-study-chatgpt-traffic.md): Discover how Tally.so reached $4M ARR and a 9.6% traffic share via ChatGPT. Learn the 3-step Generative Engine Optimization (GEO) strategy to replicate their success.
- [2026 GEO Market Radar: A Strategic Roadmap for Digital Leaders | DECA](https://decageo.ai/docs/geo-playbook/market-radar/2026-trends/2026-GEO-Market-Radar.md): Go beyond SEO to GEO (Generative Engine Optimization). Discover 'Share of Model' the new success metric for the AI search era and a 3-step execution strategy for enterprises.
- [Why Google Loves Reddit & How Brands Can Win](https://decageo.ai/docs/geo-playbook/market-radar/industry-analysis/reddit-content-void-strategy.md): Reddit ranks because your content is missing. Learn the Content Void theory and how to reclaim your brand authority using DECA's Target Prompt strategy.
- [DecaGEO — Open Rankings for AI Search Brand Visibility](https://decageo.ai/docs/geo-playbook/overview.md): DecaGEO publishes open category rankings for brand visibility in AI search and provides actionable insights to improve those rankings. Try free.
- [GEO Tools AI Visibility Nearly Doubled: 26% to 44% in 8 Weeks](https://decageo.ai/docs/geo-tools-ai-visibility-rate.md): GEO Tools had the highest AI Visibility Rate among 10 tracked SaaS categories at 43.5%, with 3 #1 brand changes and 342 new-entry events over 8 weeks.
- [Influencer Marketing GEO Patterns: What Top AI-Recommended Brands Skip](https://decageo.ai/docs/nfluencer-marketing-geo-patterns.md): 8 weeks of DecaGEO data show how Influencer Marketing AI recommendations concentrated, which visible GEO assets top brands have, and which common tactics are mostly absent.
- [Profound Drops 66.7% in AI Mentions (Apr 26)](https://decageo.ai/docs/profound-drops-ai-mentions-geo-apr-26.md): Profound just lost 66.7% of its AI mentions in 7 days. Semrush jumped 6 ranks to #1. See this week's GEO ranking and why AI visibility shifts weekly.
- [Project Management AI Rankings: All 5 Top Brands Have llms.txt — But #1 Changed 3 Times](https://decageo.ai/docs/project-management-ai-rankings-llms-txt.md): DecaGEO tracked 3 different #1 AI-recommended Project Management brands in 3 weeks and audited the GEO assets behind the top 5 brands, from llms.txt to MCP-related AI agent documentation.
- [GEO Strategy Depends on Category Structure: Why the Same Playbook Produces 2× Different Results](https://decageo.ai/docs/same-geo-playbook-different-results.md): The same GEO checklist can produce very different results depending on category structure. We compare CRM and Email Marketing to show how AI Visibility Rate, Gini coefficient, and DECA concentration determine GEO ROI.
- [SEO Tools Built Empires on Google. GEO Tools Are Building Theirs Inside AI](https://decageo.ai/docs/seo-vs-geo.md): We compared AI recommendation data for SEO (57 brands) and GEO (147 brands). Only 15 brands appear in both — an overlap of 26.3%. 70% of GEO's top 20 are brands that don't exist in SEO rankings. This cross-category analysis reveals how AI draws boundaries between related software categories
- [SEO Top 5: 1 of 5 Has llms.txt. GEO Top 5: 4 of 5.](https://decageo.ai/docs/seo-vs-geo-top5-llms-txt.md): DecaGEO scanned the SEO and GEO Top 5 AI-recommended products for llms.txt. Semrush and Ahrefs don't have it. Otterly.AI and most GEO tools do. One brand appears in both Top 5s.
- [AI Visibility Has Two Filters: Why 91.6% of Software Brands Never Get Recommended](https://decageo.ai/docs/two-filters-one-invisible-wall.md): AI recommendations have two filters most brands don't know about. The first eliminates 91.6% of products. The second concentrates attention among the survivors. We measured both across 10 categories — and mapped which markets are locked and which are still open.

## OpenAPI Specs

- [openapi](https://decageo.ai/docs/openapi.json)