# DecaGEO

> DecaGEO is the open, weekly ranking of AI brand visibility, with actionable insights to improve how ChatGPT recommends your brand. Free to explore, no sign-up.

- [AI Ranking Movers — Week of September 27](https://decageo.ai/docs/ai-ranking-changes/2026-09-27.md): Two of ten ChatGPT category #1s changed hands in DecaGEO's week of September 27, 2026 data, both to a brand named in fewer responses than the one it passed.
- [AI Ranking Movers — Week of September 20](https://decageo.ai/docs/ai-ranking-changes/2026-09-20.md): Two of ten ChatGPT category leaders changed hands in the week of September 20, 2026, and DecaGEO's closest race, ties aside, came down to one prominence point.
- [AI Ranking Movers — Week of September 13](https://decageo.ai/docs/ai-ranking-changes/2026-09-13.md): ChatGPT's category leaders mostly held in the week of September 13, 2026, but eight of ten races tightened and CRM changed hands. DecaGEO's weekly AI recommendation index covers 10 software categories, with the prominence totals behind every gap.
- [AI Ranking Movers — Week of September 6](https://decageo.ai/docs/ai-ranking-changes/2026-09-06.md): Seventh week on GPT-5.6: one of ten category #1s changed hands, and the boards that were close a week earlier stopped being close. The median #1-to-#2 DECA gap more than doubled from 10.6 to 23.2 points, and single-digit races fell from four to one.
- [AI Ranking Movers — Week of August 30](https://decageo.ai/docs/ai-ranking-changes/2026-08-30.md): Sixth week on GPT-5.6: both of last week's top-line changes rolled back — Dynamics 365 Sales retook CRM after HubSpot's one-week reign, and the Help Desk tie resolved back to Zendesk Suite — while ClickUp logged only the second back-to-back #1 hold of the GPT-5.6 era. Klaviyo cut the Email mention-r…
- [AI Ranking Movers — Week of August 23](https://decageo.ai/docs/ai-ranking-changes/2026-08-23.md): Fifth week on GPT-5.6: HubSpot Sales Hub ended Dynamics 365 Sales' six-week CRM run, ClickUp retook Project Management for the board's fourth #1 change in five weeks, and Freshdesk pulled level with Zendesk Suite at the top of Help Desk. Semrush reset the closest race on the index, widening its GEO…
- [AI Ranking Movers — Week of August 16](https://decageo.ai/docs/ai-ranking-changes/2026-08-16.md): Fourth week on GPT-5.6: nine of ten #1s held while Project Management flipped again (Jira retook the top from ClickUp), and the GEO board reignited — Semrush's lead shrank from 20.2 to 2.0 points as GEO tools took four of the week's five biggest gains. Volatility stayed below 10% for a third straigh…
- [AI Ranking Movers — Week of August 9](https://decageo.ai/docs/ai-ranking-changes/2026-08-09.md): Third week on GPT-5.6: three category #1s changed hands in the quietest week we have tracked — ClickUp took Project Management from Jira, CreatorIQ retook Influencer Marketing from Aspire, and Semrush retook GEO after Profound's one-week reign. Klaviyo's Email challenge receded, the recommendation s…
- [AI Ranking Movers — Week of August 2](https://decageo.ai/docs/ai-ranking-changes/2026-08-02.md): Second week on GPT-5.6: Profound took GEO #1 from Semrush (a first in our tracking), the smaller recommendation set held (399 → 421, still below the GPT-5.4 range), all three new #1s from the model change defended their spots, and Klaviyo closed within 1 point of Email's top. Volatility hit a tracke…
- [AI Ranking Movers — Week of July 26](https://decageo.ai/docs/ai-ranking-changes/2026-07-26.md): First week on GPT-5.6: three of ten category #1s changed hands (the most in any tracked week), the recommendation set fell below its GPT-5.4 range (445 → 399, GEO 90 → 39), and general-purpose AI assistants surged in AI Writing. Every difference is read against the GPT-5.4 band, not claimed as cause…
- [AI Ranking Movers — Week of July 19](https://decageo.ai/docs/ai-ranking-changes/2026-07-19.md): This week in ChatGPT's software recommendations: HubSpot Marketing Hub took the Marketing Automation #1 from Braze, GEO rebounded from 74 to 90 brands with Scrunch AI up +47.2, and the CRM #1 stopped flipping — the final weekly report on GPT-5.4.
- [AI Ranking Movers — Week of July 12](https://decageo.ai/docs/ai-ranking-changes/2026-07-12.md): This week in ChatGPT's software recommendations: Marketing Automation's mid-tier surged together (Klaviyo +33.9) leaving Braze just 2 points ahead, GEO contracted from 99 to 74 brands, and the CRM #1 flipped for a fourth straight week.
- [AI Ranking Movers — Jul 5, 2026](https://decageo.ai/docs/ai-ranking-changes/2026-07-05.md): This week in ChatGPT's software recommendations: GEO reversed again, CRM's #1 flipped for a third straight week, and the tracked set pulled back.
- [AI Ranking Movers — Jun 28, 2026](https://decageo.ai/docs/ai-ranking-changes/2026-06-28.md): This week in ChatGPT's software recommendations: GEO surgers split, the CRM #1 changed hands again, and Marketing Automation flipped back to Braze.
- [AI Ranking Movers — Jun 21, 2026](https://decageo.ai/docs/ai-ranking-changes/2026-06-21.md): This week in ChatGPT's software recommendations: Profound surged +63.3 to reshape GEO's top, Zoho CRM took the CRM #1 spot, and last week's biggest gainer gave it back.
- [AI Ranking Movers — Week of June 14](https://decageo.ai/docs/ai-ranking-changes/2026-06-14.md): This week in ChatGPT's software recommendations: Agentforce Marketing surged +22.6, HubSpot Sales Hub climbed in CRM, and the tracked set widened to 473 brands.
- [AI Ranking Movers — Week of June 7](https://decageo.ai/docs/ai-ranking-changes/2026-06-07.md): This week in AI rankings: HubSpot AEO surged 43 spots in GEO, Claude entered the AI Writing Top 10, and local-SEO tools climbed. See every category's risers, drops, and new entries.
- [BrightEdge vs Ahrefs: Which Does ChatGPT Recommend More? (2026)](https://decageo.ai/docs/best-tools/brightedge-vs-ahrefs.md): ChatGPT recommends Ahrefs far more than BrightEdge for SEO — #2 vs #7, 54% vs 16% of responses. See the DECA data, six-week trend, and why.
- [Midjourney vs Adobe Firefly: Which Does ChatGPT Recommend More? (2026)](https://decageo.ai/docs/best-tools/midjourney-vs-adobe-firefly.md): Midjourney is the more famous AI image generator — but ChatGPT recommends Adobe Firefly. Firefly ranks #1 (DECA 100) to Midjourney's #2 (58). Inside DecaGEO's data.
- [Semrush vs Ahrefs: Which Does ChatGPT Recommend More? (2026)](https://decageo.ai/docs/best-tools/semrush-vs-ahrefs.md): ChatGPT recommends Semrush far more than Ahrefs for SEO — #1 vs #2, DECA 100 vs 49.5. See the six-week data and why Semrush leads on both frequency and position.
- [HubSpot Sales Hub vs Agentforce Sales: Which CRM Does ChatGPT Recommend More? (2026)](https://decageo.ai/docs/best-tools/hubspot-vs-salesforce.md): The lead just flipped: as of July 5, 2026, ChatGPT ranks Agentforce Sales (#3) just ahead of HubSpot Sales Hub (#4) in CRM. See the DECA data and why.
- [Asana vs monday.com: Which Does ChatGPT Recommend More for Project Management? (2026)](https://decageo.ai/docs/best-tools/asana-vs-monday.md): ChatGPT ranks monday.com #1, ClickUp #2, Asana #3 for project management — yet Asana is mentioned more often. Inside DecaGEO's 3-way AI recommendation race.
- [ClickUp vs Asana: Which Project Management Tool Does ChatGPT Recommend More? (2026)](https://decageo.ai/docs/best-tools/clickup-vs-asana.md): ChatGPT ranks ClickUp #2 and Asana #3 for project management — ClickUp leads most metrics, but Asana edges the head-to-head. Inside DecaGEO's 3-way race.
- [Klaviyo vs Mailchimp: Which Email Marketing Tool Does ChatGPT Recommend More? (2026)](https://decageo.ai/docs/best-tools/klaviyo-vs-mailchimp.md): ChatGPT mentions Klaviyo and Mailchimp equally, but ranks Klaviyo far higher — Mailchimp is never named #1. Inside DecaGEO's email marketing data.
- [Zendesk vs Intercom: Which Help Desk Tool Does ChatGPT Recommend More? (2026)](https://decageo.ai/docs/best-tools/zendesk-vs-intercom.md): ChatGPT recommends Zendesk far more than Intercom for help desk — 82% vs 32% of responses. See the DECA data, six-week trend, and what it means for your brand.
- [Semrush vs BrightEdge: Which Does ChatGPT Recommend More? (2026)](https://decageo.ai/docs/best-tools/semrush-vs-brightedge.md): ChatGPT recommends Semrush far more than BrightEdge for SEO — #1 vs #7, named 77% vs 16% of the time. See the six-week DECA data and why.
- [Reddit Was in the Search Results of ChatGPT Answers We Track. None Cited It.](https://decageo.ai/docs/chatgpt-api-never-cited-reddit.md): Judge Reddit work by recommendations, not citation share. Reddit was in the search results of 31.5% of DecaGEO's ChatGPT software answers. None cited it.
- [What ChatGPT Does After It Opens Your Pricing Page](https://decageo.ai/docs/when-models-open-your-pricing-page.md): Does ChatGPT read your pricing page? In DecaGEO's retrieval logs it opened 416 pages in nine weeks, 43% of them pricing pages, and searched inside 47 of them for a price, a plan limit or a plan name. What it opens and what it cites turn out to be different pages.
- [When Everyone's GEO Looks the Same, What Decides Who AI Recommends?](https://decageo.ai/docs/what-decides-who-ai-recommends.md): Two new research papers predict that repeated GEO optimization reshapes content ecosystems and that the optimal strategy shifts as competitors adopt it. We tested both predictions against 14 weeks of on-page audit data across two boards: pattern adoption converged on both, but the ranking consequenc…
- [Is GEO Worth It? A Full-Pipeline Test Split the Answer in Two](https://decageo.ai/docs/is-geo-worth-it.md): KDD 2026 research ran 10 popular GEO tactics through a full AI search pipeline. Body-text edits cut retrieval visibility 9% on average, while structure edits raised it 22%. A separate August 2026 study reports detecting GEO content at an F1 score of 0.944. What holds up, and what to build instead.
- [AI Is Answering Instead of Linking. Which Engine Should Your Brand Focus On First?](https://decageo.ai/docs/which-ai-to-optimize-for-first.md): People now read AI answers instead of clicking links, and those answers are splitting across ChatGPT, Gemini, Claude, and Perplexity. With limited resources, here's which engine to optimize for first in 2026, and why.
- [Which Pages ChatGPT Actually Cites and Why](https://decageo.ai/docs/which-pages-chatgpt-cites.md): Among the vendor pages ChatGPT retrieves, pricing pages get cited 34.5% of the time and blog posts 6.1%. The gap is decided on the search results page, where 99.7% of citations match a result-list URL and only 1.2% come from pages the model opened. What that suggests building, from DecaGEO's retriev…
- [ChatGPT's site: Searches Jumped From 38% to 90%. Its Citations Barely Moved.](https://decageo.ai/docs/gpt-5-6-vs-gpt-5-4-search-citation-behavior.md): GPT-5.6 scopes ~90% of its fan-out searches with the site: operator, up from 38% on GPT-5.4. Vendor pages still take ~95% of citations. What that means for optimizing your own site vs third-party mentions, from DecaGEO's weekly retrieval logs.
- [Do Semrush & Ahrefs Have llms.txt? SEO vs GEO Top 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; most GEO tools do. One brand ranks in both.
- [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.
- [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.
- [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 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.
- [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.
- [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.
- [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.
- [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.
- [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.
- [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.
- [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
- [Profound led GEO for 3 weeks. This week, it dropped to #4.](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.
- [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.
- [Did Your ChatGPT Ranking Drop Because of the Model? It Changed Once in 22 Weeks](https://decageo.ai/docs/rank-drop-me-or-the-model.md): Probably not the model. DecaGEO's ChatGPT model changed once in 22 weeks. In the other weeks, about 1 in 4 ranked brands fell 3+ places every week.
- [Best SEO Tools in 2026: Which Ones Does ChatGPT Actually Recommend?](https://decageo.ai/docs/best-tools/best-seo-tools.md): Ranked by what ChatGPT actually recommends — not opinion. The top 10 SEO tools by DECA Score, consistent across 10 weeks (May–Jul 2026).
- [Best CRM Software in 2026: Which Ones Does ChatGPT Actually Recommend?](https://decageo.ai/docs/best-tools/best-crm-software.md): The top CRM tools ranked by what ChatGPT actually recommends (DECA Score). Dynamics 365 Sales has held #1 for five straight weeks after a spring in which the top spot flipped 7 times in 10 weeks. Updated for the week of August 9, 2026.
- [Best Project Management Tools in 2026: Which Ones Does ChatGPT Actually Recommend?](https://decageo.ai/docs/best-tools/best-project-management-tools.md): The top project management tools ranked by what ChatGPT actually recommends (DECA Score). Jira retook #1 from ClickUp — the board's third #1 change in four weeks. Updated for the week of August 16, 2026.
- [Best Influencer Marketing Platforms in 2026: Which Ones Does ChatGPT Actually Recommend?](https://decageo.ai/docs/best-tools/best-influencer-marketing-platforms.md): The top influencer marketing platforms ranked by what ChatGPT actually recommends (DECA Score). CreatorIQ retook #1 from Aspire after a two-week interruption — the first #1 change in the category's tracking. Updated for the week of August 9, 2026.
- [Best Marketing Automation Tools in 2026: Which Ones Does ChatGPT Actually Recommend?](https://decageo.ai/docs/best-tools/best-marketing-automation-tools.md): The top marketing automation tools ranked by what ChatGPT actually recommends (DECA Score). Braze leads by 20 points while the #2–#6 pack sits within 8 — the sharpest split between leader and field. Updated for the week of August 9, 2026.
- [Best Email Marketing Tools in 2026: Which Ones Does ChatGPT Actually Recommend?](https://decageo.ai/docs/best-tools/best-email-marketing-tools.md): The top email marketing tools ranked by what ChatGPT actually recommends (DECA Score). Brevo has held #1 every tracked week since May 2026, and Klaviyo has climbed to a clear #2. Updated for the week of August 9, 2026.
- [What is DecaGEO?](https://decageo.ai/docs/what-is-decageo.md): DecaGEO is the open, weekly ranking of AI brand visibility, with actionable insights to improve how ChatGPT recommends your brand. Free to explore, no sign-up.
- [Find Your Brand's Rank](https://decageo.ai/docs/get-started/find-your-brands-rank.md): Search your brand and see where it stands in AI recommendations — one minute, no sign-up, and the data is already there.
- [How to Read the Ranking](https://decageo.ai/docs/get-started/how-to-read-the-ranking.md): What you're looking at on every DecaGEO screen — the chart's weekly signals, the three numbers on each row, and the evidence tabs behind every product.
- [Improve Your Rank](https://decageo.ai/docs/get-started/improve-your-rank.md): A four-step weekly loop from diagnosis to proof — where your AI visibility comes from, what AI actually says, what to change this week, and whether it worked.
- [Break Into the AI Ranking: Build AI Visibility From Zero](https://decageo.ai/docs/get-started/break-into-the-ranking.md): Your brand isn't on the chart yet. Here's how to build your AI visibility from zero, using the data of the brands that are. A beginner's GEO (Generative Engine Optimization) walkthrough: check how AI defines your category, learn the words it uses, compare your pages against the ones it cites, and ge…
- [What is the DECA Score?](https://decageo.ai/docs/metrics/deca-score.md): The DECA Score is a 0–100 measure of how strongly AI recommends a brand in its category — how often it's recommended, weighted by how highly it ranks.
- [What is Mention Rate?](https://decageo.ai/docs/metrics/mention-rate.md): Mention Rate is the percentage of AI responses that recommend a brand when asked about its category — the brand's AI share of voice.
- [How do Rank and weekly movement work?](https://decageo.ai/docs/metrics/rank-and-weekly-movement.md): Rank is a brand's chart position in its category, determined by DECA Score. Weekly movement shows how that position changed since last week.
- [What is Segment Position?](https://decageo.ai/docs/metrics/segment-position.md): Segment Position is a brand's rank when AI is asked by a specific type of buyer — defined by the buyer conditions of its category, such as business scale or use case.
- [AI Ranking Chart](https://decageo.ai/docs/using/ai-ranking-chart.md): The weekly ranking of every brand AI recommends in a category — free and open, with weekly signals, buyer-segment filters, and side-by-side comparison.
- [Product Details](https://decageo.ai/docs/using/product-details.md): The evidence behind a brand's position on the chart — AI visibility metrics, history, buyer segments, citations, on-page patterns, and the AI responses themselves.
- [Chart History](https://decageo.ai/docs/using/chart-history.md): Rank tracking for a brand's AI visibility, week over week — Rank, DECA Score, and Mention Rate, with the model version that measured each week.
- [Segment Position](https://decageo.ai/docs/using/segment-position-tab.md): Where a brand ranks in each buyer segment AI splits a category into, such as business scale, use case, and integration — with its mention rate in each.
- [Off-Page Citations](https://decageo.ai/docs/using/off-page-citations.md): Which reviews, forums, and media AI cites when it recommends a brand — citations by domain type, benchmarked against the category, and the sources missing you.
- [On-Page GEO Patterns](https://decageo.ai/docs/using/on-page-geo-patterns.md): What the pages AI actually cites have in common — the content, metadata, and technical on-page patterns of a brand's most-cited pages, with the HTML as evidence.
- [Prompt & AI Response](https://decageo.ai/docs/using/prompt-and-ai-response.md): The buyer questions behind a ranking and AI's answers — which brands AI recommended, in what order, in its own words.
- [Dashboard](https://decageo.ai/docs/using/dashboard.md): Each week's chart movement turned into recommendations — who broke into your category, what they did, and the prioritized moves to copy, with ready-to-run AI prompts.
- [GEO Guide](https://decageo.ai/docs/using/geo-guide.md): An AI visibility diagnostic in five screens — we check your robots.txt and one page the way a bot would, and you finish with a report of what to fix.
- [Compare](https://decageo.ai/docs/using/compare.md): Line up your brand against 2–4 competitors on the same weekly data — AI visibility, buyer segments, citations, and on-page patterns, tagged with what to act on.
- [Add Your Brand](https://decageo.ai/docs/using/add-your-brand.md): Your brand isn't in AI recommendations yet — what that means, why registering doesn't change the ranking, and how to hear the moment AI starts recommending it.
- [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.
- [What is GEO? The Definitive Guide to Generative Engine Optimization](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
- [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).
- [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.
- [Entity Optimization: Teaching AI Who You Are](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.
- [The Reddit Paradox: Why Google Loves It, But Your Brand Shouldn't Rely On It](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.
- [The State of GEO 2026: Market Radar & Strategic Roadmap](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.
- [How did Tally.so grow its traffic via ChatGPT? A Case Study in Generative Engine Optimization (GEO)](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.
- [GEO Strategy: Target Prompt Reverse-Engineering](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.
- [The GEO Distribution Matrix: Architecting Your Content for AI Citation](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 Structure Content for AI Citation](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.
- [Plans & Pricing](https://decageo.ai/docs/deca/support-hub/plans-and-pricing.md): What's free on DecaGEO, what Pro unlocks, and when Enterprise fits — exploring the weekly rankings costs nothing, with no sign-up.
- [Legal](https://decageo.ai/docs/deca/support-hub/legal.md): DecaGEO's Terms of Service and Privacy Policy — the authoritative, always-current versions.
- [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.
- [Changelog](https://decageo.ai/docs/deca/whats-new/changelog.md): Latest updates and releases from DecaGEO.

## OpenAPI Specs

- [openapi](/docs/openapi.json)


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