The DecaGEO Blog
Insights & Playbooks
Weekly data on the brands AI recommends — and the playbooks behind the rankings.
HubSpot Sales Hub vs Agentforce Sales: Which CRM Does ChatGPT Recommend More? (2026)
ChatGPT recommends HubSpot Sales Hub more often, but names Agentforce Sales (Salesforce's CRM) #1 more decisively. DecaGEO's CRM data on breadth vs conviction.
Zendesk vs Intercom: Which Help Desk Tool Does ChatGPT Recommend More? (2026)
ChatGPT recommends Zendesk far more than Intercom for help desk — 80% vs 28% of responses, and Intercom is never named #1. Inside DecaGEO's data.
Klaviyo vs Mailchimp: Which Email Marketing Tool Does ChatGPT Recommend More? (2026)
ChatGPT mentions Klaviyo and Mailchimp equally, but ranks Klaviyo far higher — Mailchimp is never named #1. Inside DecaGEO's email marketing data.
ClickUp vs Asana: Which Project Management Tool Does ChatGPT Recommend More? (2026)
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.
Asana vs monday.com: Which Does ChatGPT Recommend More for Project Management? (2026)
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.
SEO Tools Built Empires on Google. GEO Tools Are Building Theirs Inside AI
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
GEO Tools AI Visibility Nearly Doubled: 26% to 44% in 8 Weeks
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.
Do Semrush & Ahrefs Have llms.txt? SEO vs GEO Top 5
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.
GEO Strategy Depends on Category Structure: Why the Same Playbook Produces 2× Different Results
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.
Project Management AI Rankings: All 5 Top Brands Have llms.txt — But #1 Changed 3 Times
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.
Profound Drops 66.7% in AI Mentions (Apr 26)
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 Visibility Has Two Filters: Why 91.6% of Software Brands Never Get Recommended
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.
Semrush vs Ahrefs: Which Does ChatGPT Recommend More? (2026)
In DecaGEO's June 2026 data, ChatGPT recommends Semrush over Ahrefs for SEO — named #1 4× more often. See the data, the on-page and citation evidence, and what your brand can learn.
8 Weeks of AI Recommendations: 5 of 10 Markets Changed
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
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.
Influencer Marketing GEO Patterns: What Top AI-Recommended Brands Skip
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.
CRM AI Rankings Show Four GEO Paths in One Week
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.
AI CRM Rankings (Apr 26, 2026): HubSpot Holds #1, Microsoft Passes Zoho
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
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.
GEO Opportunity Depends on Category Openness: 4 AI Recommendation Markets Are Still Open, 6 Are Already Closed
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.
