# Resources > Guides, research, and playbooks on AI visibility, GEO (Generative Engine Optimization), and search visibility strategy. - [For One India Beauty Buyer, AI Engines Agree on the Source Before the Brand](https://www.zumihq.com/resources/india-beauty-cross-engine-agreement-gap): Across 54 India beauty search queries, 7 of 8 buyer segments show AI engines agreeing more on brands than sources. One segment inverts it. (Research, 2026-08-25) - [The dark funnel in AI search, measured](https://www.zumihq.com/resources/dark-funnel-ai-search): Across 77 tracked answers, Google AI Overviews used the term dark funnel in 8 of its 25. Gemini used it twice, AI Mode once. Read the research. (Research, 2026-08-23) - [Gemini, AI Overviews, and AI Mode cite differently](https://www.zumihq.com/resources/gemini-ai-overviews-ai-mode-citation-differences): Zumi asked one question across Gemini, AI Overviews, and AI Mode for 19 days. The three engines cited 362 domains and shared 9. Read the study. (Research, 2026-08-17) - [Zumi vs Profound for AI Visibility Tracking](https://www.zumihq.com/resources/zumi-vs-profound): A buyer's comparison of Zumi and Profound: engine coverage, recommendations, agency support, and how each measures AI visibility. Read the guide. (Strategy, 2026-08-15) - [Profound Alternatives for AI Search Monitoring](https://www.zumihq.com/resources/profound-alternatives): Alternatives to Profound split by what already tracks AI answers versus what's built only for it. Where Zumi fits in that field. Read the guide. (Guide, 2026-08-10) - [Semrush AI Visibility Toolkit vs. Zumi](https://www.zumihq.com/resources/semrush-ai-overview-vs-ai-visibility-platform): Semrush's AI Visibility Toolkit now spans several AI engines inside an SEO suite. See where a specialist platform still goes deeper. Read the guide. (Strategy, 2026-08-09) - [Zumi vs Brandwatch for AI Visibility Tracking](https://www.zumihq.com/resources/zumi-vs-brandwatch): Brandwatch listens across social and news. Zumi tracks AI visibility by fixed prompt across nine engines. How the two approaches differ. Read the guide. (Strategy, 2026-08-09) - [GEO Specialist or SEO Suite Add-On?](https://www.zumihq.com/resources/geo-specialist-vs-seo-suite): Semrush and HubSpot priced AI visibility into their suites this year. Zumi prices engine coverage directly. Compare what each one tracks. (Strategy, 2026-07-17) - [Best AI Visibility Tools for Brands in 2026](https://www.zumihq.com/resources/best-ai-visibility-tools-2026): The 2026 buyer's guide to AI visibility tools, comparing how platforms handle engine coverage, pricing transparency, and agency fit. Read the guide. (Guide, 2026-07-16) - [AI Search Intelligence metrics that matter](https://www.zumihq.com/resources/geo-metrics-beyond-mention-rate): Four AI visibility signals answer four different questions. Learn how to read each one without hiding the result in a composite. Read the guide. (Guide, 2026-06-16) - [How to write content that AI engines cite](https://www.zumihq.com/resources/how-to-write-content-ai-engines-cite): Writing for AI citation differs from writing for SEO. Research shows what gets extracted and recommended, and what does not. Read the guide. (Playbook, 2026-06-16) - [Branded search in the AI era: the brand narrative](https://www.zumihq.com/resources/branded-search-in-the-ai-era): Branded search was the safest territory in digital marketing. AI answers have changed that, and most brands have not noticed. Read the guide. (Strategy, 2026-06-15) - [Why AI Engines Favor Certain Brands](https://www.zumihq.com/resources/why-ai-engines-favor-certain-brands): What the research shows about why certain brands are consistently recommended in AI answers, and how to become one of them. Read the guide. (Strategy, 2026-06-15) - [How to audit competitor AI visibility](https://www.zumihq.com/resources/competitor-ai-visibility-audit): A practical, repeatable method for mapping competitive AI visibility across the major AI engines before committing to any tooling. Read the guide. (Playbook, 2026-06-14) - [GEO for SaaS: The category ownership playbook](https://www.zumihq.com/resources/geo-for-saas): How SaaS companies establish and defend category ownership in AI answers, and why challengers can win it faster than expected. Read the guide. (Playbook, 2026-06-14) - [How B2B Buyers Use AI When Researching Vendors](https://www.zumihq.com/resources/b2b-ai-buyer-journey): The verified research on B2B AI adoption in purchasing, and what it means for how and when brands need to appear in AI answers. Read the research. (Research, 2026-06-13) - [Entity Optimization: The AI Visibility Foundation](https://www.zumihq.com/resources/entity-optimization-for-ai): AI engines are entity-first systems. Before recommending a brand, an engine needs to recognize it as a coherent, well-attested entity. Read the guide. (Playbook, 2026-06-13) - [GEO vs. SEO: Differences and How to Allocate](https://www.zumihq.com/resources/geo-vs-seo): GEO and SEO reward different signals, not different degrees of the same one. What diverges, what carries over, and how to allocate budget. (Guide, 2026-06-12) - [How Perplexity decides which sources to cite](https://www.zumihq.com/resources/how-perplexity-cites-sources): Perplexity runs the strictest quality gate of any major AI engine. Here is what determines whether a brand's content makes the cut. Read the guide. (Research, 2026-06-12) - [How to get a brand mentioned in ChatGPT answers](https://www.zumihq.com/resources/how-to-appear-in-chatgpt-answers): The signals ChatGPT uses to decide which brands to recommend, and the four levers that produce reliable, measurable movement in AI answers. (Playbook, 2026-06-12) - [How to baseline AI visibility before buying a tool](https://www.zumihq.com/resources/baseline-ai-visibility): An AI visibility baseline needs fixed questions, declared scope, raw answers, and separate signals. Build a defensible first read. Use the playbook. (Playbook, 2026-06-11) - [State of AI search, mid-2026: the verified data](https://www.zumihq.com/resources/state-of-ai-search-2026): Six verified numbers describe AI search in mid-2026. Adoption is settled, B2B buyers lead, and visibility has decoupled from traffic. (Research, 2026-06-11) - [AI visibility is not the product](https://www.zumihq.com/resources/ai-visibility-is-not-the-product): Measurement-only GEO tools stall the moment the number arrives. The durable value is the loop: diagnose, act, then see it improve. (Strategy, 2026-06-04) - [What is Generative Engine Optimization (GEO)?](https://www.zumihq.com/resources/what-is-geo): A complete introduction to Generative Engine Optimization: what GEO is, why it matters, and how it differs from traditional SEO. Read the guide. (Guide, 2026-03-01) - [How AI engines decide what brands to mention](https://www.zumihq.com/resources/how-ai-engines-rank-brands): What the published research actually says about which signals drive brand citations in ChatGPT, Gemini, Perplexity, and Claude. Read the research. (Research, 2026-02-14) - [The CMO guide to AI Search Intelligence](https://www.zumihq.com/resources/cmo-guide-to-ai-visibility): A 90-day operating model helps CMOs measure AI discovery, assign action, and report clear limits without inventing causal ROI. Read the guide. (Strategy, 2026-02-01) - [5 content strategies that improve AI citation rates](https://www.zumihq.com/resources/5-content-strategies): Practical, tested tactics for improving how often AI engines cite a brand's content when answering relevant queries. Read the guide. (Playbook, 2026-01-18) - [AI engine comparison: which drives purchase intent](https://www.zumihq.com/resources/ai-engine-comparison): What public market-share and conversion data says about which AI engines matter most for which buyer types, and how to prioritize. Read the guide. (Research, 2026-01-05) - [Agency guide to GEO: AI visibility at scale](https://www.zumihq.com/resources/agency-guide-to-geo): How marketing agencies can build GEO into their service offering and deliver measurable AI visibility results at scale. Read the guide. (Guide, 2025-12-20)