# Research & Analysis — CitedIndex > Source: https://citedindex.com/blog (curated, sourced) Data-driven reports on generative engine optimization and the tools that measure whether ChatGPT, Perplexity, Gemini and Google AI Overviews see (and cite) your brand. 57 reports. Each links to its answer-first markdown twin. - [Your AI Visibility Score Is a Probability](https://citedindex.com/blog/ai-visibility-score-is-a-probability.md) (2026-10-13) — Two studies show AI answers rarely repeat the same brands or sources, and what that means for reading AI visibility reports and choosing a tool. - [GEO and Content Tools for Agencies](https://citedindex.com/blog/geo-and-content-tools-for-agencies.md) (2026-10-13) — CiteMentor tracks client-brand citations, AEO Engine delivers managed GEO work, and BabyLoveGrowth automates content; compare coverage, limits and pricing. - [Can You Start GEO Tools Without Sales?](https://citedindex.com/blog/can-you-start-geo-tools-without-sales.md) (2026-10-12) — Most listed tools let buyers start online; agencies and some audit products require a conversation, while GEO Tool offers only a self-serve free check. - [AI Visibility Tools for Marketing Teams](https://citedindex.com/blog/ai-visibility-tools-for-marketing-teams.md) (2026-10-11) — Compare AI visibility tools by engine coverage, refresh cadence, reporting, workflow fit and price, and learn what to check before choosing. - [Which AI Visibility Tools Generate Content?](https://citedindex.com/blog/which-ai-visibility-tools-generate-content.md) (2026-10-10) — Learn which AI visibility tools draft articles or other materials, which offer only limited generation, and what that distinction means for buyers. - [AI Visibility Tools for Agencies: What to Check](https://citedindex.com/blog/ai-visibility-tools-for-agencies-what-to-check.md) (2026-10-09) — Compare AI visibility tools for agencies by engine coverage, client limits, reporting, optimization features, pricing, and trial terms. - [What This Week’s AI Visibility Tools Do](https://citedindex.com/blog/what-this-weeks-ai-visibility-tools-do.md) (2026-10-08) — A comparison of what each tool measures, how it turns findings into work, who it suits and what its published pricing says. - [Self-serve signup: a census of 122 listings](https://citedindex.com/blog/self-serve-census.md) (2026-10-07) — 80 of 122 listings answer yes for “Self-serve signup”. Counted from our own datasheet, with the query that reproduces every figure. - [ChatGPT: a census of 122 listings](https://citedindex.com/blog/chatgpt-census.md) (2026-10-05) — 116 of 122 listings answer yes for “ChatGPT”. Counted from our own datasheet, with the query that reproduces every figure. - [Competitor tracking: a census of 122 listings](https://citedindex.com/blog/competitor-tracking-census.md) (2026-10-03) — 109 of 122 listings answer yes for “Competitor tracking”. Counted from our own datasheet, with the query that reproduces every figure. - [Card required to start: a census of 121 listings](https://citedindex.com/blog/card-required-census.md) (2026-10-01) — 9 of 121 listings answer yes for “Card required to start”. Counted from our own datasheet, with the query that reproduces every figure. - [Prompts tracked: a census of 122 listings](https://citedindex.com/blog/prompt-volume-census.md) (2026-09-30) — 91 of 122 listings answer yes for “Prompts tracked”. Counted from our own datasheet, with the query that reproduces every figure. - [How often it checks: a census of 121 listings](https://citedindex.com/blog/tracking-cadence-census.md) (2026-09-29) — 94 of 121 listings answer yes for “How often it checks”. Counted from our own datasheet, with the query that reproduces every figure. - [Countries and languages: a census of 121 listings](https://citedindex.com/blog/geo-coverage-census.md) (2026-09-28) — 55 of 121 listings answer yes for “Countries and languages”. Counted from our own datasheet, with the query that reproduces every figure. - [Publishes to your site: a census of 122 listings](https://citedindex.com/blog/publishes-content-census.md) (2026-09-27) — 24 of 122 listings answer yes for “Publishes to your site”. Counted from our own datasheet, with the query that reproduces every figure. - [Sources it names: a census of 122 listings](https://citedindex.com/blog/citation-visibility-census.md) (2026-09-26) — 102 of 122 listings answer yes for “Sources it names”. Counted from our own datasheet, with the query that reproduces every figure. - [Tells you what to change: a census of 122 listings](https://citedindex.com/blog/content-optimization-census.md) (2026-09-25) — 101 of 122 listings answer yes for “Tells you what to change”. Counted from our own datasheet, with the query that reproduces every figure. - [Perplexity: a census of 122 listings](https://citedindex.com/blog/perplexity-census.md) (2026-09-24) — 94 of 122 listings answer yes for “Perplexity”. Counted from our own datasheet, with the query that reproduces every figure. - [Meta AI: a census of 122 listings](https://citedindex.com/blog/meta-ai-census.md) (2026-09-23) — 8 of 122 listings answer yes for “Meta AI”. Counted from our own datasheet, with the query that reproduces every figure. - [Engines tracked: a census of 122 listings](https://citedindex.com/blog/engines-tracked-census.md) (2026-09-22) — 86 of 122 listings answer yes for “Engines tracked”. Counted from our own datasheet, with the query that reproduces every figure. - [Gemini: a census of 122 listings](https://citedindex.com/blog/gemini-census.md) (2026-09-21) — 88 of 122 listings answer yes for “Gemini”. Counted from our own datasheet, with the query that reproduces every figure. - [Optimises existing content: a census of 122 listings](https://citedindex.com/blog/optimises-content-census.md) (2026-09-20) — 89 of 122 listings answer yes for “Optimises existing content”. Counted from our own datasheet, with the query that reproduces every figure. - [BI export: a census of 122 listings](https://citedindex.com/blog/bi-export-census.md) (2026-09-19) — 12 of 122 listings answer yes for “BI export”. Counted from our own datasheet, with the query that reproduces every figure. - [Google AI Overviews: a census of 122 listings](https://citedindex.com/blog/ai-overviews-census.md) (2026-09-17) — 80 of 122 listings answer yes for “Google AI Overviews”. Counted from our own datasheet, with the query that reproduces every figure. - [How AI describes you: a census of 122 listings](https://citedindex.com/blog/brand-perception-census.md) (2026-09-16) — 64 of 122 listings answer yes for “How AI describes you”. Counted from our own datasheet, with the query that reproduces every figure. - [DeepSeek: a census of 122 listings](https://citedindex.com/blog/deepseek-census.md) (2026-09-15) — 14 of 122 listings answer yes for “DeepSeek”. Counted from our own datasheet, with the query that reproduces every figure. - [API access: a census of 122 listings](https://citedindex.com/blog/api-access-census.md) (2026-09-14) — 27 of 122 listings answer yes for “API access”. Counted from our own datasheet, with the query that reproduces every figure. - [Projects or brands: a census of 122 listings](https://citedindex.com/blog/projects-census.md) (2026-09-13) — 52 of 122 listings answer yes for “Projects or brands”. Counted from our own datasheet, with the query that reproduces every figure. - [Technical AEO fixes: a census of 122 listings](https://citedindex.com/blog/technical-aeo-census.md) (2026-09-12) — 68 of 122 listings answer yes for “Technical AEO fixes”. Counted from our own datasheet, with the query that reproduces every figure. - [Grok: a census of 122 listings](https://citedindex.com/blog/grok-census.md) (2026-09-11) — 28 of 122 listings answer yes for “Grok”. Counted from our own datasheet, with the query that reproduces every figure. - [Generates content: a census of 122 listings](https://citedindex.com/blog/generates-content-census.md) (2026-09-10) — 63 of 122 listings answer yes for “Generates content”. Counted from our own datasheet, with the query that reproduces every figure. - [MCP server: a census of 122 listings](https://citedindex.com/blog/mcp-access-census.md) (2026-09-09) — 44 of 122 listings answer yes for “MCP server”. Counted from our own datasheet, with the query that reproduces every figure. - [Claude models: a census of 122 listings](https://citedindex.com/blog/claude-census.md) (2026-09-08) — 56 of 122 listings answer yes for “Claude models”. Counted from our own datasheet, with the query that reproduces every figure. - [Google AI Mode: a census of 122 listings](https://citedindex.com/blog/ai-mode-census.md) (2026-09-07) — 48 of 122 listings answer yes for “Google AI Mode”. Counted from our own datasheet, with the query that reproduces every figure. - [AI crawler analytics: a census of 122 listings](https://citedindex.com/blog/crawler-analytics-census.md) (2026-09-06) — 22 of 122 listings answer yes for “AI crawler analytics”. Counted from our own datasheet, with the query that reproduces every figure. - [Done-for-you service: a census of 122 listings](https://citedindex.com/blog/agency-service-census.md) (2026-09-05) — 39 of 122 listings answer yes for “Done-for-you service”. Counted from our own datasheet, with the query that reproduces every figure. - [Microsoft Copilot: a census of 122 listings](https://citedindex.com/blog/copilot-census.md) (2026-09-05) — 35 of 122 listings answer yes for “Microsoft Copilot”. Counted from our own datasheet, with the query that reproduces every figure. - [Accuracy disclosure: a census of 122 listings](https://citedindex.com/blog/hallucination-disclosure-census.md) (2026-09-05) — 23 of 122 listings answer yes for “Accuracy disclosure”. Counted from our own datasheet, with the query that reproduces every figure. - [Which AI-Visibility Tools Have an API, and What Plan Carries It?](https://citedindex.com/blog/api-access-census-ai-visibility-tools-2026.md) (2026-08-19) — API access versus plan entitlement: a corrected August 2026 report, with unreproduced totals withdrawn and sourced REST, MCP and self-hosting distinctions. - [AI Visibility and GEO: The 22 August 2026 Six-Engine Shortlist](https://citedindex.com/blog/leading-ai-visibility-and-geo-software-2026.md) (2026-08-16) — The dated 79-tool edition recorded 15 in both categories with six engine tags. Historical taxonomy recovered; trials and prices are not current offers. - [AI-Visibility Billing Census: Corrected Historical Findings](https://citedindex.com/blog/ai-visibility-tools-billing-model-census-2026.md) (2026-08-13) — Corrections to the August 2026 billing census: signup credits do not establish ongoing free access. Historical totals withdrawn, not remeasured. - [Who Published a Price? The 13 August 2026 CitedIndex Study](https://citedindex.com/blog/price-transparency-ai-visibility-tools-2026.md) (2026-08-13) — Historical pricing records: 59 of 68 readable software records include a currency price; 6 of 11 readable service records use quote pricing. Dated 13 August 2026. - [Which AI-Visibility Tools Show Their Work? A Methodology Census](https://citedindex.com/blog/methodology-transparency-ai-visibility-tools-2026.md) (2026-08-07) — A dated 74-tool transparency review: six had inspectable supporting material, not independently validated accuracy. Corrected evidence scope and sampling units. - [Free-Access Census: Corrections to the August 2026 Findings](https://citedindex.com/blog/free-tier-vs-free-trial-ai-visibility-tools-2026.md) (2026-08-05) — The August 2026 free-access census is corrected, not remeasured: recurring allowances, signup grants and plan-specific trials must be distinguished. - [Prompt Volume, Seats or Credits: How AI-Visibility Tools Price](https://citedindex.com/blog/how-ai-visibility-tools-actually-price-2026.md) (2026-08-05) — Compare configured prompts, answer runs, bundled limits, credits and self-hosting costs using dated vendor examples, not monthly sticker prices alone. - [How to Choose an AI Visibility Tool: 7 Things to Check](https://citedindex.com/blog/how-to-choose-an-ai-visibility-tool-2026.md) (2026-07-31) — Seven checks for choosing an AI-visibility tool, with explicitly dated August 2026 census findings and practical questions about engines, evidence, access and cost. - [Which AI Engines Do AI-Visibility Tools Track? The 2026 Census](https://citedindex.com/blog/engine-coverage-census-ai-visibility-tools-2026.md) (2026-07-28) — Recovered August 2026 engine-tag counts across 85 directory listings, with explicit limits on what tags establish about live monitoring and plan access. - [SOC 2 Type II and SSO in AI-Visibility Tools: Included or Gated?](https://citedindex.com/blog/enterprise-security-ai-visibility-tools-2026.md) (2026-07-25) — Corrections to the archived security census: SOC 2 report scope, plan-specific SSO and account support are different findings; unsupported totals are withdrawn. - [Which AI-Visibility Tools Can Your Own AI Agent Actually Query?](https://citedindex.com/blog/mcp-server-support-ai-visibility-tools-2026.md) (2026-07-24) — A corrected MCP access report: historical totals withdrawn, vendor research preserved, and API, server, tier and read-only distinctions explained. - [First Page Sage vs iPullRank vs Omniscient Digital](https://citedindex.com/blog/first-page-sage-vs-ipullrank-vs-omniscient-digital.md) (2026-07-23) — First Page Sage, iPullRank and Omniscient Digital compared by published scope, pricing evidence and questions to ask before hiring a GEO agency. - [GEO Agency or Software? How to Choose in 2026](https://citedindex.com/blog/geo-agency-or-software-2026.md) (2026-07-21) — Choose monitoring software, software-assisted execution or a GEO agency by ownership, deliverables, total commitment and evidence, without assuming guaranteed results. - [AI Search Statistics 2026: The Data Behind the Shift](https://citedindex.com/blog/geo-ai-search-statistics-2026.md) (2026-07-21) — Dated AI-search studies and enterprise survey findings, with corrected source attribution, study windows, denominators and limits on causal claims. - [Who's Backing Your GEO Stack? The 2025-2026 Money Wave](https://citedindex.com/blog/geo-tools-capital-and-consolidation-wave-2025-2026.md) (2026-07-21) — Ten dated GEO financing and acquisition events through July 2026, separating disclosed terms and company plans from unsupported pricing and survival predictions. - [Vendor Record Discrepancies: What the July Archive Can Prove](https://citedindex.com/blog/vendor-claims-that-changed-since-we-last-checked.md) (2026-07-21) — A correction to our July record: ten reported price and feature discrepancies, the missing before-and-after evidence, and checks buyers can repeat. - [Peec vs Profound vs Scrunch vs Otterly: How to Choose](https://citedindex.com/blog/choosing-an-ai-visibility-platform-2026.md) (2026-07-20) — Peec, Profound, Scrunch and Otterly compared by engine coverage, prompt capacity, integrations and billing commitments, with dated public-source examples. - [How AI answer engines cite sources: what the studies show](https://citedindex.com/blog/how-ai-answer-engines-cite-sources.md) (2026-07-16) — What Profound, Otterly and Ahrefs citation studies actually measure, where their samples and denominators differ, and what they do not prove about AI source selection. - [The 20 August 2026 GEO Tool Landscape: Historical Tags, Pricing and Limits](https://citedindex.com/blog/state-of-geo-ai-visibility-tools-2026.md) (2026-07-12) — A preserved 79-tool directory edition with recovered historical engine tags, corrected trial range, and explicit pricing, API and evidence limits.