A curated list of tools, first-party documentation, research and datasets for measuring and improving how brands and publishers appear in AI-generated search and answer experiences.
AI search increasingly combines traditional retrieval with synthesized answers and citations. This list focuses on observable practices: crawl and index controls, prompt-based visibility measurement, citations, referral traffic and content quality. No tool or tactic guarantees inclusion; behavior varies by engine, model, location and time.
This is deliberately a curated list, not an exhaustive directory. Entries need a live canonical URL, direct relevance to AI search and public evidence for the capability described. Listings are not endorsements, and paid placements, affiliate links and reciprocal listings are not accepted.
Last reviewed: September 2026. Maintainer disclosure: the maintainer is affiliated with LLM Pulse. Its entries follow the same inclusion, wording and ordering rules as every other project.
Contributions are welcome. Read the contribution guidelines before opening a pull request.
- What Is AI Search, GEO and AEO?
- First-Party Guidance and Measurement
- AI Visibility and Monitoring Platforms
- Free and Open-Source Tools
- Content Optimization and GEO Workflows
- Technical GEO
- AI Crawlers and Bots
- AI Search Engines and Assistants
- AI Traffic and Analytics
- APIs and MCP Servers
- API and MCP Benchmark
- Datasets and Benchmarks
- Research and Evidence
- Newsletters and Blogs
- Related Awesome Lists
- Contributing
- License
- AI Search: answering a query with a response generated by a large language model, often with citations, instead of only a ranked list of links.
- GEO (Generative Engine Optimization): improving content, entities and authority so generative engines can find, understand and cite them.
- AEO (Answer Engine Optimization): closely related work focused on becoming a useful answer to specific questions.
- AIO: an ambiguous abbreviation that may mean Google AI Overviews or AI optimization, depending on context.
Common measurements include:
- Visibility or Mention Rate: how often a brand appears across a defined prompt set.
- Share of Voice: a brand's mentions relative to a defined competitor set.
- Citations: source URLs linked from generated answers.
- Sentiment: how a brand is described.
- AI Traffic: visits and conversions referred by AI assistants.
Generated answers are non-deterministic. Reproducible reporting should record the engine and model, locale, prompt set, run date, frequency and sample count. Treat visibility and share-of-voice scores as vendor-defined estimates, and validate them against first-party citation and referral data when available.
Start with documentation and data from the search and answer engines themselves.
- Bing Webmaster Tools AI Performance - Citation counts, cited URLs and sampled grounding queries across Microsoft AI surfaces.
- Google: Optimizing for generative AI features - Guidance explaining that established SEO practices remain relevant and that Google Search does not require special AI markup or
llms.txt. - Google Search Console generative AI performance reports - Reporting for impressions from AI Overviews, AI Mode and generative features in Discover.
- OpenAI publisher and developer guidance - Discovery, crawler-control and referral-tracking guidance for ChatGPT search.
Platforms that measure how AI engines mention and cite a brand, often with competitor comparisons and prompt-level history. Listed alphabetically.
- Adobe Brand Visibility - Enterprise AI-search visibility, content optimization and brand-performance workflows.
- Ahrefs Brand Radar - Tracks mentions, citations and share of voice across AI and traditional search surfaces.
- AthenaHQ - Prompt analytics, GEO scoring and competitor benchmarking.
- Bluefish AI - Brand visibility and safety monitoring with source attribution.
- Brandlight - AI visibility monitoring with source scoring and response analysis.
- BrightEdge - Enterprise SEO platform with AI search and AI Overviews tracking.
- Conductor - Enterprise organic marketing platform with AI-search visibility features.
- Daydream - AI visibility optimization focused on content discoverability.
- Evertune - Publisher-influence and model-output benchmarking through its AI Brand Index.
- Gauge - Prompt monitoring with competitor comparisons and analytics integration.
- Geneo - Cross-platform monitoring with prompt history and citation logging.
- Goodie AI - GEO monitoring, analysis and optimization workflows.
- Knowatoa - Brand-mention tracking across ChatGPT, Claude and Perplexity with competitor comparisons.
- LLM Pulse - Tracks brand visibility, citations, sentiment, share of voice and AI-referred traffic across major answer engines.
- LLMrefs - Keyword-based AI visibility and brand tracking.
- Otterly.AI - Brand-mention and citation monitoring across AI-search surfaces.
- Passionfruit - Visibility, share of voice, sentiment and revenue attribution tied to AI-answer exposure.
- Peec AI - Country-level visibility benchmarking across ChatGPT, Claude, Gemini and Perplexity.
- Profound - Enterprise answer-engine insights with share of voice, sentiment and citation analysis.
- Quno - Brand-visibility scorecards, prompt-library testing and content workflows.
- Rankscale - GEO rank tracking, source monitoring and competitor comparison.
- Scrunch - AI customer-experience platform with visibility monitoring and agent-facing site controls.
- SE Ranking AI Search Toolkit - AI Overviews and AI Mode tracking inside a broader SEO platform.
- Semrush AI Visibility Toolkit - AI-search visibility and competitor benchmarking across major answer engines.
- seoClarity - Enterprise SEO platform with GEO analytics.
- Trakkr - Scheduled prompt tracking across major models with a public AI ranking.
- Writesonic GEO - Visibility monitoring combined with GEO and content-optimization workflows.
- ZipTie - AI-search visibility monitoring with platform and prompt-level breakdowns.
No-cost utilities and open-source projects with a directly testable AI-search use case. Listed alphabetically.
- Ahrefs AI Visibility Checker - Free snapshot of brand visibility across selected AI assistants.
- AI Search Grader - HubSpot audit of brand presence in AI search.
- Am I on AI? - Quick check of whether ChatGPT recommends a business.
- Knowatoa AI Visibility Scan - One-click scan of how selected AI models answer questions about a brand.
- LLM Pulse Free AI Search Tools - AEO readiness, brand-mention, visibility, crawler and
llms.txtutilities. - NotFair - MIT-licensed agent skills for SEO and GEO audits, including a citation-focused content optimizer.
- Otterly Free GEO Tools - Free AI-search visibility and crawler checks.
Tools with a documented workflow for improving content or site evidence for AI search. Listed alphabetically.
- AirOps - Content workflows for search research, optimization and production.
- Positive Surfer - AI-visibility analysis and content optimization across traditional and generative search.
- Writesonic - Content generation with GEO monitoring and AI-search optimization workflows.
Protocols and validators that help search and retrieval systems discover and interpret current site content. None guarantees inclusion in a generated answer.
- IndexNow - Protocol for notifying participating search engines when URLs are added, updated or deleted.
- llms.txt - Community proposal for publishing an LLM-oriented content index; adoption is experimental, and Google Search says it does not use the file.
- Rich Results Test - Test which structured data Google can read on a page.
- Schema Markup Validator - Validate Schema.org markup independently of a specific search feature.
- Schema.org - Vocabulary for structured data used by search features; no special schema is required for AI Overviews or AI Mode.
- WordLift - Knowledge-graph and structured-data tooling for entity-based search workflows.
Official controls and reference material for bots used in model training, search indexing and user-requested retrieval. Listed alphabetically.
- AI Crawler Index - Reference of AI crawler user agents and their stated purposes.
- Anthropic crawler controls - Guidance for ClaudeBot, Claude-SearchBot and Claude-User.
- Cloudflare AI Crawl Control - Monitor crawler activity and apply per-crawler access policies at the edge.
- Known Agents - Directory of AI agents and crawlers with robots.txt guidance.
- OpenAI crawler controls - Documentation for GPTBot, OAI-SearchBot and ChatGPT-User.
- Perplexity crawlers - Documentation for PerplexityBot and Perplexity-User, including published IP ranges.
Prominent answer engines and assistants with search or retrieval features. Listed alphabetically.
- Baidu AI Search - Chinese search engine with AI-generated answers.
- Bing - Microsoft search with integrated AI answers.
- ChatGPT - OpenAI assistant with integrated web search.
- Claude - Anthropic assistant with web search.
- Copilot - Microsoft assistant with web grounding.
- DeepSeek - Chinese AI assistant with web search.
- Doubao - ByteDance's Chinese AI assistant.
- Gemini - Google's assistant.
- Google AI Overviews and AI Mode - AI-generated answers inside Google Search.
- Grok - xAI assistant with web search.
- Kimi - Moonshot AI assistant with long-context and web-search features.
- Perplexity - Conversational answer engine with citations.
- Phind - AI answer engine focused on developers.
- Qwen - Alibaba's AI assistant.
- Tencent Yuanbao - Tencent's Chinese AI assistant.
- You.com - AI search and assistant platform.
Measure visits and conversions referred by AI assistants. First-party citation reporting is listed above.
- Google Analytics 4 - Track AI referral traffic with channel and source segmentation.
- LLM Pulse AI Traffic - Connects AI-referred sessions, conversions and revenue with visibility reporting.
- Similarweb Gen AI Intelligence - Measures brand visibility, citations, competitors and AI-referred traffic.
Documented programmatic access to AI-search visibility data. Listed alphabetically.
- Canonry API and MCP - Open-source, self-hosted AEO monitoring and execution with a public OpenAPI surface and progressive MCP catalog.
- Keyword.com Developer Platform - Two REST APIs and an OAuth MCP spanning traditional rank tracking and AI visibility.
- LLM Pulse API - A 94-operation REST API for visibility metrics, raw answers, citations, traffic, Search Console, reputation, studies, shopping, ads, projects and automation.
- LLM Pulse MCP - An 88-tool registered MCP surface with OAuth, read/write scopes and per-plan tool filtering.
- Peec AI API and MCP - Public references for reports, raw answers, citations, fan-out queries, shopping, agent traffic and configuration.
- Profound API - Programmatic access to answer-engine insights, raw prompt data and agent analytics.
- Profound MCP - Hosted MCP for analytics, prompts, agents, projects, documents and knowledge bases.
- Rank Prompt API and MCP - Self-serve API and hosted MCP for scans, reports, citations, audits and webhooks.
- Scrunch Developer Platform - REST API and MCP for visibility metrics, raw responses, configuration, signals and AI-agent traffic.
The AI Search API and MCP Benchmark compares public developer surfaces, MCP tool counts, capability breadth, access and documentation quality. It includes separate API and hosted MCP leaderboards, a raw tool-count table, category winners, scoring rules and conflict disclosure.
- China AI Visibility Benchmark 2026 - Aggregate results and a bilingual 42-question prompt panel across six Chinese assistants, published under CC BY 4.0.
- GEO-bench - Benchmark released with the original GEO paper.
- AutoGEO - ICLR 2026 paper on learning generative-engine preferences and evaluating content rewrites.
- Evaluating Verifiability in Generative Search Engines - EMNLP 2023 study of citation correctness and completeness in generative search.
- GEO: Generative Engine Optimization - KDD 2024 paper introducing a black-box optimization framework and GEO-bench.
- SAGEO Arena - Stage-level benchmark for evaluating search-augmented GEO systems.
- CitedIndex Reports & Data - Vendor-directory-derived censuses covering pricing, engine coverage, API and MCP availability, and published methodology.
- LLM Pulse Data Studies - Aggregate studies of how brands and sources appear across AI engines.
- LLM Pulse Blog - Tactics, studies and industry updates on AI search and GEO.
- Search Engine Land: AI SEO - News and analysis about AI in search.
- SEOFOMO - Weekly SEO newsletter covering AI-search developments.
Found something missing or out of date? Read CONTRIBUTING.md and open a pull request with a public canonical URL, a neutral description and any affiliation disclosed.
To the extent possible under law, the contributors have waived all copyright and related or neighboring rights to this work. See LICENSE.