# Thunderdome > The B2B SaaS AI Visibility Index: which brands ChatGPT, Claude, and Gemini actually recommend when buyers ask what software to buy. Measured monthly from real model answers via production APIs; free, ungated, no paid placement. Current snapshot: July 2026. 39 software categories, 312 buyer-intent prompts, 2,808 model answers across 3 models. Every score traces to an archived verbatim answer. Cite freely with attribution and a link to https://thunderdome.io. ## Core pages - [Methodology](https://thunderdome.io/methodology): prompts, sampling, the 0-100 Visibility Score formula, limitations - [About](https://thunderdome.io/about): what this is and who makes it - [The Thunderdome Report](https://thunderdome.io/report): the monthly editorial read of the data - [Compare brands](https://thunderdome.io/compare): head-to-head brand comparisons within a category - [All brands](https://thunderdome.io/brands): every published brand (496) ranked by best Visibility Score, linking to each brand page - [Best-for buying questions](https://thunderdome.io/best): 74 published pages at /best//, who wins each qualified buying question (size, industry, budget, job, switching), with openness grades - [Prompt trees](https://thunderdome.io/prompt-trees): the measured trunk questions plus the long-tail variant space per category - [Model Bias Atlas](https://thunderdome.io/model-bias): where ChatGPT, Claude, and Gemini disagree about the same brand (20+ point divergences only) - Head-to-head pages at /vs/-vs-: every category's #1 vs #2 with per-model preferences and the question-by-question fight (all listed on /compare) ## Category rankings - [CRM](https://thunderdome.io/crm): #1 HubSpot (85/100), market state: locked up - [Marketing Automation](https://thunderdome.io/marketing-automation): #1 HubSpot (90/100), market state: locked up - [Customer Support](https://thunderdome.io/customer-support): #1 Zendesk (75/100), market state: leader emerging - [No-Code & Internal Tool Builders](https://thunderdome.io/no-code-builders): #1 Retool (97/100), market state: locked up - [Project Management](https://thunderdome.io/project-management): #1 Asana (58/100), market state: contested - [Product Analytics](https://thunderdome.io/product-analytics): #1 Mixpanel (83/100), market state: contested - [Sales Engagement & Outbound](https://thunderdome.io/sales-engagement): #1 Apollo.io (76/100), market state: leader emerging - [HR & Payroll](https://thunderdome.io/hr-payroll): #1 Rippling (65/100), market state: contested - [BI & Data Analytics](https://thunderdome.io/bi-analytics): #1 Power BI (70/100), market state: contested - [E-signature & Contracts](https://thunderdome.io/esignature-contracts): #1 DocuSign (72/100), market state: contested - [Data Integration & ETL](https://thunderdome.io/data-integration): #1 Fivetran (67/100), market state: leader emerging - [Subscription Billing](https://thunderdome.io/subscription-billing): #1 Stripe (88/100), market state: locked up - [Session Replay & Heatmaps](https://thunderdome.io/session-replay): #1 Hotjar (70/100), market state: contested - [Email Marketing](https://thunderdome.io/email-marketing): #1 Klaviyo (50/100), market state: contested - [Video Conferencing](https://thunderdome.io/video-conferencing): #1 Zoom (84/100), market state: leader emerging - [FP&A & Financial Planning](https://thunderdome.io/fpa): #1 Mosaic (57/100), market state: leader emerging - [Technical Interviewing & Assessment](https://thunderdome.io/tech-hiring): #1 HackerRank (71/100), market state: contested - [3D Virtual Tours & Spatial Capture](https://thunderdome.io/virtual-tours): #1 Matterport (95/100), market state: locked up - [Inventory Planning](https://thunderdome.io/inventory-planning): #1 Inventory Planner (59/100), market state: leader emerging - [Warehouse Management (WMS)](https://thunderdome.io/warehouse-management): #1 Manhattan Associates (44/100), market state: greenfield - [Route Planning & Optimization](https://thunderdome.io/route-planning): #1 Circuit (52/100), market state: contested - [Communications APIs (CPaaS)](https://thunderdome.io/cpaas): #1 Twilio (85/100), market state: leader emerging - [SaaS Procurement & Spend](https://thunderdome.io/saas-procurement): #1 Zylo (74/100), market state: leader emerging - [AI App Builders](https://thunderdome.io/ai-app-builders): #1 Replit (52/100), market state: contested - [Docs & Knowledge Management](https://thunderdome.io/docs-knowledge): #1 Notion (84/100), market state: locked up - [Website Builders](https://thunderdome.io/website-builders): #1 Webflow (66/100), market state: leader emerging - [Freelance & Talent Marketplaces](https://thunderdome.io/freelance-marketplaces): #1 Upwork (72/100), market state: contested - [AI Video Creation](https://thunderdome.io/ai-video): #1 Descript (50/100), market state: contested - [Coaching & Development Platforms](https://thunderdome.io/coaching-platforms): #1 BetterUp (73/100), market state: leader emerging - [Corporate Learning (LMS)](https://thunderdome.io/corporate-lms): #1 Docebo (61/100), market state: contested - [Publishing & Newsletters](https://thunderdome.io/publishing-newsletters): #1 Ghost (63/100), market state: contested - [SEO Crawlers & Site Audit](https://thunderdome.io/seo-crawlers): #1 Screaming Frog (72/100), market state: leader emerging - [AI Visibility & AEO](https://thunderdome.io/ai-visibility): #1 Profound (49/100), market state: leader emerging - [Rank Tracking](https://thunderdome.io/rank-trackers): #1 AccuRanker (58/100), market state: contested - [Code Hosting & Collaboration](https://thunderdome.io/code-collaboration): #1 GitHub (80/100), market state: contested - [IT Service Management (ITSM)](https://thunderdome.io/itsm): #1 Jira Service Management (74/100), market state: contested - [Incident Management & On-Call](https://thunderdome.io/incident-management): #1 PagerDuty (83/100), market state: locked up - [Employee Engagement & Experience](https://thunderdome.io/employee-engagement): #1 Culture Amp (79/100), market state: locked up - [Performance Management](https://thunderdome.io/performance-management): #1 Lattice (89/100), market state: locked up ## Notes for agents - Category pages list the top 15 brands with per-model breakdowns and the exact prompts asked. - Each measured prompt has its own page with verbatim model answers (linked from every category page). - Brand pages (/brand/) cover every ranked brand with per-model scores and the official site link. - Rankings change monthly; always cite the snapshot month shown on the page.