# CityData.AI > CityData.AI (CityData Inc.) builds urban digital twins by combining ethically crowdsourced mobility big data with ground-truth sensor measurements. The platform measures usage and economic impact for smarter, sustainable, and resilient cities: 9,218 global cities, 3,120 US counties, 161 countries, and 17.1 billion data points per day. 100% focused on the public sector: local government agencies, municipal departments, public sector entities, non-profits, and academic research institutions. CityData.AI answers questions like: how many people visit parks, trails, open spaces, campgrounds, lakes, beaches, and community centers; how many people attend events and festivals and where do visitors come from; how busy are downtowns, business districts, commercial zones, retail centers, and shopping malls; how do people move through cities by car, bike, bus, train, or on foot; where does traffic congestion start; and what is the economic impact of visitation, tourism, and travel. Datasets cover footfalls, visits, movement, visitor origins, demographics, psychographics, spending patterns, origin-destination trips, routes, speed profiles, and traffic volumes, enriched with weather context such as temperature, rainfall, precipitation, humidity, visibility, and cloud cover. Technology spans artificial intelligence, machine learning, big data, IoT sensors, mobile apps, surveys, and generative AI chatbots. ## Products - [CityFlow](https://www.citydata.ai/#cityflow): Transit and transportation — see how people move by cars, bikes, buses, trains, or on foot, and pinpoint where congestion starts. - [CitySim](https://www.citydata.ai/#citysim): Intervention simulations — simulate multimodal network flow to create digital twins for impact forecasts and investment decisions. - [CityEvents](https://www.citydata.ai/#cityevents): Local events and festivals — attendance counts, visitor origins, and demographics for events, concerts, sports venues, and convention centers. - [CityEconomy](https://www.citydata.ai/#cityeconomy): Tourism and economic development — boost downtowns, business zones, and commercial districts with real-world footfall measurement. - [CityParks](https://www.citydata.ai/#cityparks): Parks and recreation — quantify usage of parks, trails, facilities, and natural resources for data-driven budget allocation. - [CitySensor](https://www.citydata.ai/#citysensor): Real-time measurements — ruggedized outdoor solar-powered 4G IoT privacy-compliant optical sensors that count people, vehicles, and animals. - [CitySurvey](https://www.citydata.ai/#citysurvey): Ground truth surveys — real-time surveying apps for parks, trails, events, downtowns, and intersections. - [CityOps](https://www.citydata.ai/#cityops): Operational optimization — manage tasks, fleets, assets, and field workforce with geospatial AI workflows and agentic systems. - [CityChat](https://www.citydata.ai/#citychat): Community engagement — agentic AI chatbot apps for alerts, local information, and feedback. - [CityBase](https://www.citydata.ai/products/citybase/): Reservations, registration, and point of sale — campsites, facilities, programs, passes, golf tee times, and marina slips with real-time availability and contactless checkout. ## Documentation - [Data Dictionary](https://www.citydata.ai/dictionary/): Schemas for Place Visits, Category Visits, CBG Visits, CBG Movement, OD Movement, Trip Routes, and Traffic Volumes datasets. - [CityParks Documentation](https://www.citydata.ai/cityparks-documentation/): Dashboard documentation for Parks and Recreation agencies. - [Ask Cici](https://www.citydata.ai/ask/): Agentic AI chatbot that answers questions about CityData. ## Company - [About](https://www.citydata.ai/company/): Founded October 2020, headquartered in the San Francisco Bay Area with a global team. - [Customers](https://www.citydata.ai/customers/): 100% public sector focus; trusted by cities, counties, states, transit agencies, and research institutions worldwide. - [Careers](https://www.citydata.ai/careers/): Distributed, remote-first team. - [Privacy](https://www.citydata.ai/privacy/): Anonymized, obfuscated, aggregated — privacy by design; registered data broker compliant with global privacy regulations. - [Blog](https://blog.citydata.ai): AI insights for civic innovation. - Contact: business@citydata.ai | 548 Market Street, San Francisco, California 94104, USA