AltData Atlas is a free, open reference directory of alternative data providers, designed for quantitative and fundamental investment teams. Its register catalogues providers across 20 categories, with information on geographic coverage, data history, delivery formats, and indicative pricing. The site features 368 listed providers, including 362 verified entries, and a dedicated chapter for free and open data sources. Verification means a provider’s website is live, operates under its own brand, and has been editorially checked; listings are informational, not paid placements or investment advice.

Atlas organizes its material into chapters covering areas such as foot traffic and mobility, satellite and geospatial data, supply chains and shipping, weather and agriculture, ESG and climate, workforce, transactions, and news and sentiment. Each chapter includes an introductory primer on the data, its potential uses, and costs, followed by a provider register. The directory also covers sources that have been retired and includes a consolidation ledger.