Free & open

Resources

Free dataset sources, open data portals and developer-friendly data APIs worth knowing about before you pay for data. See also our Free Datasets directory for which BuyDataHub providers offer no-cost access, and our Public Datasets page for buying tips.

Free dataset hubs

Kaggle

A huge community-driven catalog of free public datasets, notebooks and ML competitions.

Google Dataset Search

A free search engine for finding where public datasets are hosted across the web.

Government data portals

Data.gov

The U.S. federal government's open data catalog spanning health, climate, finance and more.

Eurostat

Free, harmonized economic and demographic statistics across European Union member states.

World Bank Open Data

Free global development, economic and demographic data covering most countries.

AI dataset repositories

Hugging Face Datasets

A large hub of datasets structured for machine learning training and evaluation.

Geospatial data resources

OpenStreetMap

A free, community-maintained map of the world with open geospatial data.

Developer-friendly data APIs

AWS Open Data Registry

A registry of public datasets hosted on AWS infrastructure, free to access via cloud services.