Snowflake Marketplace
Snowflake Marketplace lets providers publish data that subscribers can query in place, without copying files around. Once you subscribe to a listing, the data appears in your Snowflake environment as if it were your own table and stays up to date as the provider refreshes it.
The catalogue leans commercial, covering things like market feeds, consumer demographics, weather histories, and firmographic data, though there are free and sample listings too. Access is through Snowflake's cloud data platform, so you generally need a Snowflake account to make use of it.
Pricing and licence terms are set by each provider, so check the listing before you rely on it. For RAG teams already working in Snowflake, it is a convenient way to bring in structured reference data that updates on its own.
Related sources
AWS Data Exchange
A marketplace for finding, subscribing to, and using third-party data inside the AWS cloud. It carries both free open datasets and paid commercial data products, so you can pull licensed data straight into your AWS workflows without setting up separate transfers.
AWS Open Data Registry
A registry of high-value datasets hosted on AWS and made publicly available, covering genomics, geospatial data, climate, satellite imagery, and more. Over 300 PB of data in total, free to access: you pay only for the compute you use to process it.
Datahub.io
A platform for publishing and finding open data packages: datasets bundled with consistent metadata in standardised formats. It hosts curated collections of widely used reference data, from country codes to exchange rates, ready to drop into a pipeline.
Google Dataset Search
A search engine for datasets that indexes millions of them from thousands of repositories worldwide. It does not host data itself: it points you to wherever each dataset lives, which makes it a fast first stop when you are hunting for a source on a specific topic.