Pile of Law
Pile of Law gathers legal and administrative text from dozens of public sources into a single, consistently formatted corpus. It spans court opinions, statutes and regulations, contracts, administrative rulings, and legislative records, mostly from the United States.
Because the underlying sources carry different terms, the licence varies by subset, and the dataset card documents which licence applies to each. The data is hosted on the Hugging Face Hub, so you can stream it or download the parts you need rather than taking all 256 GB at once.
Related sources
Cambridge Law Corpus
A research dataset of more than 250,000 UK court cases, mostly from the 21st century but with some reaching back to the 16th century. Built by the University of Cambridge for legal natural language processing work, it is available under restricted access for research use.
EDGAR (SEC Filings)
The US Securities and Exchange Commission's repository of corporate filings, including annual reports (10-K), quarterly reports (10-Q), current reports (8-K), and proxy statements. You can search the full text or pull filings in bulk through an API, which makes it a rich source for financial and regulatory RAG.
EUR-Lex
The official portal for European Union law. It provides EU treaties, legislation, case law, and legislative proposals in 24 languages, with bulk download available. A dependable source for multilingual legal and regulatory RAG across the EU.
Free Law Project / CourtListener
The largest open collection of US court opinions, oral argument recordings, and judicial financial disclosures, run by the nonprofit Free Law Project. Its RECAP Archive holds hundreds of millions of federal court docket entries, and journalists at the Wall Street Journal and ProPublica have used it for investigations. A solid base for US legal RAG.