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Free, nonprofit legal research platform providing searchable access to over 10 million court opinions, PACER documents, oral arguments, and judge financial disclosures.
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CourtListener is operated by the Free Law Project, a 501(c)(3) nonprofit founded with the mission of making the legal ecosystem more equitable and competitive through free access to legal information. The platform hosts over 10 million court opinions spanning hundreds of federal and state jurisdictions, continuously updated with new court documents. It is fully open source, with its codebase publicly available on GitHub.
CourtListener offers full-text opinion search with advanced filters, a citator showing which subsequent opinions cite a given case, CiteGeist relevancy ranking, the RECAP Archive (a repository of PACER federal court filings and dockets crowdsourced by users), oral argument recordings from the U.S. Supreme Court and federal appellate courts, judge profiles and financial disclosure records, and automated case law alerts. The platform has no paywall.
CourtListener is fundamentally different from commercial legal research platforms: it is entirely free, nonprofit-operated, and prioritizes data openness and API access for researchers and legal technologists. While its coverage and secondary source depth cannot match Westlaw or LexisNexis, it provides a level of federal court data transparency — particularly through RECAP — that commercial platforms do not offer.
Best fit: Solo practitioners and public interest lawyers operating on tight budgets, legal aid organizations, law students, academic researchers studying court data, and legal technologists building tools on top of open legal data via the CourtListener API.
Hands-on review pending.