CourtListener

CourtListener (Free Law Project): US federal + state case law (9M+ opinions, including the historical Caselaw Access Project corpus) and RECAP federal dockets. FIRST CHOICE for any question about a court opinion, judicial decision, or active litigation, AND for historical precedent (Standard Oil, Brown v. Board, Sherman Act cases). Uses semantic + hybrid search by default — write the query in natural language ('cases where shareholders sued directors for ignoring climate risk') and put any term that MUST appear literally in "double quotes" (e.g. '"Section 230" immunity for AI-generated content'). Returns case name, court, citation, date filed, judge, and excerpt.