judyrecords: Instantly search 740M+ United States court cases
PACER: PACER is the official case management system of US Federal Judiciary
56M+ federal court cases, including bankruptcy, criminal, civil, and appellate
Fee-based for every kind of request for case info, including each search result page viewed, and even when a search returns no results
CourtListener: Primarily focused on federal courts, state courts of last resort, and state appellate courts
4M+ Federal/State court opinions
70K+ oral arguments
38K+ hours of oral argument audio
Free
Docket Alarm: Delivers Federal state, and IP agency filings to attorneys, paralegals. Search and run analytics
26M+ federal cases
91M+ state cases
19M+ specialized agency cases (patent, trademark, tax, international trade, etc.)
Free searches + premium access upsell
UniCourt: Uses powerful data normalization processes and algorithms to add value to their legal data, which includes normalization of case classification and entity names (e.g., people, companies, attorneys, law firms, judges)