Same question. This is a massive undertaking to do well, and incumbents Lexis and Westlaw gate API behind their own crappy agent. Unsure about vLex or Bloomberg. What’s the scope? U.S. Federal? State? Administrative hearings?

Part of the value of the incumbents are the case treatment (Sheparidizing) and case issue categories. The world is due for a disruptor, but sadly court data is terrible to get. Bad formats, paygates, slow publishing times, and in some cases physically going to the courthouses

Thanks for asking! We're using a multi-source approach:

Case law: Google Scholar + CourtListener's bulk data (great coverage of federal and state appellate decisions).

Statutes & regulations: Currently using Justia for state statutes, but working on scraping directly from state legislature sites. U.S. Code from the Office of Law Revision Counsel's XML releases, and eCFR's APIs for federal regulations.