Case law research tools allow users to find caselaw to support legal arguments, suggest caselaw in opposition of an argument, and verify whether case law is still valid. Users can search various databases (often jurisdiction based) to find case law that supports or contradicts a legal argument. Many research databases include tools to verify whether a case is still good law or is overturned.Some providers have introduced solutions underpinned by sophisticated technology, such as AI or analytics. Incumbent providers in the USA and UK are Westlaw and LexisNexis, with Bloomberg making up the third large player in the US. In jurisdictions such as continental Europe, Wolters Kluwer is another leader. This category, due to the jurisdictional nature of legal research, varies significantly by region. In the USA, new entrants to the market include Fastcase and Casetext.