Bloomberg Law is a subscription-based service for online legal research. The service, which Bloomberg L.P. introduced in 2009, provides legal content, proprietary company information and news information to attorneys, law students, and other legal professionals. More specifically, this commercial legal and business technology platform integrates Bloomberg L.P. news with Bloomberg BNA's primary and secondary legal content and business development tools.
Westlaw is an online legal research service for lawyers and legal professionals in the United States and the United Kingdom and is a product of Thomson Reuters. In addition, it provides proprietary database services. Information resources on Westlaw include more than 40,000 databases of case law, state and federal statutes, administrative codes, newspaper and magazine articles, public records, law journals, law reviews, treatises, legal forms and other information resources. -- Wikipedia