Casetext, now integrated into Thomson Reuters after its acquisition, offers CoCounsel — an AI legal research assistant that searches case law, summarizes relevant cases, and drafts research memos. It's trained on legal data and designed to produce the kind of sourced, accurate output that legal work demands. The legal research capability is its core strength: ask a legal question, and CoCounsel retrieves relevant cases, synthesizes the legal principle they establish, and cites its sources. Deposition preparation, contract analysis, and document review round out its capabilities. For lawyers who spend significant time on legal research, CoCounsel's ability to compress hours of case law review into minutes represents a real efficiency gain — particularly for tasks like initial research and identifying relevant precedent.