Lexis+ AI

Lexis+ AI is a conversational legal-research tool that works against the Lexis case-law database and the Shepard’s system, letting lawyers ask questions in free-form language and get source-backed answers. One standout advantage is real-time citation verification through Shepard’s, which helps confirm that a cited ruling is still valid and hasn’t been overturned. The tool also offers insights predicting possible case outcomes based on historical data, which can help in building legal strategy. The product is sold within LexisNexis as part of an enterprise subscription.

The tool is mainly suited to firms engaged in intensive litigation research, where the ability to quickly locate relevant, up-to-date case law is critical. For lawyers like this, combining conversational search with Shepard’s verification can significantly shorten case-prep time. Pricing isn’t publicly published, and organizations receive a custom quote based on usage scope and number of users.

That said, a 2024 Stanford University study found significantly high hallucination rates in AI-based legal research tools in general, including tools of this kind. This means that even with Shepard’s verification, lawyers still need to independently verify citations before relying on them in court. Anyone looking for a tool they can trust completely without further checking may be disappointed, since no tool in this category has yet reached that level of accuracy.