Summary
In a remarkable coincidence, Thomson Reuters and LexisNexis both unveiled major AI assistant updates on the same day in August 2024. The simultaneous launches signal the intensifying competition in legal AI research tools.
In a remarkable coincidence highlighting the competitive intensity of the legal AI market, Thomson Reuters and LexisNexis both unveiled major AI assistant updates on the same day in August 2024.
**Thomson Reuters CoCounsel 2.0**
- Described as "supercharged" compared to the original
- Operates three times faster than first generation
- Generates answers in seconds rather than minutes
- Better understanding of natural communication
- More thorough, nuanced results
- Built on the Casetext acquisition ($650 million, August 2023)
**LexisNexis Protégé**
- Introduced agentic AI capabilities
- Emphasis on personalization based on user profiles and preferences
- Autonomous task completion capabilities
- Ability to review its own work
- Made generally available in January 2025
The simultaneous launches reflect:
- Both companies racing to establish AI leadership
- Similar timelines driven by underlying technology maturity
- Market pressure from enterprise clients demanding AI capabilities
- Competition from startups like Harvey forcing innovation pace
Strategic differences:
- **Thomson Reuters**: Focused on integration with Westlaw, Practical Law, and acquired Casetext capabilities
- **LexisNexis**: Multi-model approach allowing access to various AI models within secure environment
Both companies are investing heavily in "agentic AI"—systems that can complete multi-step tasks autonomously rather than simply answering questions. This represents the next evolution beyond basic AI assistants.
For law firm technology decision-makers, the simultaneous launches presented a clear choice between platforms, with most firms already committed to either Westlaw or LexisNexis for primary research. The AI capabilities are increasingly becoming a key differentiator in platform selection.