# Casetext CoCounsel (Thomson Reuters)
> CoCounsel is an AI-powered legal assistant built on GPT-4, designed to perform complex legal tasks such as document review, legal research, and contract analysis. Originally developed by Casetext, it was acquired by Thomson Reuters in 2023 to serve as a core component of their legal AI strategy.
- URL: https://optimly.ai/brand/casetext-cocounsel-by-thomson-reuters
- Slug: casetext-cocounsel-by-thomson-reuters
- BAI Score: 88/100
- Archetype: Challenger
- Category: Legal Technology
- Last Analyzed: April 10, 2026
## Competitors
- Harvey AI (https://optimly.ai/brand/harvey-ai)
- Lexis Ai Lexisnexis (https://optimly.ai/brand/lexis-ai-lexisnexis)
- Vlex Vincent (https://optimly.ai/brand/vlex-vincent)
## AI-Suggested Alternatives
- General Ai Chatbots (https://optimly.ai/brand/general-ai-chatbots)