What are the top AI tools for contract review and legal research?

Researching for top AI tools for contract review and legal research makes for a lot of room for trial and error. As I came across G2's AI Legal Assistant category, I shortlisted a few tools that stood out in terms of reviews for contract accuracy, ethical research, data security, confidentiality, integration, and cost. Here are the five tools:

1. CoCounsel – Combines contract analysis with deep legal research, backed by trusted legal databases. How reliable has it been for you in reducing research errors?
2. Luminance – Uses AI to highlight anomalies and spot risks in high-volume contract sets. Does it scale well for large audit projects?
3. Filevine – Offers contract management with AI-powered search and compliance checks. How effective is it for firms in balancing contract drafting and research?
4. Robin AI – Focused on contract drafting and risk clause automation with natural language search. Has it improved accuracy in spotting hidden compliance risks?

Hey G2, in case you've come across these solutions, could you help me know

1. What are the user adoption shifts that show ROI across teams?
2. Which one of these tools has made a difference for your team
3. From an integration perspective, does it handle enterprise-grade documentation ERPs?