By Sector / Legal
Legal AI Vendor Governance
Generative AI tools deployed in law firms scored against ABA Formal Opinion 512 (July 2024), Model Rules 1.1 / 1.6 / 5.1-5.3 / 8.4(c), and state bar AI opinions across NY, CA, FL, DC, TX, IL, NJ.
Why this sector view
Legal AI carries privilege risk that productivity or healthcare AI doesn't — a single prompt to a vendor that trains on inputs can arguably waive attorney-client privilege for the matter. The composite weights ABA Op 512 readiness at 2× baseline and BAA-equivalent at 1.5×.
Primary frameworks anchored
- ABA Formal Opinion 512 (July 2024)
- ABA Model Rules 1.1, 1.6, 5.1, 5.3, 8.4(c)
- NY State Bar Op #1224 (2024)
- California Bar Practical Guidance (2024)
- Florida Bar Op 24-1, DC Bar Op 388
- Fed R Evid 502 / work product doctrine
| # | Vendor | Score | Grade | BAA | Opt-out | US Res | SOC 2 | ISO 42001 | NIST AI | CO AI | §1557 | SR 11-7 | ABA 512 | Subproc | TC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Thomson Reuters CoCounsel | 80 | B | Yes | Yes | Yes | Yes | No | Partial | Partial | N/A | N/A | Yes | Yes | 4/5 |
| 2 | Lexis+ AI | 76 | B | Yes | Yes | Yes | Yes | No | Partial | No | N/A | N/A | Yes | Yes | 4/5 |
| 3 | Westlaw Precision AI | 76 | B | Yes | Yes | Yes | Yes | No | Partial | No | N/A | N/A | Yes | Yes | 4/5 |
| 4 | Harvey | 74 | B | Yes | Yes | Yes | Yes | No | Partial | Partial | N/A | N/A | Yes | Partial | 3/5 |
| 5 | Ironclad AI | 63 | C | Yes | Yes | Yes | Yes | No | No | No | N/A | N/A | Partial | Yes | 4/5 |
| 6 | Spellbook | 45 | D | Yes | Yes | Partial | Partial | No | No | No | N/A | N/A | Partial | Partial | 2/5 |
Buyer's guide for this sector
For a law firm adopting generative AI, the highest-leverage scoring axes are BAA-equivalent (mandatory for matter-confidential content), ABA Op 512 readiness (the controlling ethics framework), training-data opt-out (privilege-preservation gate), and US data residency. Vendors at C or below carry significant disciplinary defensibility risk if a state bar audits firm AI use.
Operationalize the scoring
AI Governance for Law Firms
The Index tells you which vendors clear the bar. The companion resource tells you how to turn that selection into a deployable governance program with documented evidence.
AI Governance for Law Firms →Scoring as of 2026-05-13 from public information (vendor trust portals, BAAs, SOC report cover pages, model cards, vendor documentation). Posture changes frequently — re-verify with the vendor's trust center before contract. Methodology: read the full methodology.
Turn the scoring into a deployable program
The Index tells you the posture. These engagements turn the posture into operational evidence.