Fiduciary-Grade AI™
Do the work that got you into law in the first place
Most AI makes you faster — CoCounsel makes you better, with citation-backed answers grounded in Westlaw and Practical Law and integration that works the way you do
A different category of AI — built for the way legal professionals work
Answers grounded in the sources that matter
Most AI gives you an answer. CoCounsel Legal gives you a defensible one — grounded in Westlaw and Practical Law, with citations your name can go on. The reasoning path is visible from start to finish, every source is linked, and you can click through to verify the work yourself. No black box. Just real legal work professionals at law firms and government agencies can confidently stand behind.
Work you can defend
Every answer is backed by citations and linked to its source. The reasoning path is visible from start to finish — so there’s no black box and no guessing where an answer came from.
Research, drafting, and analysis — together
CoCounsel Legal handles complex legal tasks end to end from a single plain-language query. Matter history, precedents, and templates stay in one workspace throughout the life cycle.
Your data always stays your data
Your organization’s precedents, templates, and prior positions power the reasoning and are never used to train underlying models — they’re always yours. This is a secure investment that gets stronger over time.
Introducing Westlaw Brief Builder
Build litigation briefs from issue framing to argument structure, all grounded in Westlaw and Practical Law authority. The attorney stays in control, reviewing facts, choosing arguments, attaching relevant authority, and validating the draft and citations to build briefs faster under tight deadlines.
Tabular Analysis, powered by Thomson
Review up to 10,000 documents against 100 questions in one dynamic, filterable table. It’s powered by Thomson, our own legal-trained AI model, so every answer reasons like a lawyer and traces back to a clickable citation.
Deep Research, from prompt to precedent
Deep Research integrates advanced AI with trusted Westlaw content to deliver expert-level legal research — a comprehensive, multistep report that surfaces key precedents, relevant authorities, and unique insights, so you move from question to confident decision faster.
See what CoCounsel Legal can do for your team
Don’t take our word for it
Listen to what Troutman Pepper Locke LLP has to say
The next generation of CoCounsel Legal seems to be a total game-changer as we’ve introduced it to litigation & transactional attorneys. It’s meeting them within their workflows, allowing them to ask plain language questions & then see the step-by-step approach that CoCounsel Legal takes to help them draft the document relying upon Westlaw Deep Research and the Practical Law guidance.
Andrew P. Medeiros
Managing Director of Innovation, Troutman Pepper Locke LLP
See CoCounsel Legal — The CoCo insists
Book a personalized demo for your team
Your team’s reputation depends on the work. See how the only legal AI built on Westlaw, Practical Law, and your organization’s knowledge delivers work you can defend.