CoCounsel
Part of the Thomson Reuters platform.
How this is computed · one composite score, recomputed across all 28 months, ranked on a 3-month moving average
How Hype Index is computed · prospect-to-user intent ratio over the 24-month window
What it is
CoCounsel is Thomson Reuters’ AI legal research assistant, built on the Casetext platform acquired for $650M in 2023. It combines GPT-powered legal AI with Westlaw’s case law database — the first major integration of generative AI into a traditional legal research platform.
Previously known as Casetext, which challenged the legal research market with Parallel Search (AI-powered concept matching) and pricing that undercut Westlaw and LexisNexis. Now bundled with Westlaw as CoCounsel, the standalone pricing advantage is gone, but the AI capabilities have expanded significantly.
What It Does
- Legal research — AI-powered case law search across 50 states and federal courts
- Contract review — Automated clause analysis and risk flagging
- Document review — Concept-based search across document sets (AllSearch)
- Brief drafting — AI-assisted memo and brief generation
- Deposition preparation — Automated question generation from case files
Who It’s For
10,000+ organisations from solo practitioners to Am Law 200 firms. Now positioned as the AI layer on top of Westlaw, targeting both existing Thomson Reuters customers and new adopters looking for AI-assisted research.
What We Haven’t Verified
- Current pricing structure post-acquisition (standalone vs. Westlaw bundle)
- Accuracy benchmarks for AI-generated legal research vs. manual Westlaw search
- Whether the original Casetext standalone product remains available
Integrations
Platforms CoCounsel integrates with. Depth — where curated — reflects how native the connection is. Uncurated entries render without a depth dot.
- Westlaw
- Practical Law
- Microsoft Word
- Microsoft Teams
- Microsoft Outlook
- Box
- Dropbox
- Google Drive
- HighQ
- iManage Cloud
- iManage On-Prem
- Litify
- NetDocuments
- Microsoft SharePoint
- Smokeball
Deep — bi-directional API Medium — one-way sync / webhook Shallow — middleware / Zapier-class
Community ratings
Alternatives
Other Legal Research vendors in the directory. "Compare" pages are editorial and coming as we build them.
- #01 Thomson Reuters
- #02 LexisNexis — Legal research, analytics and workflow solutions
- #06 Westlaw
- #11 Wolters Kluwer
- #18 vLex
- #21 Bloomberg Law
- 2026-05Troutman Pepper Locke — Firmwide AI innovation with CoCounsel Legalsource ↗
- 2026-03Morgan Lewis — Driving attorney adoption of CoCounsel Legal on active matterssource ↗
- 2025-12Borden Ladner Gervais — Firmwide rollout of CoCounsel, expanding multi-decade Thomson Reuters partnershipsource ↗
- 2025-12Chamberlain Hrdlicka — First Houston firm to commit to adopting CoCounsel Legalsource ↗
- 2025-07Polsinelli — Firmwide implementation of Thomson Reuters CoCounsel across 1,200+ attorneyssource ↗
We haven't found any webinars offered by CoCounsel yet — see all legal tech webinars.
- Thomson Reuters SYNERGY 2026expected presenceNov 16
"Expected presence" comes from our event-to-vendor mapping — vendors we associate with the event, not a confirmed listing on the event's sponsor page. Sponsor rows cite the event's own page.