Casetext CoCounsel (legacy)
Casetext (Thomson Reuters) · HQ US · founded 2013 · acquired · Last checked 2026-09-03
Last checked = the date we last re-opened the vendor's published pages. Facts are what the vendor documents, not what it claims in marketing.
First GPT-4-powered legal assistant (March 2023); acquired by Thomson Reuters in August 2023 and merged into CoCounsel Legal and Westlaw. See the Westlaw / CoCounsel record for current facts.
Provisional entry: fewer than four governance facts are sourced yet. It is excluded from search indexes until verified.
- Category
- Legal research · case-law research, document review, brief analysis
- Built for
- Large firms, Mid-sized firms, Small firms & solos
- Model providers (disclosed)
- OpenAI
- Data residency options
- Not disclosed
- Pricing
- Not published
- Markets
- US
- Last checked
- 03 Sept 2026
What the vendor documents
Recorded from the vendor's own trust, privacy and terms pages. "Not disclosed" means we found no public statement, not that the control is absent.
- No training on customer data
- not disclosed
- SOC 2
- not disclosed
- ISO 27001
- not disclosed
- ISO 42001
- not disclosed
- Zero retention with model providers
- not disclosed
- DPA offered
- not disclosed
- Private deployment
- not disclosed
Accuracy evidence
No published accuracy or hallucination evaluation found as of 2026-09-03.
Related incidents
No incidents are recorded for this tool as of 2026-09-03.
Ownership · Acquired by Thomson Reuters for $650M cash, closed 17 Aug 2023.
Sources
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Cite this record
SafeLegalAI Legal Tech Tools, "Casetext CoCounsel (legacy)", safelegalai.com/tools/casetext-cocounsel (last checked 2026-09-03, accessed 2026-09-04). Data: CC BY 4.0.
Also in Legal research
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