Last reviewed on October 3, 2026.
Updated October 2026. An earlier version of this article contained market-size figures, adoption percentages, a quote and predictions that we could not source. We have replaced it with developments that can be checked.
1. Consolidation: fewer, bigger vendors
| When | Deal | Why it matters |
|---|---|---|
| Aug 2023 | Thomson Reuters acquires Casetext (US$650M); Casetext retired April 2025 | CoCounsel now sits inside the Thomson Reuters ecosystem (details) |
| Aug 2023 | Reveal acquires Logikcull and IPRO | Self-service eDiscovery moves into a larger platform (Logikcull review) |
| 2024 | Mitratech acquires HotDocs | Document automation joins a legal-ops suite (HotDocs review) |
| Nov 2025 | Clio completes US$1B acquisition of vLex (incl. Fastcase, Vincent AI) | Practice management and legal research under one owner (vLex review) |
| Jun 2026 | Relativity announces acquisition of Gavel (formerly Documate) | eDiscovery platform extends into document automation (Gavel review) |
What to do: before signing multi-year deals, ask vendors about ownership, roadmap commitments and data portability.
2. Generative AI is now built into the research platforms
The large research providers all ship generative-AI assistants: CoCounsel with Westlaw, Lexis+ AI and Protégé from LexisNexis, and Vincent AI from vLex (now Clio). Independent players such as Harvey have raised large rounds – Harvey was valued at $15.5 billion in September 2026 (funding timeline).
3. Hallucinations remain a professional-conduct risk
Since Mata v. Avianca (S.D.N.Y. 2023), courts in many jurisdictions have sanctioned lawyers for filing AI-fabricated citations. A 2024 Stanford RegLab/HAI study found that even legal-specific research tools gave incorrect or misgrounded answers on a meaningful share of test queries. Verification is not optional.
4. Ethics guidance has caught up
The ABA's Formal Opinion 512 (July 2024) addresses competence, confidentiality, communication, supervision and fees when lawyers use generative AI, and many state bars have issued their own guidance. Our ethics framework and AI policy guide turn this into practice.
5. Regulation is arriving unevenly
- EU AI Act: entered into force in August 2024 with obligations phased in; the EU has proposed postponing some high-risk obligations, so check the current timetable.
- Colorado AI Act: delayed to 30 June 2026 and subject to further amendment efforts.
- Courts: many judges have standing orders on disclosure or certification of AI use in filings.
6. From chat to agents
Vendors increasingly market "agentic" features that carry out multi-step tasks (research, then draft, then check). Treat these as supervised assistants: define what they may do, log what they did, and review the output. See agentic AI in legal practice.
What this means for buyers
- Prefer tools that cite sources you can open and verify.
- Negotiate data-use, retention and exit terms up front.
- Measure results against a baseline (ROI framework).