CoCounsel vs Harvey
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose CoCounsel if you want thomson reuters legal ai assistant for research, drafting, and document review (Supervised agent, enterprise); choose Harvey if you want ai platform for legal and professional services with supervised legal agents (Supervised agent, enterprise).
| CoCounsel | Harvey | |
|---|---|---|
| What it is | Thomson Reuters legal AI assistant for research, drafting, and document review | AI platform for legal and professional services with supervised legal agents |
| Type | product-with-agents | product-with-agents |
| Autonomy | Supervised agent | Supervised agent |
| Pricing | enterprise | enterprise |
| Best for | enterprise, mid-market, smb | enterprise, mid-market |
| Deployment | saas | saas, api |
| Modalities | text | text, api |
| Models | model-agnostic, gpt, claude, gemini, proprietary | model-agnostic, gpt, claude, gemini |
| Protocols | none | rest-api |
| Integrations | Westlaw, Practical Law, Microsoft Word, Microsoft 365, iManage, SharePoint | iManage, Microsoft Word, Microsoft Outlook, SharePoint, Box, LexisNexis |
| Capabilities | 5 documented | 4 documented |
CoCounsel
- +Grounded in authoritative Westlaw and Practical Law content with source-linked, traceable outputs
- +Backed by Thomson Reuters with broad scale (reportedly 1M+ users across 107 countries as of February 2026)
- +Multi-model architecture spanning frontier models (reported: Anthropic, OpenAI, Google) plus proprietary AI for performance control
- -Hallucination and accuracy risk is material in a high-stakes domain; lawyers must validate every output
- -Enterprise, quote-only pricing tied to multi-year terms (no transparent self-serve plan)
Harvey
- +Deep, verifiable enterprise traction (use across a majority of the Am Law 100 and a PwC alliance)
- +Purpose-built legal workflows with LexisNexis primary law and tight Microsoft and iManage integration
- +Extremely well-capitalized, lowering vendor-survival risk
- -Hallucination risk is material in a high-stakes domain; even with low reported rates, customers stress validating every output
- -Expensive, opaque, quote-only pricing with seat minimums
Which should you choose?
CoCounsel is thomson reuters legal ai assistant for research, drafting, and document review, best for enterprise, mid-market, smb. Harvey is ai platform for legal and professional services with supervised legal agents, best for enterprise, mid-market. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.
This comparison is generated from the sourced CoCounsel and Harvey profiles. Open either profile to review its evidence and last-reviewed date.