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.