Head-to-head comparison
CoCounselvsHarvey
CoCounsel and Harvey are the two legal AI platforms large firms compare. CoCounsel comes from Thomson Reuters and is grounded in Westlaw and Practical Law, so its research citations come from authoritative sources. Harvey is a well-funded startup that builds custom workflows and agents for firms, with a reputation for polish and flexibility.
At a glance
| CoCounsel | Harvey | |
|---|---|---|
| Category | Productivity | Productivity |
| Function | Legal AI | Legal AI |
| Pricing | Paid | Paid |
| Starting price | Custom pricing; typically bundled with Westlaw subscriptions | Custom enterprise pricing |
| Released | March 2023 | March 2026 |
CoCounsel
Pros
- Grounded in the most authoritative US legal content
- Citations are real and checkable
- Trusted vendor with professional liability posture
Cons
- Expensive and tied to Thomson Reuters contracts
- Less flexible than startups on custom workflows
- US-centric content depth
Harvey
Pros
- Genuinely tuned for legal work, not a generic model with a legal skin
- Speeds up document review that used to take associates hours
- Backed by real deployments at large firms, not just a demo
Cons
- Enterprise-only pricing, inaccessible to solo practitioners or small firms
- Still requires a qualified lawyer to check every output — no shortcut around liability
- Onboarding and workflow integration take real setup time
Which one should you pick?
Pick CoCounsel if
Your firm already subscribes to Westlaw, research with verified citations is the main job, and you want a single vendor with an established liability posture.
See CoCounsel details →Pick Harvey if
You want bespoke workflows for your practice areas, agents that draft and review at scale, or a vendor that will build alongside your innovation team.
See Harvey details →Bottom line
CoCounsel for research grounded in Westlaw. Harvey for custom workflows and agents. Many large firms end up licensing both for different tasks.