The best AI agents for lawyers, honestly ranked.
From legal-research copilots that cite real case law to contract-review and client-intake agents — we compare the AI tools that actually save attorneys billable hours.
Browse by category
Pick the kind of AI tool you need.
Legal Research & Reasoning Agents
AI copilots that search case law, summarize authority and reason over legal questions — Harvey, CoCounsel, Paxton, Lexis+ AI, vLex Vincent and GC AI.
Explore →Contract Drafting & Review Agents
AI that drafts, redlines and reviews contracts inside Word or your DMS — Spellbook, LegalOn, Luminance, Robin AI and Ivo.
Explore →Practice & Client Intake Automation
Agents that automate client intake, qualification and day-to-day firm workflows — Clio Duo, Smith.ai, Gideon, Lawmatics and Josef.
Explore →Editor's choices
CoCounsel
Legal Research · Legal Research AIThomson Reuters' legal AI assistant with deep Westlaw integration for research, review and drafting
Best for: Firms that want legal AI grounded in Westlaw's case-law database
Harvey
Legal Research · Legal Research AIEnterprise legal AI for sophisticated research, drafting and analysis at large firms
Best for: Big-law and in-house teams wanting the most capable reasoning engine
Spellbook
Drafting & Review · Contract AIAI contract drafting and review inside Microsoft Word for transactional lawyers
Best for: Deal lawyers who want AI drafting and redlining right inside Word
Clio Duo
Practice & Intake · Practice Management AIAI built into Clio's practice-management suite for summaries, drafting and workflow help
Best for: Clio firms that want AI inside their existing matter and billing workflows
Overall ranking
Top 8 across all categories, scored on capability, pricing transparency, fit, and traction.
| # | Vendor | Rating | Pricing | Best for | |
|---|---|---|---|---|---|
| 1 | CoCounsel Legal Research AI | 9.3/10 | From ~$75/user/mo | Firms that want legal AI grounded in Westlaw's case-law database | Explore CoCounsel → |
| 2 | Harvey Legal Research AI | 9.2/10 | Custom (est. $500-1,500/user/mo) | Big-law and in-house teams wanting the most capable reasoning engine | Explore Harvey → |
| 3 | Spellbook Contract AI | 9/10 | From ~$179/user/mo (quote) | Deal lawyers who want AI drafting and redlining right inside Word | Try Spellbook → |
| 4 | Clio Duo Practice Management AI | 8.9/10 | Clio from ~$49/user/mo + AI add-on ~$39 | Clio firms that want AI inside their existing matter and billing workflows | Explore Clio Duo → |
| 5 | Paxton AI Legal Research AI | 8.7/10 | From ~$199/user/mo | Smaller firms that want transparent pricing with citation verification | Try Paxton AI → |
| 6 | vLex Vincent AI Legal Research AI | 8.6/10 | From ~$399/mo | Teams that want global case-law coverage at a lower price than incumbents | Explore Vincent AI → |
| 7 | Smith.ai Client Intake | 8.6/10 | From ~$285/mo | Firms that want every prospect call answered and qualified | Try Smith.ai → |
| 8 | LegalOn Contract Review AI | 8.5/10 | Custom (demo-quoted) | Teams that want attorney-built playbooks driving contract review | Explore LegalOn → |
Firms that want legal AI grounded in Westlaw's case-law database
Explore CoCounsel →Big-law and in-house teams wanting the most capable reasoning engine
Explore Harvey →Deal lawyers who want AI drafting and redlining right inside Word
Try Spellbook →Clio firms that want AI inside their existing matter and billing workflows
Explore Clio Duo →Smaller firms that want transparent pricing with citation verification
Try Paxton AI →Teams that want global case-law coverage at a lower price than incumbents
Explore Vincent AI →Firms that want every prospect call answered and qualified
Try Smith.ai →Teams that want attorney-built playbooks driving contract review
Explore LegalOn →Common questions
What is the best AI tool for lawyers?
It depends on the job. For legal research and complex reasoning, Harvey and Thomson Reuters CoCounsel lead, with Paxton AI and vLex Vincent as strong transparent-priced options. For contract drafting and review, Spellbook and LegalOn are top picks. For client intake and practice automation, Clio Duo (Manage AI) and Smith.ai are widely used.
What is the best AI for legal research?
CoCounsel has the largest user base and deep Westlaw integration, while Harvey is favored by large firms for sophisticated reasoning. Paxton AI publishes transparent pricing with strong citation accuracy, and vLex Vincent AI offers global coverage at a lower price than the incumbents. Always verify cited authority before relying on it.
Can AI write legal contracts and is it safe?
Tools like Spellbook, LegalOn and Luminance draft and review contracts inside Word or your document system far faster than manual review, but AI can hallucinate clauses and miss context. Treat AI output as a first draft: a licensed attorney must review everything, and you remain responsible for your professional duties.