Kira Systems vs Casetext CoCounsel (Thomson Reuters)
AI Legal Tools pricing comparison · 2026
Kira Systems pricing ranges from $500–$5000/month, while Casetext CoCounsel (Thomson Reuters) ranges from $225–$900/user/month. Casetext CoCounsel (Thomson Reuters) is typically 75% more affordable, though your actual cost depends on tier and team size.
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Kira Systems and Casetext CoCounsel (Thomson Reuters) both operate in the ai legal tools category. This page compares their list pricing.
Plan-by-Plan Pricing
| Plan | Kira Systems | Casetext CoCounsel (Thomson Reuters) |
|---|---|---|
| Small Business | $500 /month | $225 /user/month |
| Enterprise | $3.5K /month | $500 /user/month |
| Global Enterprise | Free | $900 |
Cost at Scale
Total cost of ownership — licenses, implementation, and hidden costs included.
Kira Systems
3 scenarios$500/month ($5,000/year with annual billing)
Small Law Firm Due Diligence (5 users)
Add $2,000-$4,000 for initial implementation and training (one-time). Total first-year cost: $7,000-$9,000.
$3,500/month ($35,000/year with annual billing)
Mid-Size Corporate Legal Team (50 users)
Add $10,000-$20,000 for enterprise implementation, data migration from SharePoint, and custom model training (one-time). Ongoing training: $5,000/year. Total first-year cost: $50,000-$60,000.
$15,000
Global Financial Institution (500 users, on-premise)
$25,000/month ($180,000-$300,000/year) for custom licensing. Add $30,000-$50,000 for on-premise infrastructure and deployment (one-time), $20,000-$40,000 for custom model development (one-time), and $15,000-$50,000/year for infrastructure maintenance. Total first-year cost: $245,000-$440,000.
Casetext CoCounsel (Thomson Reuters)
3 scenarios$2,700/year ($225/month)
Solo Attorney — Annual Subscription
$6,000/year ($500/month)
Small Firm — Annual Subscription + Supplemental Research
for CoCounsel + estimated $900–$1,500/year per attorney for supplemental research
Custom pricing; comparable enterprise Westlaw seats reported at ~$900/month per seat
Enterprise — Custom-Quoted