Casetext AI vs CoCounsel: Which Is Better for Legal Research
Casetext AI vs CoCounsel compared in depth: features, pricing, research accuracy, and how the Thomson Reuters acquisition reshaped both tools.
Published · Reviewed by AttorneyAITools editorial
Casetext AI vs CoCounsel: Which Is Better for Legal Research
Casetext AI and CoCounsel share unusual DNA. Thomson Reuters acquired Casetext in 2023 largely to absorb the CoCounsel product and integrate it with Westlaw. In 2026, both brands still exist in the market, but they serve different audiences. This comparison clarifies the practical differences so you can choose the right license.
Quick Verdict
CoCounsel is the flagship offering for firms that want the full Thomson Reuters experience, including Westlaw integration, Practical Law content, and enterprise support. Casetext AI, where it is still sold as a standalone, is a leaner product better suited to solo practitioners and small firms that do not need the full Westlaw stack. For most firms, CoCounsel is the correct modern choice.
Head-to-Head Comparison Table
| Feature | Casetext AI | CoCounsel |
|---|---|---|
| Product status | Legacy / small-firm edition | Flagship Thomson Reuters product |
| Research source | Casetext database (CARA) | Westlaw + Practical Law |
| Skill library | Core skills | Full skills suite |
| KeyCite integration | Limited | Full |
| Starting price | ~$110/user/month | ~$225/user/month |
| Target market | Solo, small firm | Mid to large firm |
| Document review | Yes | Yes, enhanced |
| Deposition prep | Basic | Advanced |
| Contract analysis | Basic | Full Practical Law playbooks |
| Updates | Maintenance mode | Active roadmap |
| Support | Standard | Enterprise SLAs |
| Training | Self-serve | Live enablement |
When to Choose Casetext AI
Choose Casetext AI when you are a solo practitioner or a two-lawyer firm that needs AI-assisted research without the cost of a full Westlaw subscription. The legacy Casetext database still covers federal and state primary law adequately for most civil practice areas, and the core skills cover basic research memos, document summarization, and timeline generation.
When to Choose CoCounsel
Choose CoCounsel when you want the complete Thomson Reuters ecosystem. CoCounsel inherits every advantage of Westlaw, including KeyCite citator verification, Practical Law secondary materials, and the most comprehensive primary law database in the industry. New features and skills ship to CoCounsel first, and enterprise firms receive dedicated support.
Pricing Breakdown
Casetext AI legacy pricing sits around $110 per user per month for solo plans, scaling to $165 for small firms.
CoCounsel is priced at roughly $225 to $500 per user per month depending on volume and whether Westlaw access is bundled. Existing Westlaw customers usually receive preferential pricing that makes CoCounsel incrementally affordable.
Casetext AI Pros and Cons
Pros:
- Affordable entry point for solos
- Familiar interface for existing Casetext users
- No Westlaw subscription required
- Core skills adequate for most civil matters
- Simple self-serve onboarding
Cons:
- Maintenance-mode product with fewer updates
- Limited secondary materials
- Weaker citator than KeyCite
- Missing advanced skills
- Sunset risk over the next 24 months
CoCounsel Pros and Cons
Pros:
- Full Westlaw and Practical Law integration
- Active development roadmap
- Enterprise-grade support and SLAs
- Advanced skills including deposition prep
- KeyCite citation verification
Cons:
- Higher cost, especially without existing Westlaw
- Enterprise sales process for larger firms
- Can feel heavyweight for solos
- Requires more onboarding time
- Tighter vendor lock-in
Final Recommendation
If you are already a Westlaw customer, upgrading to CoCounsel is a no-brainer. If you are a solo running lean on tooling, Casetext AI's legacy pricing may still be the most cost-effective way to bring AI research into your practice. Be aware that Thomson Reuters is expected to gradually migrate all Casetext customers to CoCounsel by 2027, so new buyers should plan for that transition.
Frequently Asked Questions
Is Casetext still being developed? Casetext AI as a standalone brand is largely in maintenance mode. Active development happens inside CoCounsel.
Will my Casetext subscription be forced to migrate? Thomson Reuters has signaled eventual migration but has not announced a hard deadline. Expect phased transitions through 2027.
Can I get CoCounsel without Westlaw? Yes, but you lose most of its value. CoCounsel's differentiator is Westlaw grounding and KeyCite integration.
Which tool is faster? CoCounsel is slightly slower per query due to KeyCite verification passes, but the accuracy gains justify the extra seconds.
Which tool is better for litigation? CoCounsel, by a wide margin, thanks to its advanced deposition prep, timeline, and brief analysis skills.