Disclosure: Legal AI Reviews is reader-supported. Some links on this site may be affiliate links, which means we may earn a commission at no extra cost to you. We have not tested the products in this article hands-on. This article was drafted with AI assistance from vendor documentation, public pricing pages, product announcements, and published third-party reviews. Features and pricing change frequently, so confirm current details with the vendor before you buy. How we research and review.
Update (October 2026): Thomson Reuters now sells CoCounsel as CoCounsel Legal, which comes with Westlaw Advantage, Practical Law and CoCounsel Essentials, and also sells CoCounsel Essentials on its own.
Quick Comparison Table
| Category | Paxton AI | CoCounsel |
|---|---|---|
| Best for | Solo attorneys, small firms | Mid-size to large firms, in-house |
| Starting price | $499 per user/month, or $2,999 per user/year (Individual plan) | Online pricing for firms with 1–10 attorneys; larger firms get a quote |
| Legal research database | AI-based (no direct Westlaw link) | Westlaw-backed (Thomson Reuters) |
| Research accuracy (published) | 94% (self-reported, Stanford methodology) | Not independently benchmarked |
| Hallucination risk | Moderate — attorney verification required | Lower — database-grounded responses |
| Contract review | Yes | Yes |
| Deposition preparation | No | Yes |
| Document review | Limited | Yes (enterprise feature) |
| Free trial | Yes | Available for qualifying accounts |
| Self-service signup | Yes | Online pricing for firms with 1–10 attorneys |
| Enterprise sales required | No (Individual plan) | For firm-wide contracts |
| Support | Email + community | Enterprise support tiers |
CoCounsel Overview
CoCounsel is Thomson Reuters’ AI legal assistant, built on the foundation of Casetext technology acquired in 2023 for $650 million. It is powered by the Westlaw legal database — one of the most comprehensive legal databases in the world — and uses GPT-4 class models fine-tuned for legal applications.
By 2025, CoCounsel had reached one million users across law firms of all sizes and in-house legal departments. The Thomson Reuters backing gives CoCounsel research capabilities that independent AI tools cannot easily replicate: when CoCounsel cites a case, it is pulling from Westlaw’s verified primary source database rather than training data alone.
Core capabilities:
- AI-powered legal research (Westlaw-backed)
- Document drafting and legal writing
- Contract review and analysis
- Deposition preparation and transcript analysis
- Document review for litigation
- Matter summarization
What makes CoCounsel stand out:
The Westlaw integration is the defining technical advantage. CoCounsel’s research responses are grounded in verified primary sources, which significantly reduces the hallucination risk that affects standalone AI tools. For firms where research accuracy and citation reliability are non-negotiable, this is decisive.
Document Drafting
Paxton AI: Paxton drafts legal documents across a broad range: briefs, motions, memos, contracts, demand letters, and pleadings. The output is solid for solo and small firm needs. Because Paxton is designed for practitioners without large support staff, the drafting interface is streamlined and does not assume access to template libraries or document management systems.
CoCounsel: CoCounsel drafts at a comparable quality level with the additional advantage of tighter Westlaw integration — it can incorporate recent legal developments into drafts more reliably. The platform also supports more complex document workflows suited to larger firm environments.
Winner: Tie — both produce competent drafting output. CoCounsel has a slight edge in research-integrated drafting; Paxton AI has a simpler interface better suited to individual practitioners working without support staff.
Pricing
Paxton AI:
| Plan | Price |
|---|---|
| Individual | $499 per user/month, or $2,999 per user/year (billed annually) |
| Enterprise | Custom volume-based pricing |
Paxton publishes pricing and allows self-service signup. A solo attorney can be using the platform within an hour of deciding to try it.
CoCounsel:
| Plan | Price |
|---|---|
| CoCounsel Essentials, Westlaw Advantage with CoCounsel Essentials, or CoCounsel Legal (firms with 1–10 attorneys) | Online pricing linked from Thomson Reuters’ plans page |
| Firms with more than 10 attorneys | Contact a Thomson Reuters sales rep for a quote |
Thomson Reuters links to online CoCounsel pricing for firms with 1–10 attorneys, so small firms can see prices without going through an enterprise sales process. Firms already paying for Westlaw subscriptions frequently receive CoCounsel access at significantly reduced incremental cost through bundle pricing — this is a major factor for firms already in the Thomson Reuters ecosystem.
Winner: Paxton AI — Paxton publishes its prices and offers self-service signup with a 7-day free trial. For firms already on Westlaw, CoCounsel’s bundle pricing can make it the better value.
Support and Training
Paxton AI: Paxton offers email-based support and community resources. Given its target market of solo practitioners, the product is designed to be self-service and does not require extensive onboarding.
CoCounsel: CoCounsel offers tiered support, with enterprise accounts receiving dedicated customer success management. Thomson Reuters’ training resources and legal technology support infrastructure are more robust.
Winner: CoCounsel — Thomson Reuters’ enterprise support infrastructure is significantly more developed.
Who Should Choose CoCounsel?
CoCounsel is the right choice for attorneys and organizations in the following situations:
Firms already paying for Westlaw. The bundle pricing makes CoCounsel an obvious consideration for any firm already in the Thomson Reuters ecosystem. The incremental cost is often favorable, and the Westlaw integration delivers meaningful research quality advantages.
Firms or teams where citation accuracy is non-negotiable. For attorneys who file research in court, advise on significant transactions, or operate in contexts where an AI citation error has serious consequences, CoCounsel’s Westlaw-grounded responses materially reduce hallucination risk compared to standalone AI tools.
Mid-size and larger law firms. CoCounsel’s enterprise features — playbook contract review, deposition preparation, document review, matter summarization — are designed for the workflows of firms with support staff and structured matter management.
In-house legal teams. CoCounsel has invested in in-house counsel features and has substantial traction in corporate legal departments, particularly where Thomson Reuters’ existing enterprise relationships smooth the procurement process.
Attorneys who need deposition preparation tools. Paxton AI does not offer deposition preparation. If this is a meaningful part of your practice, CoCounsel (or tools like Legora) are the better options.
Frequently Asked Questions
Is Paxton AI a good Casetext alternative?
Yes. Paxton AI is widely considered one of the best Casetext alternatives for solo and small firm attorneys. It is accessible, affordable, and designed for individual practitioners rather than large enterprises — similar to Casetext’s original positioning.
Is CoCounsel the same as Casetext?
CoCounsel is the product Thomson Reuters built after acquiring Casetext in 2023. It incorporates Casetext’s technology and absorbed the Casetext user base, but CoCounsel is a substantially expanded and rebranded product with deeper Westlaw integration and more enterprise features. It is not a like-for-like replacement in terms of pricing and positioning.
How accurate is Paxton AI for legal research?
Paxton AI has published a 94% accuracy rate on legal research tasks using Stanford-methodology testing — an unusual level of transparency for legal AI vendors. In practice, this means attorney verification of citations remains necessary. It is a capable research tool, but attorneys should not rely on any AI research output without verification before filing.
Does CoCounsel replace Westlaw?
No. CoCounsel is an AI assistant that works with Westlaw; it does not replace the Westlaw subscription. Firms using CoCounsel typically maintain their Westlaw access and use CoCounsel as the AI interface layer over that database.
What is the price difference between Paxton AI and CoCounsel?
Paxton AI’s Individual plan costs $499 per user per month, or $2,999 per user per year billed annually, and its Enterprise pricing is custom and volume-based. Thomson Reuters links to online CoCounsel pricing for firms with 1–10 attorneys and asks firms with more than 10 attorneys to contact a sales rep, so compare current quotes before deciding.
Can Paxton AI handle litigation research?
Paxton AI can perform litigation research across federal and state jurisdictions, including case law lookup, statute research, and legal memo drafting. Its research accuracy is solid (94% by its own benchmark), but for practices where citation precision is critical, CoCounsel’s Westlaw-grounded research provides stronger reliability guarantees.
Which tool is better for in-house counsel?
Neither Paxton AI nor CoCounsel is primarily designed for in-house counsel, though CoCounsel has more in-house features. For corporate legal departments, consider also evaluating tools specifically built for in-house workflows. See our review of GC AI for a purpose-built in-house counsel option.
Is there a free trial for either tool?
Paxton AI offers a free trial that allows you to evaluate the platform before committing. CoCounsel offers trial access for qualifying accounts. Check each product’s website for current trial availability.