Casetext CoCounsel vs Spellbook
A detailed comparison to help you choose between Casetext CoCounsel and Spellbook.
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Verdict: Spellbook wins
Spellbook scores 4.1/5, edging out Casetext CoCounsel at 3.1/5. Transactional lawyers and in-house counsel who draft and negotiate contracts in Microsoft Word and want AI review, redlining and benchmarks without an enterprise platform budget.
Casetext CoCounsel AI legal research and drafting | Spellbook AI contract review in Microsoft Word | |
|---|---|---|
| Rating | 3.1 (1 review) | 4.1 (1 review) |
| Pricing Model | paid | paid |
| Starting Price | From $225/mo | From $99/mo |
| Best For | US law firms of five or more attorneys already invested in Westlaw or Practical Law that want AI research and drafting inside that ecosystem. | Transactional lawyers and in-house counsel who draft and negotiate contracts in Microsoft Word and want AI review, redlining and benchmarks without an enterprise platform budget. |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | team features | team features |
| Visit Casetext CoCounsel → | Visit Spellbook → |
Casetext CoCounsel
Pros
- + Citations in my checks resolved to real documents in the account library, with KeyCite treatment signals attached
- + Task-shaped outputs (research memos, obligation logs, timelines) rather than raw chat
- + Word drafting anchored to Practical Law precedent cut my NDA first-draft time to about 15 minutes
- + Document review reliably handles first-pass summarisation and clause extraction
- + Bundled Westlaw and Practical Law access removes the tab-switching that slows legal research
Cons
- - Standalone Casetext was retired on 2025-04-01; you cannot buy the old product at any price
- - No self-serve trial or published list price — everything routes through a configurator or sales call
- - Estimated $293/seat/month floor for the entry tier (Spellbook's configurator read, June 2026), roughly 30% above the old $225 standalone price
- - US law is the centre of gravity; most of the value evaporates for non-US practice
- - Missed a cross-reference in a lease amendment during my document review test — human review still required
Spellbook
Pros
- + Review pass marked up a 40-page services agreement with seven specific risk flags and usable one-click redlines in under fifteen minutes in my test
- + Benchmarks positions against market-standard language — negotiation context I expected to underuse and now rely on
- + Lives inside Microsoft Word, so lawyers keep their documents, styles and workflow; no new platform to learn
- + Playbooks turn individual review habits into repeatable team standards, which is what makes it a firm tool rather than a personal one
- + Far below Harvey-class pricing in every third-party comparison, with SOC 2 Type II and zero-data-retention terms on the trust side
Cons
- - No published rate card — third-party estimates scatter from $89 to $350 per user per month, so budgeting requires a sales conversation
- - Word-only: no web app, no Google Docs support, which excludes Google Workspace shops entirely
- - Suggested replacement language skewed conservative on a bespoke indemnity structure and needed rewriting
- - Sidebar slowed on document switching and one long exhibit in my test — heavy-document users should trial their worst case
- - Associate (multi-document agent) is new as of the 2026 expansion and should be piloted before trusting it with real diligence volume
Frequently Asked Questions
Which is better, Casetext CoCounsel or Spellbook?▼
Spellbook scores higher at 4.1/5 vs 3.1/5 for Casetext CoCounsel, making it the better-rated option in our comparison.
What is the difference between Casetext CoCounsel and Spellbook?▼
Casetext CoCounsel: CoCounsel Legal is Thomson Reuters' AI assistant for lawyers, used for legal research, reviewing and summarising documents, and drafting. Formerly Casetext; sold per user. Spellbook: AI contract drafting and review tool that works directly inside Microsoft Word to suggest, review, and redline contracts.
Is Casetext CoCounsel or Spellbook more affordable?▼
Casetext CoCounsel starts at €225/mo, Spellbook starts at €99/mo. Check the comparison table above for current pricing.
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