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CoCounsel vs Spellbook

A side-by-side comparison of CoCounsel and Spellbook, two Legal tools, drawn from Ignaite's continuously-verified listings.

Compared from listings verified as of

CoCounsel

Legal

AI legal assistant grounded in Thomson Reuters content.

View CoCounsel

Spellbook

Legal

AI contract drafting and review, inside Microsoft Word.

View Spellbook

At a glance

Feature comparison of CoCounsel and Spellbook
AttributeCoCounselSpellbook
CategoryLegalLegal
PricingPAIDPAID
LicenseProprietaryProprietary
DeploymentCloudCloud
PlatformsWebWeb
Model supportMulti-modelMulti-model
Vendor (differs)Thomson ReutersRally Legal (Spellbook)

The honest brief

CoCounsel

Grounds answers in licensed Westlaw and Practical Law content, so cites are verifiable rather than open-web guesses.

  • Research, contract analysis, and drafting
  • Integrates into Microsoft 365 workflows
  • Prompts not used to train models
  • Expensive enterprise pricing
  • Not a standalone product
  • US-centric legal coverage

Spellbook

Runs entirely as a Microsoft Word add-in, so drafting and redlining happen in the document lawyers already work in.

  • Native Microsoft Word add-in
  • Clause benchmarking + playbook review
  • Early generative-AI legal tool (2022)
  • Multi-model (GPT, Claude)
  • Paid-only, no free tier
  • Tied to the Word workflow
  • Less suited to litigation/research