Spellbook vs Casetext
Side-by-side comparison of AI visibility scores, market position, and capabilities
#1 legal AI for contract review and drafting. 4,000+ law firms. $50M Series B (Oct 2025), on track for $100M ARR in 2026. Founded 2018, Toronto. Private.
About
Spellbook is the leading AI platform for transactional lawyers, founded in 2018 by Scott Stevenson, Daniel Maria, and Matt Mayers, headquartered in Toronto, Canada. The platform integrates directly into Microsoft Word and uses frontier LLMs including GPT-5 and Claude to help lawyers review, draft, and negotiate contracts. Key products include Spellbook Associate, the first AI agent for multi-document transactional drafting.
AI legal research platform acquired by Thomson Reuters for $650M; CoCounsel AI integrated into Westlaw for case research, contract review, and deposition analysis.
About
Casetext is an AI legal research platform that pioneered AI-assisted legal research tools for attorneys, law students, and legal professionals before being acquired by Thomson Reuters in August 2023 for $650 million — one of the largest legal tech acquisitions in history. Founded in 2013 in San Francisco by Jake Heller and Pablo Arredondo, Casetext built the CARA AI tool (Context and Relevant Analysis) that analyzes uploaded legal briefs to find relevant case law the attorney may have missed, and CoCounsel — an AI legal assistant powered by GPT-4.
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