Spellbook vs Relativity
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.
Relativity confidentially filed for IPO in early 2026, the first legal tech company to do so since 2021, while rebranding as a legal data intelligence platform.
About
Relativity was founded in 2001 in Chicago by Andrew Sieja (originally as kCura) and rebranded under its current name in 2017 after its eponymous e-discovery platform became the industry standard. The company serves over 300,000 users in approximately 40 countries, including 198 of the Am Law 200 law firms and the U.S. Department of Justice, processing over 145 billion files through its cloud platform RelativityOne. Valued at $3.6 billion following a 2023 investment round, it plans to invest more than $170 million in R&D in 2025.
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