If you’re considering moving off Spellbook, the reason is usually that your firm’s needs have outgrown the in-Word contract-drafting model — you need broader legal AI coverage, deeper review workflows, or matter-level orchestration that Spellbook’s narrow focus doesn’t provide. Spellbook remains the best in-Word drafting AI for transactional lawyers in 2026, but the upmarket migration question is real.
Harvey
The full-suite migration. Harvey covers contract drafting, but also research, regulatory analysis, and matter-level workflow orchestration. For firms whose AI use cases have expanded beyond drafting, Harvey is the natural destination — at a meaningfully higher price point.
Migrate from Spellbook to Harvey when: your AI usage has expanded across practice areas, your firm has the budget for BigLaw-tier legal AI, and your IT/InfoSec function is ready for an enterprise rollout. Multi-practice firms generally end up here.
Don’t migrate when: your usage is still 90% contract drafting in Word. The cost increase won’t be justified by features your lawyers don’t use.
Casetext (Thomson Reuters CoCounsel)
The research-anchored alternative for firms whose unmet need is legal research and brief-drafting rather than transactional contract work. Casetext’s Westlaw integration is the differentiator; Spellbook doesn’t credibly cover the research motion.
Migrate from Spellbook to Casetext when: your firm’s center of gravity is litigation or regulatory work, you’re already on Westlaw, and the Spellbook contract focus was a mismatch from the start.
Don’t migrate when: your firm is transactional. Casetext’s brief-drafting strength doesn’t help with M&A or contract review motions.
Stay on Spellbook when
Your firm or team is transactional-focused (M&A, fund formation, contracts, employment)
Your lawyers live in Word and the in-document workflow is the actual reason adoption stuck
You don’t have multi-practice AI needs that justify a broader platform
The price-per-seat is letting you deploy AI broadly across the contract-touching team
For these firms, Spellbook’s narrowness is a feature, not a limitation.
Verdict
Harvey is the right migration for ~25% — multi-practice firms whose AI footprint has grown
Casetext is right for ~10% — firms whose center of gravity was always research, and Spellbook was the wrong starting point
Staying on Spellbook is the right answer for ~65% — transactional firms where the in-Word focus is exactly the right shape
The single mistake to avoid: upgrading to a full-suite legal AI platform to chase features the rest of your firm won’t actually use. Most firms don’t need Harvey breadth.
If you’re considering moving off Spellbook, the reason is usually that your firm’s needs have outgrown the in-Word contract-drafting model — you need broader legal AI coverage, deeper review workflows, or matter-level orchestration that Spellbook’s narrow focus doesn’t provide. Spellbook remains the best in-Word drafting AI for transactional lawyers in 2026, but the upmarket migration question is real.
Harvey
The full-suite migration. Harvey covers contract drafting, but also research, regulatory analysis, and matter-level workflow orchestration. For firms whose AI use cases have expanded beyond drafting, Harvey is the natural destination — at a meaningfully higher price point.
Migrate from Spellbook to Harvey when: your AI usage has expanded across practice areas, your firm has the budget for BigLaw-tier legal AI, and your IT/InfoSec function is ready for an enterprise rollout. Multi-practice firms generally end up here.
Don’t migrate when: your usage is still 90% contract drafting in Word. The cost increase won’t be justified by features your lawyers don’t use.
Casetext (Thomson Reuters CoCounsel)
The research-anchored alternative for firms whose unmet need is legal research and brief-drafting rather than transactional contract work. Casetext’s Westlaw integration is the differentiator; Spellbook doesn’t credibly cover the research motion.
Migrate from Spellbook to Casetext when: your firm’s center of gravity is litigation or regulatory work, you’re already on Westlaw, and the Spellbook contract focus was a mismatch from the start.
Don’t migrate when: your firm is transactional. Casetext’s brief-drafting strength doesn’t help with M&A or contract review motions.
Stay on Spellbook when
For these firms, Spellbook’s narrowness is a feature, not a limitation.
Verdict
The single mistake to avoid: upgrading to a full-suite legal AI platform to chase features the rest of your firm won’t actually use. Most firms don’t need Harvey breadth.