If you’re considering moving off Harvey, the trigger is usually one of two things: pricing has scaled past what your firm or in-house team can justify, or the workflow fit isn’t matching how your lawyers actually work. Harvey is the most-deployed legal AI platform in BigLaw and large in-house teams in 2026, but the alternatives have credible claims for specific motions.
Casetext (Thomson Reuters CoCounsel)
The legal research-anchored alternative, now part of Thomson Reuters. CoCounsel’s strength is the integration with Westlaw and the research-to-drafting pipeline; Harvey is broader but Casetext is deeper on the research side. For research-heavy practices (litigation, appellate, regulatory), Casetext is often the more practical tool.
Migrate from Harvey to Casetext when: your firm’s actual high-value AI use cases are research and brief-drafting, you’re already a Westlaw shop, and the integration with Westlaw matters more than the breadth of Harvey’s workflow features.
Don’t migrate when: your motion is transactional (M&A, fund formation, contracts) where Harvey’s drafting and review tools fit the workflow better than Casetext’s research-first approach.
Spellbook
The CLM-adjacent contract drafting tool that’s a different shape from Harvey. Spellbook lives inside Word and focuses on contract drafting and review specifically — narrower than Harvey but deeper in that workflow. For teams whose Harvey usage is 80% contract work, Spellbook covers the same job at a fraction of the cost.
Migrate from Harvey to Spellbook when: your Harvey usage is overwhelmingly contract drafting, your lawyers live in Word, and you don’t use Harvey’s research or workflow-orchestration features. The cost delta is significant and the workflow fit is often better.
Don’t migrate when: your firm has multi-practice usage (litigation, transactional, regulatory) and Harvey is the shared layer.
LexisNexis Protégé
The Lexis-anchored alternative for firms already on the Lexis ecosystem. Protégé covers research, drafting, and analysis with the Lexis citator and database depth as the foundation. Comparable to Casetext-on-Westlaw but on the Lexis side.
Migrate from Harvey to Protégé when: you’re a Lexis shop and the integration depth with Lexis databases matters more than Harvey’s broader workflow. Don’t migrate when: you’re not a Lexis shop — the integration is the value.
Stay on Harvey when
Your firm has multi-practice usage of legal AI and Harvey is the shared layer
You depend on Harvey’s workflow tooling (matter-level orchestration, custom agents) that the narrower alternatives don’t replicate
You’re a BigLaw firm or large in-house team where the support and roadmap velocity justify the price
Your Harvey rollout is in active expansion across practices
Verdict
Casetext is the right migration for ~25% — research-heavy practices already on Westlaw
Spellbook is right for ~20% — contract-dominant usage where the cost math is decisive
Protégé is right for ~10% — Lexis-anchored shops
Staying on Harvey is the right answer for ~45% — multi-practice firms where Harvey is load-bearing
The single mistake to avoid: switching legal AI vendors mid-rollout because of feature envy. The roadmap delta closes faster than the migration recovers.
If you’re considering moving off Harvey, the trigger is usually one of two things: pricing has scaled past what your firm or in-house team can justify, or the workflow fit isn’t matching how your lawyers actually work. Harvey is the most-deployed legal AI platform in BigLaw and large in-house teams in 2026, but the alternatives have credible claims for specific motions.
Casetext (Thomson Reuters CoCounsel)
The legal research-anchored alternative, now part of Thomson Reuters. CoCounsel’s strength is the integration with Westlaw and the research-to-drafting pipeline; Harvey is broader but Casetext is deeper on the research side. For research-heavy practices (litigation, appellate, regulatory), Casetext is often the more practical tool.
Migrate from Harvey to Casetext when: your firm’s actual high-value AI use cases are research and brief-drafting, you’re already a Westlaw shop, and the integration with Westlaw matters more than the breadth of Harvey’s workflow features.
Don’t migrate when: your motion is transactional (M&A, fund formation, contracts) where Harvey’s drafting and review tools fit the workflow better than Casetext’s research-first approach.
Spellbook
The CLM-adjacent contract drafting tool that’s a different shape from Harvey. Spellbook lives inside Word and focuses on contract drafting and review specifically — narrower than Harvey but deeper in that workflow. For teams whose Harvey usage is 80% contract work, Spellbook covers the same job at a fraction of the cost.
Migrate from Harvey to Spellbook when: your Harvey usage is overwhelmingly contract drafting, your lawyers live in Word, and you don’t use Harvey’s research or workflow-orchestration features. The cost delta is significant and the workflow fit is often better.
Don’t migrate when: your firm has multi-practice usage (litigation, transactional, regulatory) and Harvey is the shared layer.
LexisNexis Protégé
The Lexis-anchored alternative for firms already on the Lexis ecosystem. Protégé covers research, drafting, and analysis with the Lexis citator and database depth as the foundation. Comparable to Casetext-on-Westlaw but on the Lexis side.
Migrate from Harvey to Protégé when: you’re a Lexis shop and the integration depth with Lexis databases matters more than Harvey’s broader workflow. Don’t migrate when: you’re not a Lexis shop — the integration is the value.
Stay on Harvey when
Verdict
The single mistake to avoid: switching legal AI vendors mid-rollout because of feature envy. The roadmap delta closes faster than the migration recovers.