H
HLexis+ AI vs Spellbook
Pricing, features, platforms and who each one suits — side by side.
L
Choose Lexis+ AI if…
- you're in its core audience: law firm attorneys, in-house counsel
S
Choose Spellbook if…
- you want to trial it before paying
- you're in its core audience: transactional lawyers, in-house legal teams
Side by side
Feature Lexis+ AI Spellbook
Pricing modelContact for pricingContact for pricing
Starting price——
Free plan
Free trial
API
Open source
Trains AI on your content—No
Data retention—LLM providers don't persist data; Google data kept while library exists
Security and compliance—SOC 2 Type II, HIPAA, GDPR, CCPA
Word add-in—
AI redlining—
Contract repository—
PlatformsWebWeb
CategoryLegalLegal
CompanyLexisNexisDialog Enterprises Inc.
Based inGermany—
Founded1973—
Part ofReed Elsevier—
Key features
L Lexis+ AI
- Protégé AI assistant built for legal professionals
- Legal research summaries grounded in LexisNexis content
- Drafts motions, briefs and transactional documents
- Step-by-step refinement of drafted documents
- Summarizes and analyzes large legal documents
- Secure Vault for uploading documents for AI review
- Connects firm knowledge bases, iManage and SharePoint
- General AI mode with leading AI models
S Spellbook
- Contract redlining with tracked suggestions inside Microsoft Word
- Flags risky and non-standard contract terms
- Drafts clauses and agreements from AI or saved precedents
- Playbooks that apply team standards to every review
- Benchmarks comparing contract terms to industry standards
- Associate agent for multi-document legal matters
- Contract intake from email and Slack (ACM)
- Searchable contract repository with renewal monitoring (ACM)
Plans and prices
From each vendor's site. Prices change — confirm before buying.
Lexis+ AI
Contact for pricing. Plan details aren't published.
Spellbook
Law FirmsCustom
In-House TeamsCustom
Strengths and limitations
Lexis+ AI
- Answers grounded in LexisNexis's own legal content
- Vendor states customer data is never used to train AI models
- Integrates with iManage and SharePoint
- No public pricing; sales contact required
- Product has been renamed Lexis+ with Protégé, which may cause confusion
- Features vary by region
Spellbook
- 7-day free trial, with extended trials possible for larger organizations
- Works inside Microsoft Word
- Zero data retention with LLM providers; SOC 2 Type II, GDPR and HIPAA listed
- Free access for academic institutions
- No public prices; you need to book a demo for a quote
- ACM end-to-end contract management is still in early access
More comparisons
Other options to consider
HH
Contact
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WW
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II
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LL
Contact
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DD
Contact
R
REvidence analysis, legal transcription and drafting for legal and investigative teams
Free, from $25.49/mo
R
Free, from $25.49/mo
R
Evidence analysis, legal transcription and drafting for legal and investigative teams
LegalFree planAPI
Built from each vendor's public website; we haven't tested them hands-on. Editorial policy