I
ILuminance vs Spellbook
Pricing, features, platforms and who each one suits — side by side.
L
Choose Luminance if…
- you're in its core audience: in-house legal teams, procurement teams
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 Luminance 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 complianceISO 27001, SOC 2 Type IISOC 2 Type II, HIPAA, GDPR, CCPA
Word add-in—
AI redlining—
Custom playbooks—
Contract repository
PlatformsWebWeb
CategoryLegalLegal
CompanyLuminanceDialog Enterprises Inc.
Based in——
Founded——
Part of——
Key features
L Luminance
- Playbook and precedent-based contract review
- AI-assisted contract negotiation
- Portfolio-wide search of risk, obligations and renewals
- Contract repository
- Connected workflows from intake to signature
- Document search engine for contracts
- Luna assistant for contract questions
- Detection of auto-renewals and commercial opportunities
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.
Luminance
Contact for pricing. Plan details aren't published.
Spellbook
Law FirmsCustom
In-House TeamsCustom
Strengths and limitations
Luminance
- ISO 27001 certified and SOC 2 Type II examined
- Built for use across many departments, not only legal
- Covers negotiation, repository and workflows in one platform
- Says it is trusted by more than 1,000 enterprises
- No public pricing; demo request required
- No free plan or trial listed
- Aimed at enterprises rather than individuals or small teams
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
II
Contact
H
HH
Contact
L
LL
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
W
WW
Contact
C
CC
Contact
Built from each vendor's public website; we haven't tested them hands-on. Editorial policy