Luminance
Reviews and negotiates contracts using purpose-trained legal models.
Full Luminance record →Head to head
Luminance vs Spellbook
Luminance (Luminance) and Spellbook (Spellbook) both sit in Legal. Spellbook shipped more tracked changes in the last 30 days (3 vs 2). Every value below comes from the latest crawl of the vendors' own pages.
| Attribute | Luminance Luminance | Spellbook Spellbook |
|---|---|---|
| Segment | Legal | Legal |
| Version | 2026 platform | ACM |
| Entry cost | Pricing is not publicly listed. Request a demo for details. | Pricing is custom and based on the number of team members. A 7-day free trial is available. |
| Pricing tiers | Enterprise free | Law Firms (Spellbook Suite) free |
| Model stack | Luminance Mixture of Experts · Luminance Proprietary Models · Multiple Models / Mixture of Experts · Panel of legal models · Proprietary Legal AI Models · Proprietary Legal-Grade AI Architecture · Proprietary Mixture of Experts (MoE) | GPT5 · Opus |
| Context window | Not published | Not published |
| Public API | ||
| Routes models | ||
| Changes / 30d | 2 | 3 |
| Origin | Global | Global |
| Capabilities | Automated redlining, Contract negotiation, Repository analysis, Divergence detection, Contract Generation, Contract Negotiation, Contract Analysis, Compliance Monitoring | Clause suggestions, Redlining, Risk flagging, Benchmarks, Playbooks, Contract Review, Contract Drafting, Contract Comparison |
Spellbook
Suggests clauses, flags risk and redlines contracts inside Microsoft Word.
Full Spellbook record →