LexDraft vs Luminance
Quick Answer
Luminance is the better choice if you're a large law firm or in-house team running M&A due diligence, contract analysis at scale, or matter-level corpus review — Luminance (founded out of Cambridge in 2015) was a pioneer in unsupervised ML for legal documents and has expanded into AI-assisted drafting with their "Lumi" assistant. LexDraft is the better choice if you're a solo, small firm, or in-house counsel team who wants Word-native AI for drafting and reviewing one document at a time — surgical edits, attorney-authored playbooks ready to go, citation verification — without committing to an enterprise platform.
Last updated: June 2026
Enterprise legal AI platform (analysis + drafting) vs Word-native drafting assistant
Honest Feature Comparison
Luminance has expanded from its roots in document analysis into AI drafting. LexDraft has always been a focused drafting tool. The table shows where the products overlap and where each one wins.
| Dimension | LexDraft | Luminance |
|---|---|---|
| Product category | AI drafting assistant (Word add-in) | Enterprise legal AI platform (analysis + drafting) |
| Target buyer | Solo, small firm, in-house counsel | AmLaw / Magic Circle firms, large in-house teams |
| Free tier | ✓ Yes — 2,000 words/month | ✗ No (sales-led, demo required) |
| Published pricing | $0 / $99 / $199 per month per user | Not publicly disclosed — typically $50K–$300K+ annual |
| Document analysis at scale (data rooms) | ✗ No | ✓ Core strength — unsupervised ML clustering |
| M&A due diligence workflow | ✗ No | ✓ Yes — major use case |
| AI drafting (clause-level) | ✓ Core feature | ✓ Yes — Lumi assistant + Word add-in |
| Surgical word-level edits | ✓ Yes — preserves formatting and defined terms | ○ Paragraph-level rewrites typical |
| Attorney-authored playbooks ready to go | ✓ 4 free (NDA, MSA, DPA, Services) | ✓ Firm-configured |
| Citation verification (CourtListener) | ✓ Yes — ✓/⚠ badges | ✗ No |
| Native Word integration | ✓ Yes — primary surface | ○ Word add-in available; web app primary |
| SOC 2 Type II | ✗ Not yet (TLS + zero retention) | ✓ Yes (ISO 27001 also) |
| Implementation | 2 minutes from AppSource | 2–6 months typical for enterprise deployment |
When Luminance is the right answer
Honest scenarios where Luminance is the better fit:
You're running M&A diligence on data rooms
Luminance's unsupervised-learning clustering surfaces unusual or non-standard clauses across thousands of contracts. That's the original product, and it's still a real strength. LexDraft does not address this use case.
You want analysis + drafting in one platform
Luminance has built a unified workflow where you can analyze a corpus, identify exceptions, then draft amendments in the same tool. If your matters require this integrated flow, Luminance has it; LexDraft is drafting-only.
You're a Magic Circle / AmLaw firm with enterprise procurement
Luminance is built for firms with formal procurement, security review, and a willingness to commit to a six-figure annual contract. SOC 2 Type II and ISO 27001 are already in place.
When LexDraft is the right answer
You don't do M&A diligence or corpus-level analysis
If your daily work is one contract at a time, Luminance's analytical core is capability you won't use. LexDraft is shaped for individual-document review and drafting.
You want a tool tonight, not in six months
Luminance enterprise deployments take months. LexDraft installs from AppSource in two minutes. Free tier handles your first contract immediately.
You want surgical word-level edits
LexDraft identifies the exact 3–12 word span that should change and applies a tracked change just to that span. Useful when you've negotiated language you don't want auto-improved.
Your budget is four figures, not six
LexDraft Pro at $99/user/month is sized for solo and small-firm budgets. Luminance is sized for AmLaw and Magic Circle deployments.
Pricing comparison
LexDraft (public pricing)
Free
$0 / month
2,000 words/month
Pro
$99 / month per user
100K words/month · $990/year (15% off)
Enterprise
$199 / month per user
Unlimited ·
$199 / month per user
Unlimited,990/year (15% off)
Luminance (sales-led)
All tiers
Contact sales
Pricing not publicly disclosed. Industry reporting and reseller conversations put Luminance annual contracts in the $50K–$300K+ range depending on user count, modules (Discovery, Diligence, Corporate, Lumi), and matter volume.
Migration guidance: these tools coexist
Luminance and LexDraft solve overlapping but distinct problems. The realistic frame is "use both for what each one is best at."
Use Luminance for data-room and corpus work
Document clustering, exception detection across thousands of contracts, M&A diligence workflows.
Use LexDraft for individual-document drafting in Word
When a partner is staring at one NDA, LexDraft's surgical edits and playbook checks make that single document faster to ship.
Reassess at renewal
If your team has shifted away from M&A diligence and toward transactional drafting, the case for the full Luminance contract may have weakened. Look at usage before renewing.
Frequently Asked Questions
Yes. Luminance for matter-level analysis (data rooms, M&A diligence, corpus searches). LexDraft for individual-document drafting and review in Word. They don't conflict — different stages of legal work.
No. LexDraft works on one document at a time. Luminance's unsupervised ML clustering across thousands of contracts is a capability we don't have and don't try to replicate.
LexDraft Pro for 15 seats is $17,820/year at list price. Luminance for the same headcount, with full modules, typically lands well into the six figures annually based on industry reporting. The two products are not really substitutes for each other — Luminance buyers are usually buying for matter-analytics capability that LexDraft doesn't offer.
Luminance holds SOC 2 Type II, ISO 27001, and is widely deployed in financial-services and regulated environments. LexDraft does not currently hold SOC 2. We use TLS 1.2+ encryption in transit and at rest, and a zero-retention agreement with our model provider — your document content is not used to train models. If SOC 2 is a procurement gate, Luminance clears it and we don't yet.
Lumi has a real strength: it has corpus context from your firm's prior contracts that Luminance has already analyzed. LexDraft works without that context — just the document in front of you, the playbook, and the AI. For firms already on Luminance, Lumi's corpus-aware suggestions can be more tailored. For everyone else, LexDraft is the lighter, more accessible option.
Compare other tools
Try LexDraft for free
2,000 words/month, no credit card. Complements Luminance for in-Word drafting.
Install from Microsoft AppSource →Further reading
- Luminance's official site — for current product scope, modules, and Lumi capabilities.
- ABA Business Law Section — practitioner resources on M&A and corporate transactions.
- CourtListener (Free Law Project) — the open case-law database LexDraft uses to verify citations.