kitio.aiLuminance vs Definely
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Luminance starts at See pricing page and Definely starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- AI contract negotiation
- Clause anomaly detection
- Word integration
- Contract repository
- Due diligence review
- Defined term lookup
- Contract proofreading
- Comparison against precedent
- Natural-language clause search
- Issues lists and reports
- MCP for AI assistants
| Feature | Luminance | Definely |
|---|---|---|
| Best for | Legal-grade AI for contract negotiation, review and management | Contract review and proofreading for lawyers, inside Word and AI tools |
| Category | Legal, finance & HR | Legal, finance & HR |
| Pricing model | Paid | Paid |
| Starting price | See pricing page | See pricing page |
| Free plan | No | No |
| Made by | Luminance | Definely |
| Based in | United Kingdom | United Kingdom |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Luminance starts at See pricing page and Definely starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Luminance
- Strong multilingual review
- Proprietary legal models
- Covers firm and in-house use
- Enterprise pricing only
- Interface takes time to learn
- Autonomous features need oversight
Definely
- Works inside Microsoft Word
- Every finding traced to its source
- Connects to Claude and ChatGPT
- No public pricing
- Demo needed before access
- Built for large law firms
Which one should you choose?
Choose Luminance if you want:
- Strong multilingual review
- Proprietary legal models
- Covers firm and in-house use
Watch out: enterprise pricing only.
Choose Definely if you want:
- Works inside Microsoft Word
- Every finding traced to its source
- Connects to Claude and ChatGPT
Watch out: no public pricing.
Luminance vs Definely FAQ
What is the difference between Luminance and Definely?
Luminance: Legal-grade AI for contract negotiation, review and management. Definely: Contract review and proofreading for lawyers, inside Word and AI tools. Both are legal, finance & hr tools.
Is Luminance or Definely cheaper?
Luminance starts at See pricing page and Definely starts at See pricing page. Check both pricing pages for current plans.
Do Luminance and Definely have free plans?
Luminance: No. Definely: No.
Who makes Luminance?
Luminance is made by Luminance, based in United Kingdom.
Who makes Definely?
Definely is made by Definely, based in United Kingdom.
Which should I choose, Luminance or Definely?
Choose Luminance if you value strong multilingual review and proprietary legal models. Choose Definely if you value works inside microsoft word and every finding traced to its source.