kitio.aiLumin vs Kairos
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Lumin has the lower starting price: about $9 a month, against $49 for Kairos.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- AI agreement generator
- AI agreement editor
- PDF editing
- E-signatures
- Fillable PDFs
- eSign API
- Selfie-to-ID verification
- Face recognition API
- Real-time image processing
- On-premise deployment
- Free API tier
| Feature | Lumin | Kairos |
|---|---|---|
| Best for | PDF editing, e-signing and AI agreement drafting in one workspace | Face-based identity verification and recognition API |
| Category | Legal, finance & HR | Legal, finance & HR |
| Pricing model | Freemium | Freemium |
| Starting price | $9/mo | $49/mo |
| Free plan | Yes | Yes |
| Made by | Lumin | Kairos |
| Based in | – | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Lumin has the lower starting price: about $9 a month, against $49 for Kairos.
Free plan
Cheapest paid plan
Top plan
Free trial
5 plans
Free
Free
- Basic PDF editing
- Basic e-signatures
- Annotate up to 3 docs
Starter
$9/mo
- Student plan
- 10 docs per month
- Google integration
Pro
$19/mo
- Per team
- 200 docs per month
- Advanced PDF editing
- 5 agreements per month
Business
$99/mo
- Member access control
- Domain control
- Slack and Drive connectors
- Priority support
Enterprise
Contact sales
- Enterprise SSO
- Storage options
- Premium onboarding
3 plans
Free
Free
- 100 identity verification calls
- No credit card
IDV Pro
$49/mo
- Includes 100 API calls
- Full biometric identity verification
- Price drops with volume
On-Prem
Contact sales
- Face recognition on your servers
Prices in USD, checked Nov 5, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Lumin
- Drafting, editing and signing in one place
- Free plan covers basic PDF work
- Covers many common contract types
- Free plan allows only 3 documents a month
- Pro limits agreements to 5 per month
- Pro pricing is per team, with caps on documents
Kairos
- Free calls to test before paying
- Can be installed on-premise
- Volume discounts on transactions
- Pro plan includes only 100 calls
- Face data raises privacy duties
- Few details on supported SDKs
Which one should you choose?
Choose Lumin if you want:
- Drafting, editing and signing in one place
- Free plan covers basic PDF work
- Covers many common contract types
Watch out: free plan allows only 3 documents a month.
Choose Kairos if you want:
- Free calls to test before paying
- Can be installed on-premise
- Volume discounts on transactions
Watch out: pro plan includes only 100 calls.
Lumin vs Kairos FAQ
What is the difference between Lumin and Kairos?
Lumin: PDF editing, e-signing and AI agreement drafting in one workspace. Kairos: Face-based identity verification and recognition API. Both are legal, finance & hr tools.
Is Lumin or Kairos cheaper?
Lumin has the lower starting price: about $9 a month, against $49 for Kairos.
Do Lumin and Kairos have free plans?
Lumin: Yes. Kairos: Yes.
Who makes Lumin?
Lumin is made by Lumin.
Who makes Kairos?
Kairos is made by Kairos, based in United States.
Which should I choose, Lumin or Kairos?
Choose Lumin if you value drafting, editing and signing in one place and free plan covers basic pdf work. Choose Kairos if you value free calls to test before paying and can be installed on-premise.