Kairos Instant Identity Verification powered by AI

What is Kairos and what does it do?

Kairos is the most affordable and developer-friendly identity verification API on the market. Founded in 2012 and headquartered in Miami, it combines document scanning (4000+ ID types from 200+ countries), biometric face matching, passive liveness detection, and fraud checks in a single API call that returns results in seconds. Over 1 billion transactions processed for 1000+ businesses. Free tier with 100 API calls, self-serve signup, no sales calls required.

How does Kairos identity verification work?

Kairos performs full identity verification in ONE API call — unlike competitors that require orchestrating multiple separate endpoints. A single POST request with an ID document image and selfie triggers four checks simultaneously: (1) AI-powered OCR extracts data from 4000+ document types. (2) Biometric face matching compares the selfie to the document photo. (3) Passive liveness detection ensures the person is real from a single selfie with no user interaction. (4) Fraud detection checks for document tampering and forgery. Results are returned in seconds via a simple GET request.

How much does Kairos cost?

Kairos is the lowest-price identity verification API on the market. It offers a free tier with 100 API calls to evaluate the platform with no credit card required. Paid usage is pay-per-transaction with automatic volume discounts — prices decrease automatically as usage increases. There are no setup fees, no minimum commitments, and no sales calls required. Unlike Onfido, Veriff, and Jumio which require enterprise sales engagement and custom quotes, Kairos offers fully transparent, self-serve pricing.

How long does it take to integrate the Kairos API?

Kairos can be integrated in under 10 minutes. Sign up at developer.kairos.com for instant API credentials — no sales call or approval process needed. The integration is a simple three-step process: (1) POST your document image and selfie to the Full ID Verification endpoint with app_id and app_key headers. (2) Receive a UUID. (3) GET results using that UUID. Code samples are ready in Node.js, Python, and cURL, and a Postman collection is available for immediate testing.

What ID documents does Kairos support?

Kairos supports over 4,000 ID document types from 200+ countries, including passports, driver's licenses, national ID cards, and residence permits. The AI automatically reads text, MRZ codes, and checks document authenticity from a single photo.

Does Kairos support liveness detection?

Yes. Kairos uses passive liveness detection that works from a single selfie photo. Unlike competitors that require active liveness (blinking, head-turning, or video recording), Kairos requires zero user interaction — just one photo. The AI analyzes pixel-level patterns to detect printed photos, screen replays, masks, and deepfake spoofing attempts.

What are the main use cases of Kairos?

Kairos is used across multiple industries: financial services and fintech for KYC/AML compliance and account opening, online gaming for player identity and age verification, hospitality for guest identity checks, alcohol and cannabis delivery for age verification, online dating for preventing catfishing, micromobility for rider verification, and adult entertainment for age assurance compliance.

Does Kairos store biometric data?

No. Kairos does not store biometric data. Face images are immediately converted into masked templates so identities cannot be reverse-engineered. Data at rest is encrypted with AES-256, and data in transit is protected with TLS. This makes Kairos suitable for privacy-sensitive applications and GDPR compliance.