Every other deepfake detector is reactive. FaceSign is interactive.
A video of a face can fool any camera-based liveness check. FaceSign runs a live, adaptive conversation that generates responses no pre-recorded or AI-synthesized face can produce in real time.
[01] The Problem
Deepfake detection is a losing arms race. Active verification is not.
Every passive detector analyzes what it sees. Deepfake generators improve to defeat that analysis. FaceSign doesn't observe — it interrogates.
Generators improve faster than detectors
Today's best deepfake artifact detector is trained on today's deepfakes. Tomorrow's generators ship with countermeasures. You are always one model update behind.
Per-frame analysis misses smoothly looped video
Static liveness checks look at individual frames. A high-quality looped deepfake produces no frame-level artifacts. The check passes. The fraud continues.
The deepfake doesn't know what you're looking for
When you're only watching, the attacker controls the input. FaceSign issues challenges the deepfake has never seen — and can never pre-synthesize a response to.
How FaceSign Works
Interactive challenges that no deepfake can prepare for
Live session triggered
No upload, no pre-recording. The session exists only in the moment it runs.
Adaptive challenges issued
Gaze, expression, spoken response, contextual question. Generated in real time.
Each response generates the next challenge
The session is unique every time. Nothing to rehearse.
30+ simultaneous signals analyzed
Temporal consistency, micro-expressions, voice sync, behavioral latency.
Detection Layers
Six layers. Any one is enough to catch a deepfake.
Adaptive liveness
Dynamic prompts no replay attack can anticipate
Temporal consistency
Multi-frame analysis catches generation artifacts invisible per-frame
Voice + lip sync
Detects voice clones and audio-visual timing mismatches
Micro-expression analysis
Involuntary signals AI faces cannot generate
Behavioral response timing
Human reaction latency vs AI generation latency
Environmental plausibility
Background, lighting, and context consistency
[04] Deploy Anywhere
Drop into your existing flow in hours
FaceSign wraps around your existing sessions. No rip-and-replace.
Video KYC
Add to existing onboarding flow. One API call replaces passive liveness.
Step-up auth
Trigger at high-risk moments: large transactions, password resets, new device logins.
Web SDK
Browser-based, no app install. Works in any modern browser.
iOS & Android
Native SDK for in-app flows with full biometric access.
See a deepfake fail in real time
Monitor bot traffic, stop volumetric attacks, logic abuse, automation, and targeted bots with a multi-layered Bot Management system.
Try the demo