Identity Is
Entropy
Coherence
A browser fingerprint is the combined observable profile created by device characteristics, engine behavior, rendering traits, API surfaces, and how all correlate over time. Anti-bot systems detect inconsistency, not incorrect values.
"Plausible" Is
Multidimensional
"If values look right, it's fine"
Detection systems measure more than exposed strings. Many high-signal traits are derived from real engine behavior, correlated across multiple APIs, and sensitive to version distribution.
"Freeze and reuse forever"
Fingerprints age. The web platform shifts constantly: browser versions roll forward, graphics stacks change, API surfaces expand, distributions change by region and device class.
Anti-bot systems evaluate consistency across all surfaces simultaneously, not individual values in isolation.
Millions of Real-World
Fingerprints Per Month
Realism is distributional. Undetect ingests millions of fingerprints monthly across Windows, macOS, and Android, capturing depth across versions, builds, device classes, regions, and hardware variability.
From Minimal Hints
To Coherent Identity
Most customers do not want to specify 200+ parameters. They want to say "Windows, US, typical laptop" and receive a cohesive full profile prior to launch.
Patching identity after browser start risks early measurements capturing wrong state, contradictions between surfaces, and subtle execution mismatches.
Identity is coherent from session start. No early leakage, no surface contradictions, no execution pathway mismatches.
Persistent.
Evolving.
Continuous.
Some workflows require stable identity across time. Others need freshness. Undetect supports both with an operational identity model built around coherence and continuity.
Persistent Identities
For returning-user semantics, account-based sessions, and long-lived agent personas. Persisted fingerprints tied to specific identities enable controlled reuse over time, not just "reuse the same JSON" but an operational identity model with session continuity.
Session Sync
A fingerprint alone is not identity continuity. Session Sync pulls and backs up cookies, local/session storage, permissions, and session artifacts, giving you deterministic continuity instead of fragile custom state handling.
Automatic Evolution
Fingerprints become stale as platforms shift. Undetect updates fingerprints over time each time a browser launches, maintaining coherence, evolving plausibly, avoiding frozen outliers, preserving continuity without violating realism.
Mirror Your Real
User Population
Some teams must match their own end users precisely, when the "correct" profile is not generic realism but exact alignment to a known device base.
Deployable SDK
Capture device profiles from your own application users under your control.
Precise Mirroring
Align agent identities to actual customer device distributions.
Highest Fidelity
The most accurate approach when exact population match is required.
Unlimited Fingerprints.
No Extra Cost.
Fingerprints are foundational, not a premium line item. Per-fingerprint pricing pushes customers toward unsafe shortcuts. The correct unit of value is successful, reliable operation, not a JSON object.
Validate Coherence
In Your Environment
Fingerprints should be validated in the real threat environment: your targets, your regions, your workflow patterns. We demonstrate pre-launch resolution, continuity via persisted identities, controlled evolution, and stable success rates across repeated runs.