Identity continuity · traffic-only · no tracking
Proksimity knows whether it's really you on this device — or someone pretending to be — by listening only to the way your browser already talks. No client script, no payload capture, no surveillance.
the knock — the traffic's rhythm, not its contents
Why now
Websites used to remember you with cookies and client-side fingerprinting. That toolkit is being removed, one vendor at a time — and credential-only auth can't catch a stolen session.
Blocked or user-gated by Apple ITP, Firefox ETP, and Chrome's user-choice model.
The OS, hardware, and plugin APIs it relied on are being shut by the same vendors.
Identity signal from artifacts the browser emits regardless — nothing installed, nothing extra.
How it works
Recognize the person by the rhythm, not by reading their mail.
At the edge, observe only traffic artifacts — TLS ClientHello, header order and casing, HTTP/2/3 and QUIC session behavior, WebSocket frame timing. Raw payloads are never read.
Turn each session into a bounded feature vector (~35 features, missing values marked — never guessed). One vector per session, within half a second of it ending.
Link sessions to an anonymous identity graph via embeddings and calibrated thresholds — so the same person is recognized across their phone and laptop.
When confidence is low, don't guess — step up. Ask for WebAuthn, an OTP, or a one-time code. The link gates step-up; it never grants auth alone.
The promises
No passwords, no messages, no query strings, no bodies. We never read or store what you send.
No client script, no OS API, no hardware identifier. We use only what the network stack already emits.
Every uncertain case degrades to a prompt, never to silent acceptance. We'd rather ask than wrongly trust.
Features live under a day; raw edge metadata under 15 minutes. The graph decays, it doesn't accumulate.
The decision
Every session lands on a calibrated risk band. The system never invents certainty — it reports the band and acts accordingly.
Built with
Early access
Proksimity is in early development. Tell us where you run auth, and we'll show you the knock.
Request early access