The only TLS fingerprint database built from first-hand captures.
Every fingerprint in Byteprint comes from our own capture factory: we run the real software and record the JA4 it produces. No network monitoring, no crowdsourcing, no guessing. Ground truth for everything that speaks TLS, from browsers and AI agents to malware, served through one API.
What Byteprint is
We capture every fingerprint ourselves.
Existing JA4 databases are built from monitored traffic or crowdsourced submissions, so they can only guess what produced a fingerprint. Byteprint runs the real client in an autonomous capture factory and stores its fingerprint with the exact software, version, and environment attached. One database of everything that speaks TLS, built for threat intelligence, available through an API.
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Join the Byteprint waitlist today.
Tell us what you need to identify. Personal researchers and security teams are both welcome.