Hyperfence Logo Hyperfence

AI Security Platform

Provably safe,
not probably safe

Detect policy violations and block harmful prompts or responses deterministically, faster and cheaper than a second guard LLM.

Free plan · No credit card required

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What's included

Start protecting your AI today, for free

Vector Hyperfencing

Preset semantic safe zones keep your AI on topic and policy-compliant out of the box. Custom zones are available on Pro.

Usage & Token Stats

See token consumption and request volumes across your models. Deeper analytics and trend history are available on Pro.

Blocked Event Log

Every blocked request is logged with context, including what was blocked, why, and which session triggered it.