Every OSS prompt injection guard needs a GPU, a sidecar, or 7 GB of disk. PromptPurify is 14 MB, CPU-only, runs inside your Node process. Zero network calls. $0/call.
Two layers: deterministic structural firewall + 14 MB ML classifier. Benchmarked against Meta Prompt-Guard, ProtectAI, deepset same inputs, same scoring code, reproducible on your laptop.
Battle-tested by 2,458 red teamers before release. MIT. Drop in with 3 lines of code.
The cognitive engine’s model gets trained from end-users, separates good users & bad users, and provides real-time solutions to detect and prevent online fraud attacks.
Sensfrx
