Best Protect AI Alternatives

HiddenLayer is an AI security platform that protects machine learning models across their full lifecycle. It provides runtime model security to detect adversarial attacks in real-time, model scanning for supply chain threats in model files, automated red teaming for vulnerability assessment, and AI guardrails for prompt injection defense. Backed by $31.9M from M12 and IBM Ventures, named Gartner Cool Vendor 2024.

ModelScan by Protect AI is an open-source tool that scans machine learning model files for malicious or unsafe code before they are loaded into production. Supporting formats like Pickle, HDF5, and SavedModel, it detects hidden code execution, deserialization attacks, and supply chain threats in the AI/ML model artifact pipeline, integrating into CI/CD as a critical security gate.

OpenSSF Model Signing is an open-source project for cryptographically signing and verifying machine learning model files to ensure integrity and provenance. Built on Sigstore PKI, it provides CLI tools and a Python library for signing model artifacts and verifying they haven't been tampered with. Part of the OpenSSF AI/ML Working Group, reaching v1.0 in 2025 for production supply chain security.