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HiddenLayer

AI security platform for model protection and threat detection

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.

About HiddenLayer

HiddenLayer addresses the emerging attack surface created by AI model deployment with a four-pillar security platform covering runtime protection, supply chain scanning, red teaming, and guardrails. As organizations deploy AI models in production, they face threats that traditional security tools cannot detect — adversarial inputs designed to manipulate model outputs, poisoned model files containing hidden payloads, prompt injection attacks targeting LLM applications, and model extraction attempts. HiddenLayer provides purpose-built defenses for each of these threat vectors.

The runtime security component monitors model inference in real-time, detecting adversarial inputs and anomalous patterns that indicate attacks against deployed models. The model scanning tool examines model files for hidden malware, backdoors, and unsafe code — critical for organizations using models from public repositories like Hugging Face. The automated red teaming capability systematically probes AI systems for vulnerabilities including jailbreaks, data extraction, and alignment bypasses, providing actionable findings for security teams.

HiddenLayer has raised $31.9M from investors including Microsoft's M12, IBM Ventures, and Booz Allen Hamilton, and was recognized as a Gartner Cool Vendor in 2024 for AI security. The platform supports major ML frameworks and deployment environments, integrating into existing security workflows. For organizations deploying AI in regulated industries or handling sensitive data, HiddenLayer fills a critical gap between traditional application security and the unique threat landscape of machine learning systems.

Pricing & Platform Specs

Pricing Summary

Commercial enterprise pricing based on custom quote. HiddenLayer provides an AI Security Platform featuring Machine Learning Detection and Response (MLDR) and Automated Model Vulnerability Scanning. Pricing scales based on active protected models, inference query volume, and deployment tier (SaaS vs. customer VPC / air-gapped on-prem). Free enterprise PoC available upon request.

full pricing breakdown →

Supported Platforms

Cloud platform — integrates with major ML frameworks

Explore categories, tags & use cases

AI/ML supply chain security and model risk management

Protect AI is a YC-backed AI security company focused on ML supply chain protection. Its platform includes ModelScan for detecting malicious code in model files, Guardian for model repository security policies, and NB Defense for Jupyter notebook scanning. Advocates for SLSA-style supply chain standards for ML, helping organizations secure the full pipeline from training data to production model deployment.

freemiumOpen Source

Automated AI security testing and red teaming platform

Mindgard is an automated AI security testing platform that provides continuous red teaming for machine learning models and LLM applications. It detects vulnerabilities including adversarial attacks, prompt injection, data poisoning, and model extraction through systematic probing. Offers end-to-end testing across the AI lifecycle with enterprise compliance reporting and integration into CI/CD pipelines.

paid

AI model validation and risk management platform

Robust Intelligence is an AI risk management platform that validates ML models for security, fairness, and reliability before and after deployment. It provides automated stress testing, bias detection, data drift monitoring, and model risk scoring for enterprise compliance. Serves Fortune 500 customers in financial services, healthcare, and insurance with continuous AI validation aligned to regulatory frameworks.

paid

Community experience

Sources & verification

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FAQ

What is HiddenLayer?

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.

Is HiddenLayer free?

No — HiddenLayer is a paid tool. Commercial enterprise pricing based on custom quote. HiddenLayer provides an AI Security Platform featuring Machine Learning Detection and Response (MLDR) and Automated Model Vulnerability Scanning. Pricing scales based on active protected models, inference query volume, and deployment tier (SaaS vs. customer VPC / air-gapped on-prem). Free enterprise PoC available upon request.

Is HiddenLayer still maintained?

Yes — HiddenLayer is active. Its listing was last verified on September 6, 2026.

What are the best HiddenLayer alternatives?

The first editor-selected HiddenLayer alternatives are Protect AI, Mindgard, Robust Intelligence.