HiddenLayer vs Artemis Security
Side-by-side comparison of AI visibility scores, market position, and capabilities
HiddenLayer protects AI models from adversarial attacks, model theft, and evasion techniques with a model-agnostic security layer requiring no architecture changes.
About
HiddenLayer is an AI security company founded in 2022 that raised $50M in Series A funding to protect machine learning models from adversarial attacks and exploitation. The platform sits between AI models and the inputs they receive, monitoring for adversarial examples, prompt injection attacks, model inversion attempts, and evasion techniques designed to manipulate model outputs. HiddenLayer also protects against model theft through model extraction detection and intellectual property protection controls that alert teams when adversaries attempt to clone proprietary models. The platform is model-agnostic and integrates with existing ML infrastructure without requiring changes to model architectures or inference pipelines. HiddenLayer serves enterprises in financial services, defense, and technology sectors where AI models process sensitive data or make high-stakes decisions. The company's security research team regularly publishes findings on novel AI attack techniques, building credibility as a thought leader in AI security alongside its commercial platform.
Raised $70M in combined Seed and Series A in 2026 within 6 months of launch; Series A led by Felicis. Positions as "AI vs AI" autonomous defense platform.
About
Artemis builds an autonomous AI defense platform designed to counter adversaries that are themselves operating AI agents for offense. The thesis is that as attackers adopt AI for reconnaissance, exploit generation, and lateral movement, defenders need AI systems that operate at matching speed and scale — an "AI vs AI" posture.
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