HiddenLayer
HiddenLayer is an Austin, Texas-based AI security company founded in March 2022 by Chris Sestito (CEO), Tanner Burns (Chief Scientist), and Jim Ballard (CIO) — former Cylance researchers who encountered a real-world attack on production ML models. HiddenLayer builds an AI Security Platform that protects machine learning and generative AI systems across their entire lifecycle, comprising four integrated modules: AI Discovery (catalogs AI assets and eliminates shadow AI), AI Supply Chain Security (Model Scanner inspects models, weights, and pickle/RDS files for malicious payloads and backdoors), AI Attack Simulation (continuous adversarial red-teaming for agentic and generative systems), and AI Runtime Security / AIDR (a real-time detection-and-response firewall using deterministic classifiers that sit outside the model inference path to detect prompt injection, jailbreaks, indirect attacks, data leakage, and malicious tool calls in agentic and MCP systems). The platform exposes native connectors for CI/CD, MLOps, SIEM/SOAR, API gateways, and major data and cloud platforms, plus guardrail integrations for OpenAI Agents, LangChain, AWS Strands, Microsoft Agent Framework, Azure APIM, and a GitHub Action for Model Scanner. HiddenLayer publishes Python, TypeScript, and Java/Kotlin SDKs and research-grade tooling such as HiddenPickle (Python pickle disassembler/patcher) and HiddenPromise (R .rdx/.rdb/.rds disassembler). The company has raised $56M total ($50M Series A in September 2023 led by M12 / Microsoft's Venture Fund and Moore Strategic Ventures, with Booz Allen Ventures, IBM Ventures, Capital One Ventures, and Ten Eleven Ventures participating) and serves Fortune 500 enterprises, financial services, and US Federal agencies. The HiddenLayer SaaS console and REST API are gated behind enterprise sales and not publicly self-serve, placing this profile in Tier-3 (enterprise-gated) coverage.
HiddenLayer is profiled on the APIs.io network. Tagged areas include AI Security, ML Security, AISec, AIDR, and AI Detection & Response.
HiddenLayer’s developer surface includes engineering blog, GitHub presence, YouTube channel, and 31 more developer resources.
Kin Score
Security Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Get Started 2
Portal, sign-up, and the first successful call
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 5
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Learn 1
Tutorials, courses, talks, and written guidance
Operate 1
Status, limits, changes, and where to get help
Company 7
The organization behind the API
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Other 16
Properties that don't map to a standard resource type
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Source (apis.yml)
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