H

HiddenLayer

Application

AI security platform that detects adversarial attacks, model theft and data poisoning against machine learning models in production; its runtime detection product is marketed as working without access to a customer's data or models.

Total funding$50M

Valuation—

Employees—

Founded2022

HeadquartersLeander, USA

StatusPrivate

Products

Selected offerings — the AI products recorded here, not the vendor's full catalogue.

• HiddenLayer AI Security Platform Platform

  Security platform purpose-built for AI systems: discovers models and AI supply chains across an organisation, simulates attacks against them, and detects runtime abuse such as model theft, data poisoning and adversarial inputs.

Inside HiddenLayer AI Security Platform

• HiddenLayer AI Discovery Application Included with the parent

  Inventories every model, agent and AI workflow running in an organisation, so security teams know what exists before defending it.

• HiddenLayer AI Supply Chain Security Application Included with the parent

  Scans models an organisation builds, buys or borrows for tampering and malicious content before they reach production.

• HiddenLayer AI Attack Simulation Application Included with the parent

  Runs adversarial attacks against a customer's own models to find where they break before an attacker does.

• HiddenLayer AI Runtime Security Application Included with the parent

  Watches models in production and blocks attacks against them as they happen.

• Agent Harness Security Application

  Protects the orchestration layer connecting AI coding agents to tools, memory, files and enterprise systems, detecting agentic-specific threats like memory poisoning and prompt injection with platform-aware controls for Claude Code, Cursor and GitHub Copilot.

Similar products 48

No sourced competitor yet: no filing, vendor document or measured-market report read so far names a rival for this company, so none is asserted. The companies below are the closest by what their products do.

How this list is ranked ↗

VAVectra AIPrivate · $1.2BAgent Harness Security and Cloud Detection and Response for AWS do comparable work on data security and threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (private).2 of 4 capabilitiesShared product typeCompareSSentinelOnePublic · $7.5BAgent Harness Security and Singularity Cloud Security do comparable work on data security and threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).3 of 4 capabilitiesShared product typeComparePAPalo Alto NetworksPublic · $302.9BAgent Harness Security and AI Access Security do comparable work on data security and threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).4 of 4 capabilitiesShared product typeCompareASAbnormal SecurityPrivate · $5.1BHiddenLayer AI Security Platform and Attune do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (private).1 of 4 capabilitiesShared product typeCompareCCrowdStrikePublic · $192.6BHiddenLayer AI Security Platform and CrowdStrike Falcon platform do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).1 of 4 capabilitiesShared product typeCompareDDarktracePrivate · $5.3BHiddenLayer AI Security Platform and Darktrace ActiveAI Security Platform do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (private).1 of 4 capabilitiesShared product typeCompareZZscalerPublic · $30.5BHiddenLayer AI Security Platform and Zero Trust Exchange do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).4 of 4 capabilitiesShared product typeCompareWWizAcquiredAgent Harness Security and Wiz AI-SPM do comparable work on data security and threat detection and response; both also serve buyers who need to detect and respond to security threats; Wiz is acquired, with no independent scale.2 of 4 capabilitiesShared product typeCompareCPCheck Point Software TechnologiesPublicHiddenLayer AI Security Platform and ThreatCloud AI do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; Check Point Software Technologies's scale not recorded.1 of 4 capabilitiesShared product typeCompareFFortinetPublic · $124.8BAgent Harness Security and FortiAI-Protect do comparable work on data security and threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).4 of 4 capabilitiesShared product typeCompareRCRed CanaryPrivateAgent Harness Security and Red Canary Managed Phishing Response do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; Red Canary's scale not recorded.1 of 4 capabilitiesShared product typeCompareDDoppelPrivate · $615MHiddenLayer AI Security Platform and Doppel Security Awareness Training do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (private).1 of 4 capabilitiesShared product typeCompareCCyeraPrivate · $12BAgent Harness Security and Omni DLP do comparable work on data security; both also serve buyers who need to detect and respond to security threats; similar scale (private).2 of 4 capabilitiesShared product typeCompareMFMind FoundryPrivate · $44M raisedHiddenLayer AI Discovery and Nightingale do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; same layer and the same scale band (early-stage private).1 of 4 capabilitiesShared product typeSame scale bandCompareIIBMPublic · $216.6BAgent Harness Security and IBM Guardium AI Security do comparable work on data security and threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).4 of 4 capabilitiesShared product typeCompareMMicrosoftPublic · $3.7TAgent Harness Security and Microsoft Security Copilot do comparable work on data security and threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).4 of 4 capabilitiesShared product typeCompareTTorqPrivate · $1.2BHiddenLayer AI Security Platform and Torq Auto Triage do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (private); ships AI agent rather than the same layer.1 of 4 capabilitiesDifferent layerCompareNNiCEPublic · $6.5BHiddenLayer AI Security Platform and Xceed AI FRAML do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).2 of 4 capabilitiesShared product typeCompareSSplunkAcquiredAgent Harness Security and Splunk Enterprise Security do comparable work on data security and threat detection and response; both also serve buyers who need to detect and respond to security threats; Splunk is acquired, with no independent scale.3 of 4 capabilitiesShared product typeCompareVVercelPrivate · $9.3BHiddenLayer AI Security Platform and Vercel BotID do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (private).2 of 4 capabilitiesShared product typeCompareRAResemble AIPrivateHiddenLayer AI Security Platform and Resemble Identity do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; Resemble AI's scale not recorded.2 of 4 capabilitiesShared product typeCompareEElasticPublic · $10.2BAgent Harness Security and Elastic Security do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).2 of 4 capabilitiesShared product typeCompareGGlean (Glean Technologies)Private · $7.2BAgent Harness Security and Glean Protect do comparable work on data security; both also serve buyers who need to detect and respond to security threats; similar scale (private).2 of 4 capabilitiesShared product typeCompareDDocusignPublic · $12.7BAgent Harness Security and Docusign Identify do comparable work on data security; both also serve buyers who need to detect and respond to security threats; similar scale (public).1 of 4 capabilitiesShared product typeCompareHHelsingPrivate · $18BHiddenLayer AI Attack Simulation and Cirra do comparable work on threat detection and response; similar scale (private).1 of 4 capabilitiesShared product typeCompareCCiscoPublic · $433.3BAgent Harness Security and Cisco AI Defense do comparable work on data security and threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).4 of 4 capabilitiesShared product typeCompareAAccenturePublic · $111BAgent Harness Security and Cyber.AI do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).1 of 4 capabilitiesShared product typeCompareCCodeRabbitPrivate · $1.5BHiddenLayer AI Discovery and CodeRabbit Security do comparable work on guardrails and safety; both also serve buyers who need to detect and respond to security threats; similar scale (private); ships AI agent and developer tool rather than the same layer.1 of 4 capabilitiesDifferent layerCompareSServiceNowPublic · $130.1BAgent Harness Security and AI Control Tower do comparable work on data security; similar scale (public).3 of 4 capabilitiesShared product typeCompareWWorkdayPublic · $49.3BAgent Harness Security and Agent System of Record do comparable work on data security; similar scale (public).3 of 4 capabilitiesShared product typeCompareAAnthropicPrivate · $965BHiddenLayer AI Discovery and Claude Security do comparable work on guardrails and safety and threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (private).2 of 4 capabilitiesShared product typeCompareJJasperPrivateHiddenLayer AI Discovery and Jasper Brand IQ do comparable work on guardrails and safety; Jasper's scale not recorded.1 of 4 capabilitiesShared product typeCompareWWriterPrivate · $1.9BHiddenLayer AI Discovery and WRITER AI Studio do comparable work on guardrails and safety; similar scale (private).1 of 4 capabilitiesShared product typeCompareKKrispPrivateAgent Harness Security and Krisp Voice Security both serve buyers who need to detect and respond to security threats; Krisp's scale not recorded.Shared product typeCompareDDatadogPublic · $84.9BHiddenLayer AI Security Platform and Bits Security Analyst do comparable work on threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (public).3 of 4 capabilitiesShared product typeCompareITInvisible TechnologiesPrivate · $144M raisedHiddenLayer AI Discovery and Synapse do comparable work on guardrails and safety; similar scale (private).2 of 4 capabilitiesShared product typeCompareDDataikuPrivate · $3.7BAgent Harness Security and Dataiku LLM Guard Services do comparable work on data security; similar scale (private).3 of 4 capabilitiesShared product typeCompareOOpenAIPrivate · $852BAgent Harness Security and OpenAI Daybreak do comparable work on data security and threat detection and response; both also serve buyers who need to detect and respond to security threats; similar scale (private).3 of 4 capabilitiesShared product typeCompareZZapierPrivate · $5BAgent Harness Security and AI Guardrails by Zapier do comparable work on data security; both also serve buyers who need to detect and respond to security threats; similar scale (private).2 of 4 capabilitiesShared product typeCompareNNeo4jPrivate · $2BAgent Harness Security and GraphAware Hume do comparable work on threat detection and response; similar scale (private).1 of 4 capabilitiesShared product typeCompareFAFiddler AIPrivate · $100M raisedHiddenLayer AI Discovery and Fiddler Guardrails do comparable work on guardrails and safety; similar scale (private).2 of 4 capabilitiesShared product typeCompareHCHuawei CloudPrivateHiddenLayer AI Discovery and Content Moderation do comparable work on guardrails and safety; both also serve buyers who need to detect and respond to security threats; Huawei Cloud's scale not recorded.1 of 4 capabilitiesShared product typeComparePPresightPublic · $5.6BHiddenLayer AI Discovery and Presight Financial Solutions both serve buyers who need to detect and respond to security threats; similar scale (public).Shared product typeCompareAAArthur AIPrivate · $62.7M raisedHiddenLayer AI Discovery and Arthur Agent Security & Governance do comparable work on guardrails and safety; same layer and the same scale band (early-stage private).2 of 4 capabilitiesShared product typeSame scale bandCompareUUniphorePrivate · $2.5BAgent Harness Security and Communication Recording Agent do comparable work on data security; similar scale (private).1 of 4 capabilitiesShared product typeCompareDDatabricksPrivate · $190BHiddenLayer AI Discovery and Unity Gateway do comparable work on guardrails and safety; similar scale (private).2 of 4 capabilitiesShared product typeCompareBBroadcomPublic · $1.7TAgent Harness Security and AgentMinder do comparable work on data security; similar scale (public).2 of 4 capabilitiesShared product typeCompareCCore42PrivateAgent Harness Security and Core42 Sovereign Public Cloud do comparable work on data security; Core42's scale not recorded; ships API service and infrastructure service rather than the same layer.1 of 4 capabilitiesDifferent layerCompare

Closest alternatives are pairs a vendor page itself compares. Similar products are matched from what each product does; nothing in that group is asserted as a rivalry.

Sources

Total funding

Press release · 19 Sep 2023

HiddenLayer's own release, "HiddenLayer Raises $50M in Series A Funding to Safeguard AI", led by M12 (Microsoft's Venture Fund) and Moore Strategic Ventures. No valuation was disclosed in the release. An aggregator-reported cumulative total of $56.2M across two rounds could not be corroborated against a second primary source and was not used; this is the Series A amount alone.

Founded

Press release · 19 Sep 2023

Company founded in 2022, headquartered in Leander, Texas, per the same release.

Description

Official documentation · 6 Sep 2026

The claim exists but covers ONE of the four platform modules: "Their non-invasive AIDR solution provides robust, real-time protection against adversarial attacks without ever needing to access a customer's sensitive data or proprietary models." AI Discovery, Supply Chain Security and Attack Simulation carry no such statement. Worth knowing when weighing it: the sentence is a customer testimonial on the vendor's page, not vendor copy — hence "is marketed as" rather than a flat assertion.

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