HS

Harmonic Security

Harmonic Security sells AI governance and data protection software for enterprise security teams to monitor workforce AI use and enforce policies.

StageUndisclosed

Founded2023

HeadquartersSan Francisco, USA

StatusPrivate

Product

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

• Harmonic Guide Application Sold on its own

  Harmonic Guide monitors employee AI interactions and applies inline warnings, coaching, and blocking to protect sensitive data.

Similar products 94

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 ↗

CCyeraLate-stageHarmonic Guide and Cyera Browser Shield do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareLSLumia SecurityEarly-stageHarmonic Guide and AI Usage Control do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompareKKnosticEarly-stageHarmonic Guide and Kirin do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareSSentinelOnePublicHarmonic Guide and Prompt Security do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareEAEnkrypt AIAcquiredHarmonic Guide and Enkrypt AI do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded; Enkrypt AI is acquired, with no independent scale; ships API service rather than the same layer.2 of 2 capabilitiesDifferent layerCompareILIndora LabsUndisclosedHarmonic Guide and Arbiter do comparable work on data security and guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareZZscalerPublicHarmonic Guide and Zscaler AI Guard for Users do comparable work on data security and guardrails and safety; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareGAGeordie AIEarly-stageHarmonic Guide and Beam both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareGGlean (Glean Technologies)Late-stageHarmonic Guide and Glean Protect do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareLLiminalUndisclosedHarmonic Guide and Liminal do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompareHHiddenLayerEarly-stageHarmonic Guide and Agent Harness Security both list data security; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either.2 of 2 capabilitiesShared product typeComparePAPalo Alto NetworksPublicHarmonic Guide and AI Access Security do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareLLogosGuardUndisclosedHarmonic Guide and LogosGuard AI Privacy Shield do comparable work on data security and guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareCPCheck Point Software TechnologiesPublicHarmonic Guide and Workforce AI Security do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareSASingulr AIEarly-stageHarmonic Guide and Singulr Agent Pulse do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompareMAMaxim AIUndisclosedHarmonic Guide and Bifrost Edge both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareSServiceNowPublicHarmonic Guide and ServiceNow Action Fabric both serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareWWorkdayPublicHarmonic Guide and Agent System of Record do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareTTraceforceUndisclosedHarmonic Guide and Traceforce do comparable work on data security and guardrails and safety; scale not recorded for either; ships platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompareRRunlayerEarly-stageHarmonic Guide and ToolGuard do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompareLALumenova AIUndisclosedHarmonic Guide and AI Gateway do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships infrastructure service rather than the same layer.2 of 2 capabilitiesDifferent layerCompareCCrowdStrikePublicHarmonic Guide and Falcon Guardian do comparable work on data security and guardrails and safety; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareDADynamo AIUndisclosedHarmonic Guide and DynamoGuard do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompareIIBMPublicHarmonic Guide and IBM Guardium AI Security both list data security; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeComparePSPillar SecurityEarly-stageHarmonic Guide and Runtime Guardrails do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompareWWitnessAIEarly-stageHarmonic Guide and Witness Protect do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.2 of 2 capabilitiesDifferent layerComparePPalisadeUndisclosedHarmonic Guide and Palisade both list data security; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareDDataikuLate-stageHarmonic Guide and Dataiku Govern both list guardrails and safety; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareSSalesforcePublicHarmonic Guide and MuleSoft Agent Fabric both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeCompareVAVectra AILate-stageHarmonic Guide and Cloud Detection and Response for AWS both list data security; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeComparePPreambleUndisclosedHarmonic Guide and AI Threat Detection do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompareLLassoEarly-stageHarmonic Guide and Lasso AI Security Platform both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareSSAPPublicHarmonic Guide and SAP AI Agent Hub both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeCompareEEchoMarkEarly-stageHarmonic Guide and EchoMark Email both list data security; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareDDocusignPublicHarmonic Guide and Docusign Identify both list data security; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeCompareFFortinetPublicHarmonic Guide and FortiDLP both list data security; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareWWizAcquiredHarmonic Guide and Wiz AI-SPM both list data security; Harmonic Security's scale not recorded; Wiz is acquired, with no independent scale; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareZZapierLate-stageHarmonic Guide and AI Guardrails by Zapier do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareASAbnormal SecurityLate-stageHarmonic Guide and AI Governance both list data security; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareOObiguardUndisclosedHarmonic Guide and Governance AI do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompareMMicrosoftPublicHarmonic Guide and Microsoft Security Copilot both list data security; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareSSierraLate-stageHarmonic Guide and Ghostwriter both serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.Shared product typeCompareJJasperUndisclosedHarmonic Guide and Jasper Brand IQ both list guardrails and safety; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareJJFrogPublicHarmonic Guide and JFrog Agent Skills Registry both list guardrails and safety; scale not recorded for either; ships developer tool, infrastructure service and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareOOktaPublicHarmonic Guide and Okta for AI Agents do comparable work on data security and guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareWWriterLate-stageHarmonic Guide and WRITER AI Studio both list guardrails and safety; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeCompareCCiscoPublicHarmonic Guide and Cisco AI Defense do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareBBroadcomPublicHarmonic Guide and AgentMinder do comparable work on data security and guardrails and safety; Harmonic Security's scale not recorded; ships hardware and platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompareFFabraixUndisclosedHarmonic Guide and Nyx both list guardrails and safety; scale not recorded for either; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAurascapeEarly-stageHarmonic Guide and Zero-Bypass MCP Gateway both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships infrastructure service rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAlethicaUndisclosedHarmonic Guide and Policy-as-Code both list guardrails and safety; scale not recorded for either; ships AI agent and agent platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAArthur AIEarly-stageHarmonic Guide and Arthur Agent Security & Governance both list guardrails and safety; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareITInvisible TechnologiesLate-stageHarmonic Guide and Synapse both list guardrails and safety; Harmonic Security's scale not recorded; ships agent platform, data service and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAAdversa AIUndisclosedHarmonic Guide and Coding Agent Security Platform both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAnacondaLate-stageHarmonic Guide and AI Security & Guardrails do comparable work on data security and guardrails and safety; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeComparePGPrediction GuardEarly-stageHarmonic Guide and Prediction Guard Control Plane both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareCCraniumEarly-stageHarmonic Guide and Cranium ONE both list guardrails and safety; scale not recorded for either; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareNSNera SystemsUndisclosedHarmonic Guide and Nera ChatApp both list data security; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareAAsenionUndisclosedHarmonic Guide and Asenion AI Control System both list guardrails and safety; scale not recorded for either; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareHHarnessLate-stageHarmonic Guide and AI Firewall both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareSSplunkAcquiredHarmonic Guide and Splunk Enterprise Security both list data security; Harmonic Security's scale not recorded; Splunk is acquired, with no independent scale.2 of 2 capabilitiesShared product typeCompareCCodeRabbitLate-stageHarmonic Guide and CodeRabbit Security both list guardrails and safety; Harmonic Security's scale not recorded; ships AI agent and developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareZZenityLate-stageHarmonic Guide and Zenity Platform both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAAlinia AIEarly-stageHarmonic Guide and Seny both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships model API rather than the same layer.1 of 2 capabilitiesDifferent layerCompareVEVolcano EngineUndisclosedHarmonic Guide and LLM Application Firewall (大模型应用防火墙) do comparable work on data security and guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareNNVIDIAPublicHarmonic Guide and NVIDIA OpenShell do comparable work on data security and guardrails and safety; Harmonic Security's scale not recorded.2 of 2 capabilitiesShared product typeCompareAAssemblyAILate-stageHarmonic Guide and AssemblyAI Guardrails do comparable work on data security and guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareAAAutomation AnywhereUndisclosedHarmonic Guide and Process Discovery both serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareTTypefaceUndisclosedHarmonic Guide and Typeface Brand Graph both list guardrails and safety; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareDDelineaUndisclosedHarmonic Guide and Delinea Iris AI both list data security; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareDDatadogPublicHarmonic Guide and Datadog AI Guard both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeCompareLALiquid AIUndisclosedHarmonic Guide and ShieldFlow do comparable work on data security and guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareTTrueFoundryEarly-stageHarmonic Guide and TrueFoundry Agent Gateway both serve buyers who need to block unsafe AI inputs and unapproved AI use; scale not recorded for either; ships API service, agent platform and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareRRogoLate-stageHarmonic Guide and Watchtower both list guardrails and safety; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareAAmazonPublicHarmonic Guide and Amazon Bedrock Guardrails both list guardrails and safety; both also serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeCompareHHaptikAcquiredHarmonic Guide and AI Agent Builder both serve buyers who need to block unsafe AI inputs and unapproved AI use; Harmonic Security's scale not recorded; Haptik is acquired, with no independent scale.Shared product typeCompareUUniphoreLate-stageHarmonic Guide and Communication Recording Agent both list data security; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeCompareFAFiddler AILate-stageHarmonic Guide and Fiddler Guardrails both list guardrails and safety; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareVVercelLate-stageHarmonic Guide and Vercel Passport both list guardrails and safety; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeCompareHAHippocratic AILate-stageHarmonic Guide and AI Call Supervisor both list guardrails and safety; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeCompareDDecagonLate-stageHarmonic Guide and Personal Agent Gateway both list guardrails and safety; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeCompareRAResemble AIEarly-stageHarmonic Guide and Resemble Signal both list guardrails and safety; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareOFOpenClaw FoundationUndisclosedHarmonic Guide and OpenClaw Enterprise both list guardrails and safety; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareCAConcentrate AIUndisclosedHarmonic Guide and LLM Gateway both list data security; scale not recorded for either; ships API service rather than the same layer.1 of 2 capabilitiesDifferent layerCompareSStacktraceUndisclosedHarmonic Guide and Stacktrace Personal Agent Gateway both list guardrails and safety; scale not recorded for either; ships agent platform and developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAnthropicLate-stageHarmonic Guide and Claude Security both list guardrails and safety; Harmonic Security's scale not recorded.1 of 2 capabilitiesShared product typeCompareNNeuralTrustEarly-stageHarmonic Guide and TrustGate both list guardrails and safety; scale not recorded for either; ships developer tool and infrastructure service rather than the same layer.1 of 2 capabilitiesDifferent layerCompareDDecaworkUndisclosedHarmonic Guide and Decawork both list guardrails and safety; scale not recorded for either; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareSSalusUndisclosedHarmonic Guide and Salus both list guardrails and safety; scale not recorded for either; ships developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAHAll Hands AIEarly-stageHarmonic Guide and Agent Control Plane both list guardrails and safety; scale not recorded for either; ships AI agent, agent platform and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareHAHamming AIEarly-stageHarmonic Guide and Hamming both list guardrails and safety; scale not recorded for either; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareKAKlira AIUndisclosedHarmonic Guide and Klira SDK both list guardrails and safety; scale not recorded for either; ships developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareLLatentUndisclosedHarmonic Guide and Latent both list guardrails and safety; scale not recorded for either; ships developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareNnRouterUndisclosedHarmonic Guide and nRouter LLM Gateway both list guardrails and safety; scale not recorded for either; ships API service rather than the same layer.1 of 2 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

Not found · 26 Oct 2026

Pages read for this record state no funding total.

Valuation

Not found · 26 Oct 2026

Pages read for this record state no valuation or market capitalisation.

Founded

Company disclosure · 26 Oct 2026

"2023 • August Harmonic Founded 2023 • October Raised Seed Funding"

Public listing

Not found · 26 Oct 2026

No listing on the pages read; treated as private.

Description

Official documentation · 26 Oct 2026

Company page: "Harmonic Security delivers AI Governance and Control (AIGC)"

Open Harmonic Security in the directory

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