Harmonic Security
- Company typePrivate
- Founded2023
- HeadquartersSan Francisco, United States
- Headcount51–100
- GTM typeB2B
- OfferingSoftware
Harmonic Security firmographics
Firmographics- Name
- Harmonic Security
- Legal name
- Harmonic Security Inc.
- Website
- https://harmonic.security
- Company type
- Private
- Founded year
- 2023
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Ownership category
- akta.pro rank
Harmonic Security industry classification
Industry- Product category
- AI Governance and Data Loss Prevention
- NAICS
- Security Systems Services (56162)
- SIC
- Services-Computer Programming Services (7371)
- akta.pro primary industry
- Endpoint Data Protection (Device DLP/Encryption) (HDADAEAG)
- akta.pro secondary industry
- API Security & Service-to-Service Security (mTLS, Service Mesh Security) (HDABAHAN)
Keywords
Where Harmonic Security is headquartered
LocationHeadquarters
- HQ city
- San Francisco
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
Harmonic Security business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Infrastructure, Operations
Revenue model
- Subscription — Harmonic Explore, Guide and Command tiers: Tiered SaaS subscription with three productized tiers (Explore = visibility/inventory, Guide = inline controls + desktop endpoint, Command = adds MCP/agent governance). Pricing is quote-based and not publicly disclosed; tier structure implies per-seat or per-organization licensing typical of enterprise security SaaS.
- AWS Marketplace channel: Solution available on AWS Marketplace, enabling subscription procurement through AWS billing for enterprise customers.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Annual | Explore — visibility tier: prompt-level inventory across 1,000+ apps, AI Usage Intelligence, sensitive data detection, risk scoring, identity enrichment via Entra/Okta/Google. Deployed as browser extension, OpenTelemetry, desktop apps and AI agents. |
| Subscription | Annual | Guide (Most Popular) — adds endpoint coverage, inline coaching (warn/nudge/block) in <200ms, customizable interventions, granular policies by data type/app/user role, SIEM/SOAR alert webhooks. |
| Subscription | Annual | Command — adds MCP client/server discovery, granular agent permissions (read/write/execute), real-time data protection inside agentic workflows, cross-surface intelligence, prompt injection detection (coming soon). |
Go-to-market motion5 records
Distribution channels3 records
Marketing channels8 records
Harmonic Security product offering
Product offeringCore offering
Harmonic Security provides an AI Governance and Control platform that uses proprietary endpoint Small Language Models to discover shadow AI, classify user intent and sensitive data in context, and enforce inline policies (warn, nudge, block) across browser, desktop, embedded SaaS and agentic AI surfaces. It is sold as three subscription tiers — Harmonic Explore (visibility), Harmonic Guide (inline controls) and Harmonic Command (unified human-and-agent governance) — and is extended by the Harmonic MCP Gateway and Harmonic Endpoint Agent for desktop and Model Context Protocol traffic.
Product overview
Harmonic Security delivers an AI Governance and Control (AIGC) platform offered as three tiered packages — Harmonic Explore (visibility and shadow AI discovery), Harmonic Guide (real-time inline coaching and browser/desktop enforcement), and Harmonic Command (unified governance for humans and AI agents). The platform is complemented by two technical components: the Harmonic Endpoint Agent, which extends coverage to native desktop AI apps, IDEs, and inference APIs, and the Harmonic MCP Gateway, which governs agentic Model Context Protocol traffic. Together, Explore, Guide, and Command share a common SLM-powered detection engine that operates in under 200 ms across 1,000+ AI surfaces (browsers, embedded SaaS, desktop apps, and MCP-connected agents).
Differentiator
Problem solved
Functional benefit
Brands
- Harmonic Explore: Entry-tier product providing AI usage visibility and shadow AI discovery, including prompt-level visibility across 1,000+ applications and sensitive data detection in context.
- Harmonic Guide
- Harmonic Command
Products and services
- Harmonic Explore AI usage visibility and shadow AI discovery product for enterprise CISOs and security teams. Deploys a browser extension and OpenTelemetry collectors to map every AI tool, prompt and business use case across the organization, with sensitive-data exposure detection, risk scoring and identity enrichment from Entra/Okta/Google.
- Harmonic Guide Real-time AI policy enforcement and inline controls for enterprise security teams. Includes everything in Explore and adds endpoint coverage, inline coaching (warn, nudge, or block in under 200 ms), customizable interventions, granular policies by data type and user role, and SIEM/SOAR alert webhooks.
- Harmonic Command Unified governance for humans and AI agents for enterprise security and risk teams. Includes everything in Guide and adds MCP client/server discovery, granular agent permissions for read/write/execute actions, real-time data protection inside agentic workflows, cross-surface intelligence, and prompt-injection detection.
- Harmonic MCP Gateway Locally installed developer gateway that intercepts Model Context Protocol traffic to discover MCP clients and servers, enforce least-agency policies and inspect agent tool calls in real time, preventing sensitive data leakage from autonomous workflows. For enterprise engineering, security and platform teams adopting agentic AI.
- Harmonic Endpoint Agent Endpoint client that identifies native AI apps, AI-first IDEs, CLI tools, locally hosted models and direct inference API calls running on employee devices, and ties them back to process and user. For enterprise security teams needing visibility and control over desktop AI use.
Companies that use Harmonic Security
Customer profileNamed customers14 records
Segments7 records
Ideal customer profiles5 records
Harmonic Security technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration14 records
AI capability4 records
Feature7 records
Harmonic Security partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered event partner, ecosystem partner (displayed as customer logo), core technology partner and strategic integration partner.
- Core to Cloudevent partnerCo-hosting Goodwood Festival of Speed 2026 opening day experience; regional reseller/distribution relationship in the UK.
- Anthropicecosystem partner (displayed as customer logo)Anthropic is listed as a customer/logo on Harmonic's homepage; Harmonic publishes practitioner guides for securing Anthropic's Claude, Claude Cowork, Claude Code, Claude Desktop and Claude in Chrome.
- Amazon Web Services (AWS)core technology partnerPartnered with the AWS Generative AI Innovation Center to fine-tune Harmonic's ModernBERT data-leakage detection models on Amazon SageMaker, Amazon Bedrock and Amazon Nova Pro, achieving sub-500ms latency and 48%–640% throughput gains. Solution is listed on AWS Marketplace with EU compliance support. Harmonic is also AWS Qualified Software certified.
- KnowBe4strategic integration partnerIntegration between Harmonic Security and KnowBe4 makes secure GenAI usage training seamless, connecting Harmonic's AI risk signals with KnowBe4's security awareness training platform.
Scale indicators10 records
Recent moves6 records
Expansion highlights6 records
Harmonic Security competitors and assessment
Company assessmentDirect peers
- BigID: Data intelligence platform for data privacy, security, and governance with AI/ML-based classification. Competes with Harmonic in data discovery and classification, particularly for organizations needing AI training data governance and sensitive data inventory.
- Concentric AI: Semantic-based data security and posture management that uses AI to autonomously discover and protect sensitive data. Comparable to Harmonic's intent-aware SLM-based classification approach and overlapping buyer (CISO/data security teams).
- Cyera: AI-native data security posture management (DSPM) platform that discovers, classifies and protects sensitive data across cloud and AI workloads. Directly competes with Harmonic on AI-aware data classification and governance, targeting similar CISOs and security architects.
- Securiti: Unified data intelligence cloud providing data governance, privacy, security and AI compliance. Directly competes with Harmonic's AI governance and sensitive-data protection narrative, especially in regulated enterprises needing AI Usage Intelligence.
- Grip Security: SaaS security posture management (SSPM) and shadow SaaS/AI discovery platform. Directly competes with Harmonic Explore's shadow AI discovery use case and the broader category of 'shadow IT for AI'.
Broad incumbents
- Netskope: SSE/SASE leader with deep CASB and inline data protection capabilities. Competes broadly in enterprise security budgets for inline AI governance and DLP, with overlapping buyer (CISO/security architect) and complementary coverage areas.
- Microsoft Purview: Microsoft's unified data governance and compliance suite referenced in multiple Harmonic customer cases as the incumbent stack Harmonic complements/replaces. The dominant enterprise platform Harmonic must coexist with or displace.
- Zscaler: Cloud security platform (SASE/ZIA/ZPA) with growing AI-aware DLP capabilities. Referenced by Harmonic customers (global law firm) as the existing browser security stack that did not cover AI use cases — the gap Harmonic fills.
- Varonis: Public data security and analytics platform with broad DLP, classification and AI governance capabilities. Overlaps with Harmonic's DLP-for-GenAI positioning but operates as a much broader incumbent data security suite.
Emerging players
- Prompt Security: AI security platform focused on protecting LLMs, GenAI applications, and copilots from prompt injection and data leakage. Competes in the same AI governance / data leakage prevention niche as Harmonic Guide and Command.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Harmonic Security social profiles
Digital presenceHarmonic Security compliance and trust
Trust signalCompliance7 records
Harmonic Security financial estimates
Financial estimateRevenue estimate
Valuation estimate
Harmonic Security leadership team
Management profileNumber of profiles
Profiles11 records
Harmonic Security subsidiaries and ownership
Company hierarchySubsidiaries1 record
Harmonic Security funding detail
Funding detailFunding overview
Funding rounds3 records
Investors7 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Harmonic Security M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Harmonic Security
What does Harmonic Security do?
Harmonic Security provides an AI Governance and Control platform that uses proprietary endpoint Small Language Models to discover shadow AI, classify user intent and sensitive data in context, and enforce inline policies (warn, nudge, block) across browser, desktop, embedded SaaS and agentic AI surfaces. It is sold as three subscription tiers — Harmonic Explore (visibility), Harmonic Guide (inline controls) and Harmonic Command (unified human-and-agent governance) — and is extended by the Harmonic MCP Gateway and Harmonic Endpoint Agent for desktop and Model Context Protocol traffic.
Is Harmonic Security a public or private company?
Harmonic Security is a private company. It is classified as venture growth investor backed and is currently operating.
When was Harmonic Security founded?
Harmonic Security was founded in 2023. It employs 51 to 100 people.
Where is Harmonic Security based?
Harmonic Security is headquartered in San Francisco, United States, in the North America region.
How does Harmonic Security make money?
Two revenue lines are on record. Subscription — Harmonic Explore, Guide and Command tiers are the primary driver. The others are AWS Marketplace channel.
Who are Harmonic Security's main competitors?
Direct peers on record are BigID, Concentric AI, Cyera, Securiti and Grip Security. Broad incumbents are Netskope, Microsoft Purview, Zscaler and Varonis. Prompt Security is listed as an emerging player.
Does Harmonic Security have an API?
Yes. Harmonic Security exposes telemetry and audit data via OpenTelemetry (OTel) export and alert webhooks for SIEM/SOAR integrations. The platform consumes Model Context Protocol (MCP) traffic via its MCP Gateway and can route data to external security analytics tools. Identity sync is supported with Entra ID, Okta, and Google Workspace for enriching alerts with employee identity data. Regional data hosting options and a full prompt audit log for streaming to a data lake for custom analysis are available. Public REST/GraphQL developer APIs are not advertised. Developer documentation is at docs.harmonicsecurity.app.
What industry is Harmonic Security in?
Harmonic Security's product category is AI Governance and Data Loss Prevention. Its primary akta.pro industry code is HDADAEAG, Endpoint Data Protection (Device DLP/Encryption), with a secondary code of HDABAHAN, API Security & Service-to-Service Security (mTLS, Service Mesh Security). Its NAICS code is 56162 and its SIC code is 7371.