Harmonic Security
eDR94Effective DR: 94/100. Top 25%. Measured by StartupHub.ai. Median 68.Agent59Agent Readiness: 59/100. Top 25%. Measured by StartupHub.ai. Median 41.Workforce AI security platform that protects and enables AI use for millions of employees at more than 100 companies.
About
Harmonic Security delivers AI Governance and Control (AIGC), an intelligent control layer that secures and enables the AI-First workforce. The platform provides granular visibility into AI usage across IDEs, browsers, desktop AI tools, and agentic workflows, allowing organizations to govern how employees use AI without hindering their productivity. It utilizes proprietary Small Language Models (SLMs) to classify sensitive data by context, not pattern, enabling real-time detection and blocking of proprietary code uploads to unsanctioned models and preventing sensitive data exposure.
Key facts
At-a-glance profile data
- Website
- harmonic.security
- Headquarters
- San Francisco, United States
- Employees
- 87
- Total funding
- $50M (Series B)
- Business model
- B2B
Harmonic Security pricing
Plans as published by Harmonic Security. Current prices on harmonic.security
Funding rounds
| Date | Round | Amount | Lead investors |
|---|---|---|---|
| 14 Oct 2026 | Series B | $50M | Crosspoint Capital Partners |
Integrates with
- Salesforce
- HubSpot
- Notion
- GitHub
- Linear
- Webflow
Tech stack
Detected on harmonic.security, last scanned 16 Oct 2026. Run your own scan
- Compliance
- HIPAA, GDPR
- Analytics
- Google Tag Manager
- Support
- HubSpot
- CMS / Builders
- Webflow
- CDN
- Cloudflare
- Email provider
- Google Workspace, SendGrid
“Solutions Architect at harmonic-security-inc.”
View on Reddit“Harmonic Security analyzed nearly 2 million AI session minutes and found that across every major provider with a free tier, two thirds of the activity on personal accounts is work, not personal.”
View on Reddit“Harmonic Security lets teams adopt AI tools safely by protecting sensitive data in real time with minimal effort. It gives enterprises full control and stops leaks so that their teams can innovate confidently.”
View on RedditSome comments are pulled from public discussions around the web (look for the source icon). Quotes are excerpts; click through to read the full thread.
Frequently asked
What is Harmonic Security's Effective Domain Rating?
StartupHub's Effective Domain Rating for Harmonic Security is 94 out of 100, measuring real cross-surface visibility in search engines and AI answers rather than claimed link authority. That is underrated against its Ahrefs Domain Rating of 67, meaning it surfaces in search and AI results more than its claimed authority alone would suggest.
Is Harmonic Security trustworthy and reputable?
StartupHub's Data Trust & Reputation score for Harmonic Security is 94 out of 100, based on site security posture and privacy practices.
How much funding has Harmonic Security raised?
Harmonic Security has raised a total of $50M in funding. The most recent round on record is Series B.
How many employees does Harmonic Security have?
Harmonic Security has approximately 87 people on record.
Microsoft Defender for Cloud
Microsoft Defender for Cloud offers security and comprehensive security features that compete with Harmonic Security's AI governance platform.
Zscaler Internet Access
Zscaler Internet Access provides security solutions that may overlap with Harmonic Security's offerings, particularly in areas of network and cloud security.
Financial Services
Advisor360 has used Harmonic Security to get a handle on AI usage within their organization, indicating a need for AI governance and control in financial services.
Healthcare Information Sharing
Health-ISAC is a community services champion for Harmonic Security, suggesting that organizations in healthcare information sharing can benefit from their AI governance solutions.
Security Automation
Tines integrates with Harmonic Security to notify and assign training based on Harmonic Security alerts, indicating that companies using security automation platforms could be potential clients.
Confirmed customer relationships for Harmonic Security. Speculative buyer-fit guesses are not shown.