Harmonic Security Secured $50 Million in Series B Funding
The cybersecurity firm plans to use the new capital to expand its engineering team and accelerate its go-to-market strategy.
Updated on Oct. 14, 2026 in Cybersecurity
Live Poll
Do you trust that your employer effectively manages the risks of using AI tools?
Harmonic Security has raised $50 million in a Series B funding round led by Crosspoint Capital Partners LP. The company, which specializes in inspecting employee interactions with AI tools, has now secured a total investment of $76 million.
Why it matters
The company intends to allocate the new funding toward scaling its operations, specifically focusing on new engineering and go-to-market hires. This expansion supports its platform that monitors AI usage across browsers, desktop applications, and agentic workflows.
Harmonic Security employs custom small language models to inspect AI interactions for over 100 customer companies. The firm currently operates with more than 90 staff members across the U.S. and U.K.
The players
Harmonic Security Inc.
A cybersecurity company that develops tools to monitor and secure employee interactions with artificial intelligence.
Crosspoint Capital Partners LP
A private equity investment firm that specializes in the cybersecurity and infrastructure software sectors.
Cisco Systems Inc.
A multinational digital communications technology conglomerate that produces networking hardware and cybersecurity software.
Anthropic PBC
An artificial intelligence research company that develops AI models and safety-focused compliance tools.
The details
The platform integrates with systems like Cisco Systems Inc. Cloud Control and the Anthropic PBC Claude Compliance API to manage AI security. Distribution is facilitated through partnerships with Climb Global Solutions Inc. and Distology Ltd.
Timeline
October 2024: The company raised a $17.5 million Series A round.
June 2026: Cisco announced Agent Builder at Cisco Live.
October 14, 2026: Harmonic Security announced the $50 million Series B funding round.
The Tech Race
Harmonic Security's integration with the Cisco Agent Builder platform demonstrates how independent security startups are anchoring themselves to existing enterprise software infrastructure. This development mirrors a broader industry trend where specialized monitoring tools are increasingly tethered to foundational AI deployment systems.
Employees at client companies may notice increased oversight or security checks when utilizing AI tools for daily tasks. These measures are designed to ensure compliance with corporate safety standards while maintaining the utility of automated workflows.
The takeaway
The substantial investment in Harmonic Security highlights the increasing market demand for specialized tools to police AI use in corporate environments. Companies looking to implement generative AI should prepare for integrated compliance layers that monitor all internal user activity.
Further reading
For more information on the evolving threat landscape for enterprise software, visit our Cybersecurity section.
Live Poll
Do you trust that your employer effectively manages the risks of using AI tools?
