doxx.net Raises $38M to Secure AI Agent Privacy

The big picture: doxx.net has launched an open beta of its privacy and security platform designed for both people and AI agents, after raising $38 million in Series A funding led by Andreessen Horowitz. The company, which can be found at doxx.net, aims to provide a fundamentally private networking architecture.

Why it matters:

• AI Agent Risks: The rapid adoption of autonomous AI agents creates new cybersecurity challenges, as agents browsing the web can encounter phishing sites, malware, and other threats.
• Privacy by Design: doxx.net’s founder, Barrett Lyon, emphasizes that the internet was not designed for privacy, positioning their platform as a solution where privacy is inherent to the architecture itself.
• Proven Protection: During a closed beta that began in December 2025, doxx.net’s threat protection technology reportedly blocked over 38 million threats.

How it works:

• Agentic Defined Networking (ADN): doxx.net’s platform allows users and AI agents to create private networks, communicate peer-to-peer, and establish security policies.
• Threat Mitigation: The system limits connections to potentially malicious destinations, combining encrypted networking with DNS-based threat protection.
• User Anonymity: Users can get started on the platform without providing an email address, phone number, or other personal information, enhancing privacy.

The catch: The market for AI agent security is nascent but rapidly growing, attracting significant investment. doxx.net will need to differentiate its ‘architecture-first’ approach from other emerging solutions focused on agent sandboxing or identity management, especially as major cloud providers integrate more security features directly into their AI offerings.

Key Facts

• Company: doxx.net
• Amount: $38M
• Round: Series A
• Investors: Andreessen Horowitz (lead), Animo Ventures, Focal.vc
• Founder: Barrett Lyon
• Sector: AI Agent Security