doxx.net raises $38 million to put a gate between agents and your systems

doxx.net has come out of closed beta with a $38 million Series A led by Andreessen Horowitz, with Animo Ventures and Focal.vc taking part. The round was announced on 1 October.

It builds private, peer-to-peer networks for people and their ai agents. Each agent gets its own identity and certificate, and can be given or denied access to specific machines and services, with that access revoked instantly. It has been described as Tailscale built for ai agents, with a twist: agents can also reconfigure the network themselves, onboarding devices, adjusting firewalls and creating internal domains.

The company says it blocked more than 38 million threats during its closed beta, which began in December 2025. Its founder is Barrett Lyon, who founded the DDoS-defence company Prolexic.

Why it matters

As agents move from chat to software that buys things and touches other people's systems, the gate between an agent and what it's allowed to do becomes real infrastructure. The law is starting to draw the line, and the market is selling the fence. The open question is whether this survives as a separate product or gets built into the big labs' own agent tools.