doxx.net raises $38M Series A led by a16z for private networks for people and AI agents

Andreessen Horowitz said Thursday it is leading a Series A in doxxnet (doxx.net), the Miami company building private networking for people and AI agents; reporting pegs the round at $38 million with Animo Ventures and Focal.vc participating as the platform moves into open beta.

As agents start browsing and calling tools on users’ behalf, who sees those connections becomes a first-class security question. a16z leading a $38 million Series A into a private, agent-aware network is a bet that privacy infrastructure has to be rebuilt for that world, not just bolted onto the public internet.

On Thursday, 1 October 2026, Andreessen Horowitz said it is leading a Series A in doxxnet. The essay is titled “Investing in doxxnet.” Joel de la Garza and Martin Casado posted it. The page dates the essay October 1, 2026. It does not print an hour. A Series A is an early private funding round, named with a letter. Leading means a16z is the investor running the round. The essay does not print a dollar amount. Those lines are a16z’s.

The dollar figure is in the same-day reporting. Axios Pro, in an exclusive by Chris Metinko dated October 1, 2026, says doxx.net has raised a $38 million Series A led by Andreessen Horowitz as its private agentic defined networking platform launches into open beta. The lede says founder Barrett Lyon told Axios Pro. Thirty-eight million dollars is the new money that report names. FinSMEs, the same day, says doxx.net, a Miami, Florida company, raised $38 million in a Series A led by Andreessen Horowitz, with Animo Ventures and Focal.vc participating. The a16z essay spells the name doxxnet. The site, Axios, and FinSMEs spell it doxx.net. It is the same company. The $38 million is the figure in Axios Pro and FinSMEs. It is not a number on the a16z essay.

What those reports say the round is for. Axios says the platform is launching into open beta. An open beta is a public trial, wider than a closed test, before a general release. FinSMEs says the company intends to use the funds to support that open-beta launch and to keep building what FinSMEs calls privacy-by-architecture networking, for individuals, enterprises, and their agents. An enterprise, here, is a company using the product for its own people, not only a person at home. citybiz, recirculating the round the same day, says the company did not disclose how it plans to allocate the new capital. FinSMEs prints a use of the money. citybiz says the allocation was not disclosed. Those are two accounts. They are not the same sentence.

What a16z says the product is. doxxnet gives people and their agents a parallel, private network they can build on. An agent, here, is software that takes a next step for a person. The essay’s examples are reading documents, calling an API, moving files, and browsing, with access to that person’s data and accounts. An API is a doorway a program uses to ask another service for data or to take an action. Parallel means the network sits beside the public internet, rather than being only a filter laid on top of it. On that network, a16z says, a person can browse privately, transfer files directly, connect devices and agents into encrypted meshes, and communicate peer to peer. A mesh means the devices and agents link to one another, so a message can travel between them without a public relay in the middle. Peer to peer is the plain version of that idea: the two ends talk to each other. Calls, messages, and file transfers, the essay says, travel directly between peers, with no central communications server in the middle. The essay’s point is that where an agent connects, and who can see that connection, is now the person’s concern. Those lines are a16z’s.

Names, certificates, and threat blocking, as the essay states them. Users can create domains that are not on the public internet and that resolve only inside this parallel network. Resolve means the name turns into a place to connect. Those names are secured by doxxnet’s own certificate authority, instead of the public internet’s. A certificate authority is the issuer of the certificates that say a name really is that service. DNS-level threat protection blocks connections to phishing and malware destinations before a person or an agent reaches them. DNS is the address book of a network: the lookup that turns a name into a connection. Phishing is a fake page meant to steal a login. Malware is software meant to harm the machine. Blocking at that lookup means the connection is refused before it starts. Those lines are a16z’s.

Agentic Defined Networking is the company’s name for who gets to set the rules. The essay says agents can help configure the network itself: connect devices, set firewall rules, and open private connections under the user’s policies. A firewall rule is a decision about which connections are allowed. a16z says the idea is that people and their agents should control the networks they use and the boundaries around their activity, and that the control starts with the infrastructure. doxxnet, the essay says, has built its own global backbone with dedicated hardware, its own IP space, a private naming system, and its own certificate authority. A backbone is the long-haul network the company runs. Dedicated hardware means machines the company operates. IP space is the set of network addresses it controls, rather than addresses borrowed on the public internet. A user can start without giving an email address or a phone number. a16z calls those choices a way to collect less personal information in the first place. The essay sets that against relying on a VPN provider in an unknown country, where you cannot check what happens to the data. A VPN is a tunnel that sends your connection through someone else’s server. That contrast is a16z’s. The essay does not say doxxnet is a VPN, and it does not say the product is a copy of one.

Who is building it, as a16z states it. Barrett Lyon helped pioneer modern DDoS defense with Prolexic, later acquired by Akamai. A DDoS attack, short for distributed denial of service, floods a site with junk traffic until it falls over. He went on to found companies including BitGravity, acquired by Tata Communications, and Defense.net, acquired by F5. a16z says he has spent more than two decades building networks and defending them. The essay says a16z is leading the Series A and partnering with Barrett and the team to build private networking for people and the agents acting on their behalf. Those lines are a16z’s. The essay does not give him a chief-executive title. FinSMEs calls him CEO, the chief executive.

The board, and what the pages do not put a number on. citybiz’s October 1 account says Andreessen Horowitz partner Joel De La Garza will join doxx.net’s board. The a16z essay names Joel de la Garza as an author, with Martin Casado. It does not print a board seat. citybiz also says Animo Ventures and Focal.vc participated, which matches FinSMEs, and that the company did not disclose a valuation. A valuation is the price a round puts on the whole company. Axios Pro’s exclusive is the report that Lyon told Axios about the $38 million and the open beta. The pages do not print a valuation, a yearly revenue figure, or a count of users.

What FinSMEs adds, kept on that page. It describes a parallel network with its own DNS root, its own IP space, an encrypted mesh, and networking that agents can drive. A DNS root is the starting point of that private address book. The page says the company operates across six continents on infrastructure it owns, and that starting requires no personal information. Six continents is FinSMEs’s count of where those machines sit. It is not a count of users. The a16z essay says a global backbone, dedicated hardware, its own IP space, a private naming system, and its own certificate authority. It does not print the six.

The picture is Andreessen Horowitz’s announcement graphic for the round. A dark field shifts from black into teal at the upper right and a muted violet at the lower left. Centered is the doxxnet mark, a white spiked crown over a ring, with a short horizontal stroke through the ring. The word doxxnet sits under the mark in white. Lower on the card, the a16z wordmark is set in white. The graphic names doxxnet and a16z. It does not print a dollar figure, and it does not print a calendar date.

In plain terms, Andreessen Horowitz said on Thursday that it is leading a Series A in doxxnet, the Miami company building a private network for people and for the agents that browse and call tools on their behalf. Axios Pro and FinSMEs put that round at $38 million. FinSMEs names Animo Ventures and Focal.vc as participants and says the money supports an open beta. a16z describes private browsing, direct file transfers, encrypted links between devices and agents, names that resolve only on that network, and blocking of phishing and malware at the address lookup, on infrastructure the company runs, with its own addresses and its own certificate authority. citybiz says a16z partner Joel de la Garza is joining the board. The a16z essay does not print the $38 million. The pages do not print a valuation or a user count.