Andrew Gault, CEOZeroTier founder and CTO Adam Ierymenko started the company in 2013 with a single architectural conviction that zero-trust principles should be embedded directly into internet connectivity, not layered on top afterward. A decade later, that conviction powers a platform running on more than 2.5 million devices worldwide and a product trajectory that has shifted decisively from open-source roots toward commercial maturity.
The open-source foundation was always technically strong. What changed over the last two years was the focus. The company moved toward the ease-of-use and operational polish that enterprise platforms demand. That shift is most visible in Central, the recently released next-generation update to its dashboard.
It’s modern, intuitive and gives network engineers something traditional infrastructure rarely offers: a simple mental model. Rather than layered network diagrams, Central presents a virtual Ethernet switch in the sky, connecting devices through virtual cables. Reasoning about the network becomes easier. Deployment becomes faster.
Built to Disappear into the Background
How does ZeroTier’s architecture secure device connections while simplifying large-scale deployment?
The underlying architecture makes deployment possible at any scale. ZeroTier’s software-defined overlay runs point-to-point, end-to-end, from device to destination across any physical link like fiber, cellular, satellite or public Wi-Fi. The transport layer is irrelevant. Every endpoint generates a unique cryptographic identity at installation. What observers see on the network is encrypted IP traffic, nothing else, no services, no protocols, no metadata.
“The attack surface shrinks because there is far less network information exposed compared to traditional networking,” says Andrew Gault, CEO.
When a device installs the lightweight client, it appears in Central within seconds. Administrators authorize it with a single click or automate the entire process through a fully documented API. Device identities can be pre-provisioned before hardware ships. The moment a device powers on in the field, it authenticates and connects without manual intervention. Rollouts that once required weeks of hardware staging, carrier coordination and ticketing now take minutes. No capital expenditure or physical installation.
Flow rules extend that control further. Defined in Central and pushed directly to devices, they function as a distributed firewall, enforcing segmentation without touching physical infrastructure. A device requiring access to two separate systems joins two separate networks simultaneously. If it’s ever compromised, lateral movement stops at the boundary.
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The attack surface shrinks because there is far less network information exposed compared to traditional networking.
How does ZeroTier maintain connectivity across multiple networks during mission-critical operations?
Resilience is the other defining characteristic. ZeroTier supports multihoming and multipath routing, shifting encrypted traffic across available links in real time without dropping active sessions. That architecture proved decisive for Active Security, a defense contractor tasked with streaming real-time video from OT sensors and IP-based cameras across cellular, satellite and fiber WANs during a series of high-visibility distributed events. Traditional VPN and SD-WAN solutions were too rigid and too slow to deploy. Using ZeroTier, Active Security unified disparate transport links into a single secure network fabric, connecting over 50 OT devices across fluctuating networks and delivering uninterrupted, low-latency video with identity-based access controls and 256-bit end-to-end encryption.
Built for What’s Coming
Why is device-centric networking critical for AI-scale growth and quantum-era security?
Two forces shape the roadmap. The first is machine-scale growth. Around 18 billion devices are currently online. Gartner forecasts 50 billion devices by the end of the decade, driven not by more people, but by AI agents communicating autonomously. Most networking software is built around user identities. ZeroTier has always focused on device identities, making it structurally suited for environments where machines communicate at scale without human intermediaries. In AI-driven systems operating in the physical world, network failures aren’t performance metrics; they’re safety events.
The second is quantum readiness. The White House has mandated that US government agencies comply by 2030. Meeting that requirement means updating cryptographic systems across entire infrastructures, including legacy hardware that won’t be replaced overnight. A software-defined overlay enforces encryption at the network layer regardless of what sits beneath it, protecting traffic while the underlying infrastructure catches up.
ZeroTier continues developing new products against both vectors, with a major platform announcement forthcoming. “We often say you can run ZeroTier anywhere, from a light bulb to a server,” says Gault. The company built its foundation in open source. It is now building its future on scale.
