Introducing Mobile Nebula for iOS & Android

Mesh VPN client now available

Access your Nebula overlay network from anywhere. It's free and open source.

Download Nebula 1.3.0 on GitHub (slackhq/nebula)


Recent Events

October 19, 2020

Defined's CEO, Ryan Huber, gave a talk at the All Things Open virtual conference. Watch the recording to learn about the origins of the Nebula project and how it is being used today.


News & Press

TechSNAP podcast ep. 419

Jim Salter and Wes Payne have a chat about Nebula and the usefulness of overlay networks on their Systems, Network, and Administration Podcast.

"I love the idea that I could in theory just set up all my PCs on my LAN, leave them all DHCP, […] put them on a Nebula network, and then never use the unencrypted IP addresses for anything."


Ars Technica

Jim Salter gives his first impressions of Nebula in Ars-style technical depth.

"We think that the greatest potential value to using Nebula over a more conventional VPN tool like WireGuard is its ability to discover the most efficient routes wherever it happens to be."


Linux Unplugged podcast ep. 329

Ryan Huber has a candid conversation about Nebula with the hosts of the Linux Unplugged podcast.

"Build one flat network across cloud providers, personal networks, with even thousands of nodes."


Slack Engineering blog

In this announcement post, Ryan Huber shares what Nebula is, the motivation behind building it, and the team's guiding design principles.



Ryan Huber and Nate Brown are the creators of Nebula, the scalable overlay networking tool they built and deployed to connect tens of thousands of servers while working together at Slack.


​Nebula was publicly announced and open sourced in late 2019. In February of 2020, Nate and Ryan left Slack to launch Defined Networking, a new company focused on bringing performant, simple, and secure networking products to organizations large and small.


We are a team of opinionated do-ers who love technology that lives up to its promises (and occasionally even delights us). Good work takes time. Great work takes focus. We feel fortunate to have the support of investors who share these beliefs, and we're incredibly motivated by the opportunity ahead.


Interested in building the next generation of networking infrastructure software?

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Send us an email if you're interested in discussing overlay networks. We'd love to hear about what kinds of problems you're trying to solve with Nebula.

© 2020 Defined Networking, Inc.