diff --git a/README.md b/README.md
index ea0fa3e..867c290 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,7 @@ easy tool to use, and is targeted at non-developers.
 * [frp](https://github.com/fatedier/frp) [![frp github stars badge](https://img.shields.io/github/stars/fatedier/frp?style=flat)](https://github.com/fatedier/frp/stargazers) - Comprehensive open alternative to ngrok. Supports UDP, and has a P2P mode. I believe it uses a custom TCP protocol for multiplexing, which can either run over a single TCP connection or a connection pool.
 * [ngrok 1.0](https://github.com/inconshreveable/ngrok) [![ngrok 1.0 github stars badge](https://img.shields.io/github/stars/inconshreveable/ngrok?style=flat)](https://github.com/inconshreveable/ngrok/stargazers) - Original version of ngrok. No longer developed in favor of the commercial 2.0 version.
 * [localtunnel](https://github.com/localtunnel) [![localtunnel github stars badge](https://img.shields.io/github/stars/localtunnel/localtunnel?style=flat)](https://github.com/localtunnel/localtunnel/stargazers) - Written in node. Popular suggestion.
+* [Nebula](https://github.com/slackhq/nebula) - [![nebula github stars badge](https://img.shields.io/github/stars/slackhq/nebula?style=flat)](https://github.com/zerotier/slackhq/nebula) Peer-to-peer overlay network. Developed and used internally by Slack. Similar to Tailscale but completely open source. Written in Go.
 * [ZeroTier](https://www.zerotier.com/) - [![zerotier github stars badge](https://img.shields.io/github/stars/zerotier/ZeroTierOne?style=flat)](https://github.com/zerotier/ZeroTierOne/stargazers) Layer 2 overlay network.
 * [sshuttle](https://github.com/sshuttle/sshuttle) [![sshuttle github stars badge](https://img.shields.io/github/stars/sshuttle/sshuttle?style=flat)](https://github.com/sshuttle/sshuttle/stargazers) - Open source project originally from one of the founders of Tailscale. Server doesn't require root; client does. Explicitly designed to avoid TCP-over-TCP issues.
 * [chisel](https://github.com/jpillora/chisel) [![chisel github stars badge](https://img.shields.io/github/stars/jpillora/chisel?style=flat)](https://github.com/jpillora/chisel/stargazers) - SSH under the hood, but still uses a custom client binary. Supports auto certs from LetsEncrypt. Written in Go.