diff --git a/README.md b/README.md
index d6548d6b..e771b74f 100644
--- a/README.md
+++ b/README.md
@@ -3364,6 +3364,7 @@ _Software written in Go._
 - [colima](https://github.com/abiosoft/colima) - Container runtimes on macOS (and Linux) with minimal setup.
 - [Ddosify](https://github.com/ddosify/ddosify) - High-performance load testing tool, written in Golang.
 - [decompose](https://github.com/s0rg/decompose) - tool to generate and process Docker containers connections graphs.
+- [Den](https://github.com/us/den) - Self-hosted sandbox runtime for AI agents. Open-source E2B alternative.
 - [DepCharge](https://github.com/centerorbit/depcharge) - Helps orchestrating the execution of commands across the many dependencies in larger projects.
 - [dish](https://github.com/thevxn/dish) - A lightweight, remotely configurable monitoring service.
 - [Docker](https://www.docker.com/) - Open platform for distributed applications for developers and sysadmins.