Self-hosted dev sandboxes with preview URLs (Docker, Go, no K8s)

Sandboxed is an open-source, self-hosted platform that enables rapid deployment of isolated development environments with AI coding agents and live preview URLs, requiring only Docker and eliminating the complexity and cost of Kubernetes-based solutions. For IT organizations, this represents a significant opportunity to reduce infrastructure costs (dozens of sandboxes per server vs. traditional VMs), simplify multi-tenant application architectures, and accelerate development velocity for AI-powered and low-code platforms. The lightweight, single-machine deployment model and transparent codebase reduce operational overhead while providing the isolation, persistence, and scaling capabilities needed for modern SaaS and agent platforms.