Cygnus

Cygnus is a self-hosted serverless platform for Bun and Node.js applications, eliminating the overhead of containers, registries, and YAML configuration. It solves the problem of deploying Node applications with full compatibility while achieving fast cold starts and efficient resource usage. The platform targets developers and operations teams in organizations that want to self-host their infrastructure. It is positioned as an alternative to container-based platforms and V8-isolate platforms, offering real isolation with kernel sandboxing and sub-100ms revival times.

Key features

• Kernel-sandboxed cages with namespaces and seccomp
• Sub-100ms cold start revival
• Scale to zero with disk-only idle apps
• Blue-green deployments with instant rollback
• SSRF containment by default
• One SQLite file for backup
• Git push deployment with previews
• CLI deployment via cygnus deploy
• Dashboard upload deployment
• Native DB drivers and raw TCP support
• No containers, no registry, no YAML
• One binary installation