Kamal

Zero-downtime deployment tool for containerized apps on any server via SSH

Developer ToolsFree

Kamal is an open-source deployment tool developed by 37signals (Basecamp/HEY) that deploys Dockerized applications to any server via SSH with zero-downtime rolling deploys, without requiring a managed cloud platform or Kubernetes. It manages container orchestration using Traefik as a reverse proxy and kamal-proxy, handles secrets, and rolls back deployments from a simple configuration file. Rails teams and web development teams who own their server infrastructure choose Kamal for its simplicity over Kubernetes and its direct lineage from production use at Basecamp.

Key Features

• ✓Zero-downtime deploys
• ✓SSH-based
• ✓Traefik proxy
• ✓Rollback support
• ✓Secrets management