Kamal describes itself as "Capistrano for Containers": a command-line tool that takes a config file and a list of server IPs, builds your Docker image, pushes it to a registry and swaps it in on each server with zero downtime, over plain SSH. 37signals built it to move HEY and Basecamp off the cloud, and it is the default deployment tool in Rails. Dokploy solves the same problem with a web dashboard, a Traefik proxy, managed databases, templates and backups. Both are free and open source; the choice is about how your team wants to work.
How each one deploys
Kamal is imperative and explicit. You write config/deploy.yml with the image name, the registry, the servers and the environment, run kamal setup once (it installs Docker on fresh Ubuntu servers that have your SSH key) and kamal deploy for every release. The tool builds the image locally or on a remote builder, pushes it, pulls it on every server and performs a rolling restart behind its proxy; the project lists zero-downtime deploys, rolling restarts, asset bridging and remote builds among its features. Everything is a command you run from your machine or from CI, and "it's just basic Docker commands being called", as the site puts it.
Dokploy is declarative through a UI. You add a server (or use the one Dokploy runs on), connect a Git provider, create an application and choose a build type; a webhook or a button triggers the build and deploy, Traefik routes the domain and renews the certificate, and the deployment history, logs, rollbacks and previews are in the dashboard. The same actions are available over its API and CLI, so CI can drive it too.
Feature by feature
| Capability | Dokploy | Kamal |
|---|---|---|
| Interface | Web dashboard, API, CLI | Command line only |
| Build from source | Nixpacks, Railpack, Dockerfile, Heroku and Paketo buildpacks, static | Your Dockerfile, built locally or on a remote builder |
| Container registry required | Only for build servers and Swarm clusters | Yes, every deploy pushes to one |
| Reverse proxy and TLS | Traefik with Let's Encrypt, configured by the UI | Kamal's own proxy with automatic TLS, configured in deploy.yml |
| Zero-downtime deploys | Yes (Swarm rolling updates for services; health checks) | Yes, the core feature |
| Databases | First-class services with scheduled S3 backups | "Accessories" (any container) with no backup tooling |
| Docker Compose stacks | Yes | No; one app plus accessories per config |
| Templates | 500+ one-click open-source apps | None |
| Preview deployments, rollbacks | Yes, both in the UI | Rollback by redeploying a previous tag; no previews |
| Multi-server | Remote servers over SSH, Swarm clusters | Native: roles across any number of hosts |
| Team access | Members, permissions, 2FA, SSO on Enterprise | Whoever has SSH keys and the config |
| Price | Free; Dokploy Cloud $4.50 per server | Free |
Where Kamal is better
- You are a Rails shop with CI already. Kamal is in the Rails default stack, the config is version-controlled next to the app, and a deploy is a pipeline step. There is no dashboard to secure or update.
- You want the deploy to be fully reproducible from the repository. Everything Kamal does is in deploy.yml and the Dockerfile; nothing lives in a database on a server.
- Many identical servers. Kamal was designed to roll a release across a fleet with roles (web, job, cron) and does it with one command and no cluster software.
- Minimal footprint. Nothing runs on the servers except Docker, the proxy and your containers.
Where Dokploy is better
- Several applications and several people. A dashboard with projects, members and permissions beats a shared SSH key when more than one team deploys to the same servers.
- Databases and the things around an app. PostgreSQL with a nightly dump to S3, Redis, a MinIO bucket, Plausible analytics and an Umami instance are each a few clicks in Dokploy; in Kamal they are accessories you define, back up and monitor yourself.
- No Dockerfile yet. Nixpacks and Railpack detect Node.js, Python, PHP, Go and static sites and build them without one.
- Compose stacks and templates. Anything shipped as a docker-compose.yml deploys as-is, and the template catalogue covers most self-hosted software.
- Visibility. Build logs, container logs, a terminal, deployment history and rollbacks in one place, without SSH.
Choosing, and the server either way
A one-line rule that holds up: one Rails app on a few servers with a CI pipeline, Kamal; many apps, databases and people on one or two servers, Dokploy. Teams sometimes use both, Kamal for the monolith and Dokploy for the supporting services, and nothing stops that as long as they do not fight over port 80 on the same host.
Both run happily on a MassiveGRID VPS. For Dokploy the hosting page presets the configurator to 2 vCPU and 4 GB (Starter, $9.58 a month shared or $19.80 dedicated) and 4 vCPU and 8 GB (Growth); for Kamal any Ubuntu 24.04 server with your SSH key works, and the same Proxmox HA failover, Ceph storage and dedicated-core option apply. Whichever tool you pick, put builds on dedicated cores or a separate builder if deploy times matter, and keep the proxy's ports 80 and 443 as the only ones open besides SSH.
Frequently Asked Questions
Does Kamal have a web UI?
No. Kamal is a command-line tool configured by a deploy.yml file in your repository and run from your machine or your CI system. Dokploy is a web dashboard with an API and CLI alongside. If you want a UI on top of Kamal-style deployments you are effectively describing Dokploy.
Can Dokploy do zero-downtime deployments like Kamal?
Yes. Dokploy runs applications as Docker Swarm services with rolling updates and health checks, so a new version starts and passes its check before the old container is removed; Traefik keeps routing throughout. Kamal achieves the same with its own proxy and a rolling restart across hosts, which is its headline feature.
Do I need a container registry for Dokploy or Kamal?
Kamal always does: every deploy pushes the image to a registry and pulls it on the servers. Dokploy builds and runs on the same server by default with no registry, and needs one only when you add a remote build server or a Swarm cluster, where images must be shared between machines.
Dokploy hosting from $9.58 a month
A MassiveGRID VPS preset for Dokploy: 2 vCPU, 4 GB RAM and 64 GB NVMe for $9.58 a month on shared cores or $19.80 on dedicated cores, in New York, London, Frankfurt or Singapore, on a Proxmox HA cluster with Ceph storage, a 100% uptime SLA and a 15-day money-back guarantee. Run the one-line installer yourself or open a ticket and we install Dokploy for you.
Configure a Dokploy server