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Self-Hosted PaaS Comparison 2026: Coolify vs Dokploy vs CapRover vs Kamal vs Dokku
Your Own Heroku, on Your Own Server
Platform-as-a-Service (PaaS) tools abstract deployment to a single command or git push. But managed PaaS gets expensive at scale ($25-50/app on Heroku, Railway, or Render). Self-hosted PaaS tools give you the same Heroku-like experience — git push to deploy, automatic HTTPS, zero-downtime deploys, environment variables — but on your own servers. A $40/month dedicated server can run 10-20 apps. Here's how the leading options compare in 2026.
Quick Comparison
| Tool | Approach | Infra Support | Web UI | Git Push Deploy | Auto HTTPS | Docker Compose | Kubernetes |
|---|---|---|---|---|---|---|---|
| Coolify | Web UI + Docker, Heroku-like | Single server or multi-server | ★★★★★ (best-in-class, polished) | Yes (via GitHub/GitLab integration) | Yes (Let's Encrypt) | Yes (built-in) | No (Docker Swarm only) |
| Dokploy | Web UI + Docker, open-source Vercel alternative | Single server or multi-node | ★★★★ (modern, reactive UI) | Yes (GitHub integration) | Yes (Let's Encrypt) | Yes (via Portainer/Traefik) | No |
| CapRover | Web UI + Docker, mature project | Single server | ★★★ (functional, dated UI) | Yes (caprover deploy via CLI) | Yes (Let's Encrypt, default on) | Limited (via captain-definition) | No |
| Kamal (37signals) | CLI-only, Docker on bare metal | Single or multi-server | None (CLI + config file) | No (kamal deploy) | Yes (via kamal-proxy, Let's Encrypt) | No (single containers, Traefik) | No (by design: simpler) |
| Dokku | CLI-only, Heroku-compatible (buildpacks) | Single server | Minimal (community web UI available) | Yes (git push dokku master) | Yes (Let's Encrypt plugin) | Via docker-compose plugin | No |
Deep Dive
Coolify — The closest thing to an open-source Vercel/Heroku. Coolify has the most polished experience: a beautiful web dashboard where you create projects, connect your GitHub repo, and click "Deploy." It supports static sites, Node.js, Python, Go, PHP, Rust, and Dockerfile-based deployments. The UI handles environment variables, custom domains with auto-SSL, database provisioning (PostgreSQL, MySQL, Redis, MongoDB), and deployment rollbacks. Coolify uses Docker under the hood but abstracts it away — you don't need to write Dockerfiles or compose files. The current state: actively maintained (daily commits), growing community, already powering thousands of production deployments. Best for: Developers who want the Heroku/Vercel experience on their own server, teams with multiple apps, anyone who doesn't want to SSH into a server to deploy.
Dokploy — The fast-growing newcomer. Dokploy positions itself as "open-source Vercel alternative" and delivers on that promise. The UI is modern, reactive, and arguably more polished than Coolify's in certain areas. It has built-in templates for popular frameworks (Next.js, Nuxt, Astro, Remix) and supports Git-based deployments. Traefik handles routing and SSL. The project is younger than Coolify but moving fast. Best for: Frontend developers deploying Next.js/Astro/Nuxt apps, those who want a more Vercel-like experience, early adopters willing to deal with a younger project.
CapRover — The mature workhorse. CapRover has been around since 2018 and has the largest production install base. It's battle-tested and stable. The UI is functional but looks dated compared to Coolify and Dokploy. Deployment works via CLI (caprover deploy) or tarball upload. CapRover's advantage: it just works, there are years of Stack Overflow answers and community guides, and the plugin ecosystem (databases, monitoring, logging) is mature. Best for: Teams that value stability over polish, existing CapRover users, production environments where "new and shiny" is a bug not a feature.
Kamal — 37signals' answer to Kubernetes complexity. Kamal (formerly MRSK) is 37signals' deployment tool, designed to be the anti-Kubernetes. Deploy any container to a bare-metal server (or servers) with kamal deploy. Everything is defined in a single deploy.yml file: servers, environment variables, healthchecks, volumes, and accessory services (databases, Redis). No Docker Compose, no Swarm, no Kubernetes — just Docker on a server, with a zero-downtime deployment strategy (boot new container, verify, switch traffic, stop old container). The trade-off: CLI-only, no web dashboard, and it's opinionated about the 37signals way of deploying. Best for: Rails/Laravel/Django developers (37signals' primary audience), CLI-first developers, those who prefer configuration files over web UIs, small teams deploying monoliths (not microservices).
Dokku — The original Heroku on your server. Dokku is the oldest project in this category (2013) and has the most Heroku-compatible workflow: git push dokku main deploys your app. It supports Heroku buildpacks (auto-detect language, install dependencies) and Dockerfile deployments. The plugin system (50+ plugins) covers databases, Let's Encrypt, monitoring, a
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