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Coolify vs CapRover vs Dokku 2026

·OSSAlt Team
coolifycaproverdokkupaasself-hostingdockerheroku-alternative2026

Coolify vs CapRover vs Dokku 2026

Heroku killed its free tier in 2022 and developers never looked back — they looked sideways, at self-hosted PaaS platforms that give you the same git-push-to-deploy convenience on hardware you own. Three projects dominate this space: Coolify, CapRover, and Dokku. Each takes a different philosophy to the problem.

This guide covers real feature differences, resource usage, Docker Compose support, and the honest trade-offs so you can pick the right platform for your workload in 2026.

Related: Best Open Source Heroku Alternatives 2026 · How to Self-Host Coolify · Coolify vs Vercel Cost Comparison

What Each Platform Is

Coolify

Coolify (v4+) is a modern self-hosted PaaS with a polished React UI, active development, and broad deployment target support. It can deploy static sites, Dockerfiles, Docker Compose stacks, and even has experimental Kubernetes support. Coolify crossed 35,000 GitHub stars in early 2026, making it the fastest-growing platform in this category.

Key characteristics:

  • Built-in SSL via Let's Encrypt, automatic reverse proxy (Traefik)
  • Database engines (PostgreSQL, MySQL, Redis, MongoDB) with a clean config UI
  • S3-compatible backup destinations built-in
  • Preview environments per git branch
  • Team collaboration with role-based access
  • Deploy from GitHub, GitLab, Bitbucket, or any git remote

CapRover

CapRover uses Docker Swarm under the hood and NGINX as its reverse proxy. Its killer feature is the one-click app marketplace: WordPress, Ghost, Gitea, Postgres, Minio, and 80+ more apps deploy in a single click through the web UI.

Key characteristics:

  • NGINX-based routing with automatic Let's Encrypt
  • One-click app templates marketplace (80+ apps)
  • Docker Swarm clustering for multi-server setups
  • Python-based backend, Node.js CLI (caprover CLI)
  • Webhooks for CI/CD integration
  • Limited Docker Compose support (single-container templates primarily)

Dokku

Dokku is the minimalist option — a single-server PaaS that implements the Heroku build system using buildpacks and Docker. You git push dokku main and it just works. No web UI by default. Everything is SSH and CLI.

Key characteristics:

  • Git push deployment with Heroku buildpacks
  • Smallest resource footprint of the three
  • Rich plugin ecosystem (200+ plugins for databases, storage, networking)
  • SSL via Let's Encrypt plugin
  • Zero-downtime deploys via CHECKS file
  • Stable and mature (10+ years old)

Feature Comparison Table

FeatureCoolifyCapRoverDokku
Web UIFull-featured React UIYes (Python/Vue)None (CLI only)
Git Push DeployYesYes (via webhooks)Native (core feature)
Docker ComposeFull supportLimitedVia plugin
App CatalogServices library80+ one-click apps200+ plugins
Multi-serverYes (agents)Yes (Docker Swarm)Single-server only
Preview EnvironmentsYesNoNo
KubernetesExperimentalNoNo
SSLAuto (Traefik)Auto (Let's Encrypt)Plugin (Let's Encrypt)
BackupBuilt-in S3ManualVia plugin
Team/RBACYesBasicNo
Resource Overhead~400–700MB RAM~300–500MB RAM~100–200MB RAM
LanguagePHP/LaravelPythonShell/Go
LicenseApache 2.0MITMIT
GitHub Stars (2026)~35k~13k~28k

Resource Usage Reality Check

On a 2GB RAM VPS, the overhead at idle:

  • Dokku: ~100–200MB, leaving ~1.7–1.8GB for your apps
  • CapRover: ~300–500MB, leaving ~1.5–1.7GB for your apps
  • Coolify: ~400–700MB, leaving ~1.3–1.6GB for your apps

For tight resource budgets (a $4–6/month Hetzner or DigitalOcean VPS), Dokku's footprint matters. For teams deploying 5+ services with databases, Coolify's management overhead pays for itself.

Docker Compose Support

This is where the platforms diverge most:

Coolify has first-class Docker Compose support. You can paste or link a docker-compose.yml and Coolify handles networking, SSL termination, and environment variable injection. Entire stacks deploy as a unit.

CapRover supports Docker Compose in a limited way — its captain-definition format wraps a single Dockerfile or image. You can deploy multi-container stacks, but it requires the CapRover template syntax, not raw Compose files.

Dokku gains Docker Compose support via the dokku-compose plugin, but it's less integrated than Coolify's native approach.

Docker Compose Setup: All Three

Coolify (runs via Coolify's own installer)

curl -fsSL https://cdn.coollabs.io/coolify/install.sh | bash

After installation, access the UI at port 8000 and connect your server as a deployment target.

CapRover Quick Start

# docker-compose.yml for CapRover install
version: "3.3"
services:
  caprover:
    image: caprover/caprover:latest
    restart: always
    environment:
      - MAIN_NODE_IP_ADDRESS=YOUR_SERVER_IP
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /captain:/captain
    ports:
      - "80:80"
      - "443:443"
      - "3000:3000"

Dokku Install + App Deploy

# Install Dokku
wget -NP . https://dokku.com/bootstrap.sh
sudo DOKKU_TAG=v0.34.x bash bootstrap.sh

# Deploy an app
git remote add dokku dokku@your-server:myapp
git push dokku main

# Add PostgreSQL
sudo dokku plugin:install https://github.com/dokku/dokku-postgres.git
dokku postgres:create mydb
dokku postgres:link mydb myapp

SSL and Reverse Proxy

All three handle SSL automatically:

  • Coolify uses Traefik as the reverse proxy, with automatic Let's Encrypt certificate provisioning. Wildcard certificates are supported for preview environments.
  • CapRover uses NGINX with Let's Encrypt via the certbot plugin. Works out of the box, supports custom domains.
  • Dokku requires the letsencrypt plugin (dokku plugin:install https://github.com/dokku/dokku-letsencrypt.git), then dokku letsencrypt:enable myapp. Auto-renewal works via cron.

Monitoring and Observability

Coolify includes basic metrics in the UI (CPU, memory, network per container) and integrates with Netdata for deeper observability. Log streaming is built-in.

CapRover shows container logs in the web UI but has no built-in metrics. You'd integrate Prometheus/Grafana separately.

Dokku has no built-in monitoring. The dokku-logspout plugin ships logs to external aggregators. You bring your own observability stack.

Pricing: What Self-Hosting Actually Costs

All three are free open-source software. The cost is the server you run them on:

Server SizeUse CaseMonthly Cost
2GB RAM, 1 vCPUDokku: 3–5 small apps~$5–8/mo (Hetzner)
4GB RAM, 2 vCPUCapRover: 5–10 apps~$12–16/mo
8GB RAM, 4 vCPUCoolify: 10–20 apps~$22–32/mo

Compare this to Heroku's Eco dynos at $5/dyno/month, or Railway at ~$5–20/month per service. Self-hosting with any of these platforms breaks even after 2–3 services running continuously.

Coolify Cloud exists at ~$5/month as a managed option, but most users self-host.

Deployment Workflows: CI/CD Integration

Coolify

GitHub Actions or GitLab CI can trigger Coolify deploys via webhook. Coolify also has native GitHub App integration — push to a branch and it redeploys automatically.

CapRover

CapRover generates per-app webhook URLs. Drop the webhook into your GitHub Actions workflow:

- name: Deploy to CapRover
  run: |
    curl -X POST "${{ secrets.CAPROVER_WEBHOOK }}"

Dokku

Dokku uses git push as the deploy primitive. In CI:

- name: Deploy to Dokku
  run: |
    git remote add dokku dokku@$SERVER:$APP
    git push dokku $BRANCH:main

For full zero-downtime deploys, add a CHECKS file to your repo with HTTP health check paths.

When to Choose Each

Choose Coolify if:

  • You want a modern, polished UI for managing multiple apps and services
  • You need Docker Compose stack deployment
  • You want preview environments per branch
  • You're managing a team and need RBAC
  • You're migrating from Vercel/Netlify and want familiar DX

Choose CapRover if:

  • You want the fastest path to deploying common open-source apps (WordPress, Ghost, etc.)
  • You need basic multi-server clustering via Docker Swarm
  • You prefer NGINX over Traefik
  • Your team is comfortable with occasional CLI work

Choose Dokku if:

  • You're a solo developer who loves the CLI
  • You're migrating a Heroku app and want identical behavior
  • Resource efficiency is paramount (tiny VPS or Raspberry Pi)
  • You want the most mature, battle-tested codebase
  • You don't need a web UI

What About Dokploy?

A fourth contender worth mentioning is Dokploy, which launched in 2024 and has gained momentum. Dokploy is similar to Coolify but with a simpler architecture and faster initial setup. For teams evaluating in 2026, the comparison is often Coolify vs Dokploy for new deployments.

Security and Hardening

Running a PaaS means your server handles both the control plane (deploy jobs, secrets injection) and the application plane (running user-facing services). Security posture matters.

Coolify Security

Coolify uses Traefik with automatic HTTPS redirects and supports custom Traefik rules for rate limiting, IP allowlisting, and middleware. The admin panel should always be placed behind a firewall or accessible only via VPN or Tailscale. Coolify supports SSH key-based server connections — never use password auth.

Sensitive data (deploy keys, environment variables) is encrypted at rest in Coolify's database. Enable 2FA on your Coolify admin account.

CapRover Security

CapRover exposes a management dashboard on port 3000. This port should be restricted to your IP only via firewall rules after initial setup:

# Restrict CapRover admin port to your IP only
ufw allow from YOUR_IP to any port 3000
ufw deny 3000

CapRover generates a random password on first install. Rotate it immediately and store it in a password manager.

Dokku Security

Dokku's attack surface is minimal — SSH is the primary interface. Harden the SSH configuration:

# /etc/ssh/sshd_config hardening
PermitRootLogin no
PasswordAuthentication no
AllowUsers dokku your_admin_user

Use dokku apps:report myapp to audit deployed apps' environment variables and ensure no secrets are exposed.

Database Management

All three platforms can host databases alongside your applications, but with different ergonomics:

Coolify has a built-in database services panel — spin up PostgreSQL, MySQL, Redis, MongoDB, or MariaDB with one click. Connection strings are injected automatically into dependent services. Automated S3 backups are configurable per database.

CapRover offers databases as one-click apps from its marketplace. The database is a Docker container in your stack, configured through the app template. Backups are manual via docker exec.

Dokku has dedicated database plugins for PostgreSQL, MySQL, Redis, and MongoDB. The workflow is CLI-based:

# Create and link a PostgreSQL database
sudo dokku plugin:install https://github.com/dokku/dokku-postgres.git
dokku postgres:create myapp-db
dokku postgres:link myapp-db myapp

# Create an automated backup to S3
dokku postgres:backup-set-public-key-encryption myapp-db backup.pub
dokku postgres:backup myapp-db s3://my-bucket/backups

Community and Support

Coolify: Most active community. Discord server with 12,000+ members, responsive maintainers, weekly releases. Documentation has improved dramatically since v4.

CapRover: Solid community on GitHub and forums. Development pace has slowed somewhat, but the platform is stable and well-documented.

Dokku: Quiet but deep community. Most questions are answered in GitHub issues. The plugin ecosystem is the most extensive, with a dedicated plugin repository.

Migration Considerations

Moving from Heroku to Dokku: Easiest migration. Most Heroku buildpack apps work with zero changes. Procfile, environment variables, and PostgreSQL add-on replacement are all supported.

Moving from Heroku to Coolify: Slightly more involved — you'll need a Dockerfile or Docker Compose file. Coolify can build from a Dockerfile, so most Node.js, Python, and Ruby apps need only minor adjustments.

Moving from CapRover to Coolify: Feasible but manual. Export your environment variables, recreate apps in Coolify, point DNS. No automated migration tooling exists.

Verdict

Coolify is the best choice for 2026 for most teams. It has the most active development, the cleanest UI, and the broadest feature set including Docker Compose stacks, preview environments, and built-in backups.

CapRover is still a strong pick if you lean heavily on its one-click app marketplace and want multi-server Docker Swarm clustering without the complexity of Kubernetes.

Dokku remains unbeatable for solo developers and minimal setups. It's been stable for a decade, the plugin ecosystem covers almost every need, and nothing else runs as lean on a budget VPS.

The core question: if you're starting from scratch today, use Coolify. If you're migrating a Heroku app and want the path of least resistance, use Dokku. If you're building an internal app platform for non-technical colleagues who need one-click apps, use CapRover.

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