CapRover vs Dokku vs Coolify (2026)

TL;DR

All three are solid open source Heroku alternatives. Dokku is the simplest and lightest — pure CLI, minimal overhead, git push and forget. CapRover adds a web UI and one-click app marketplace. Coolify is the most feature-rich with 280+ templates, preview deployments, and active development. Choose Dokku for simplicity, CapRover for app store, Coolify for the closest Vercel-like experience.

Key Takeaways

• Dokku: Lightest, CLI-only, Heroku buildpack compatible, ~31K GitHub stars — ideal for developers who live in the terminal
• CapRover: Web UI + CLI, one-click apps, Docker Swarm cluster support, ~14K stars — great middle ground
• Coolify: Full-featured, 280+ templates, preview deployments, active development, ~44K stars — best Vercel/Netlify replacement
• All three: free, open source, git push to deploy, auto SSL, custom domains
• 2026 recommendation: Coolify for new projects; Dokku for minimal setups; CapRover fills the gap between them

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Why Leave Heroku?

Heroku ended its free tier in November 2022. The cheapest Heroku plan is now $5/dyno/month — and that's for a single lightweight container. A typical app (web + worker + Postgres) runs $30-50/month on Heroku.

The self-hosted alternatives provide equivalent capability for $6-15/month total (VPS cost).

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Comparison Table

Feature	Dokku	CapRover	Coolify
GitHub Stars	~31K	~14K	~44K
License	MIT	Apache 2.0	Apache 2.0
Interface	CLI only	Web UI + CLI	Web UI + CLI
Git push deploy	✅	✅	✅
Heroku buildpacks	✅	✅	Via Nixpacks
Dockerfile support	✅	✅	✅
Docker Compose	✅	❌	✅
One-click apps	❌ (plugins)	✅ (~100)	✅ (280+)
Preview deployments	❌	❌	✅
Multi-server	Via clustering	✅ (Swarm)	✅ (Swarm exp.)
Auto SSL	✅	✅	✅
Resource usage	Minimal	Medium	Medium-high
Plugin ecosystem	Large	Medium	Growing
Active development	Moderate	Slowing	Very active

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Dokku: The Minimalist's Choice

Dokku is the original Heroku-on-your-own-server. Created in 2013, it implements the Heroku workflow (git push, buildpacks, procfiles) on a single Linux machine. With ~31,000 GitHub stars and over a decade of production use, it's the most battle-tested option.

What Makes Dokku Great

Absolute simplicity. Dokku is a ~500KB shell script (plus Docker). On a $6/month VPS, it runs Postgres, Redis, and multiple Node.js apps with minimal overhead. There's no UI to maintain, no extra containers, no complexity.

Heroku buildpack compatibility. If you have an existing Heroku app, it likely deploys to Dokku without changes. The same Procfile, the same buildpacks, the same heroku config style env vars.

Mature plugin ecosystem. Need Postgres? dokku plugin:install postgres. Redis? Same. Let's Encrypt SSL? Built-in. The plugin system has been around for 10 years and covers virtually every need.

Deploying with Dokku

# Install (Ubuntu 24.04):
wget -NP . https://dokku.com/bootstrap.sh
sudo DOKKU_TAG=v0.35.0 bash bootstrap.sh

# Create an app:
dokku apps:create myapp

# Set environment variables:
dokku config:set myapp DATABASE_URL=postgresql://...

# Create a Postgres database:
dokku plugin:install https://github.com/dokku/dokku-postgres.git postgres
dokku postgres:create mydb
dokku postgres:link mydb myapp

# Enable SSL (Let's Encrypt):
dokku plugin:install https://github.com/dokku/dokku-letsencrypt.git
dokku letsencrypt:enable myapp

# Push from your local machine:
git remote add dokku dokku@YOUR_SERVER_IP:myapp
git push dokku main

That's it. The app is live at https://myapp.yourdomain.com.

Dokku Limitations

• No web UI — everything via SSH commands (loved by some, hated by others)
• No Docker Compose — apps are single-container; multi-service apps need multiple Dokku apps linked together
• No preview deployments — there's no built-in PR preview URL feature
• Single-server focus — multi-server clustering exists but is not Dokku's strength

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CapRover: The Balanced Middle Ground

CapRover sits between Dokku's minimalism and Coolify's feature-richness. It adds a web UI, a one-click app marketplace, and Docker Swarm clustering while keeping the setup simple.

What Makes CapRover Great

Web UI. For teams where not everyone is comfortable with SSH, CapRover's dashboard provides a visual interface for deploying apps, setting env vars, managing databases, and viewing logs.

One-click app store. ~100 pre-configured apps (Postgres, Redis, Ghost, Mattermost, Gitea, etc.) installable in one click from the UI — no Docker Compose needed.

Docker Swarm clustering. CapRover's multi-server support is more production-ready than Dokku's. Add worker nodes from the dashboard and deploy replicated apps across them.

Deploying with CapRover

# Install (Ubuntu 24.04, must be root):
docker run -e BY_PASS_PROXY_CHECK='TRUE' \
  -v /var/run/docker.sock:/var/run/docker.sock \
  caprover/caprover-cli caprover serversetup

# CLI deployment:
npm install -g caprover
caprover deploy  # From your app directory

Or push via captain-definition file in your repo:

{
  "schemaVersion": 2,
  "dockerfilePath": "./Dockerfile"
}

# git push style:
git push caprover main  # Works after setting up the git remote

CapRover Limitations

• No Docker Compose — single-container apps only (biggest limitation)
• Development slowing — CapRover's GitHub activity has slowed compared to 2022-2023; Coolify has overtaken it in features and community
• No preview deployments — PR preview URLs require manual setup

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Coolify: The Vercel Replacement

Coolify is the most actively developed option, with ~44,000 GitHub stars and a weekly release cadence. It's the closest open source equivalent to Vercel/Netlify/Heroku.

What Makes Coolify Great

280+ one-click templates. The largest app library of any self-hosted PaaS — databases, analytics, monitoring, productivity tools, and more.

Preview deployments. Coolify generates PR preview URLs automatically, matching Vercel's workflow. Each pull request gets its own deployment with a unique URL.

Docker Compose support. Unlike Dokku and CapRover, Coolify handles multi-container Docker Compose files natively — useful for any app with more than one service.

Active development. Coolify ships improvements weekly. The codebase is modern (PHP/Laravel + React), well-documented, and the community is large.

Deploying with Coolify

Everything through the web UI:

1. Connect GitHub repo
2. Set domain + env vars
3. Click Deploy

Or via API/CLI for automation. Git push auto-deploy is configured from the dashboard.

Coolify Limitations

• Docker Swarm experimental — multi-node deployments work but are marked experimental
• Higher resource usage — Coolify itself consumes ~200-400MB RAM (vs Dokku's ~50MB)
• Complexity — more options means more surface area to configure correctly

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Decision Guide

Choose Dokku if:
  → You're a solo developer or small team comfortable with CLI
  → You want the lightest possible overhead ($6 VPS, no wasted RAM)
  → You're migrating directly from Heroku (buildpack compatibility)
  → You value 10+ years of battle-tested stability
  → You don't need a web UI or preview deployments

Choose CapRover if:
  → Your team needs a UI but Coolify feels like overkill
  → You want Docker Swarm clustering with less complexity than Coolify
  → Your apps are single-container (no Docker Compose needed)
  → You're okay with slower feature development

Choose Coolify if:
  → You want the closest experience to Vercel/Heroku/Netlify
  → You need preview deployments (PR URLs)
  → You want 280+ one-click service templates
  → You're deploying Docker Compose apps
  → Active development and community support matter
  → You're comfortable with more features = more to configure

Consider Dokploy if:
  → Docker Swarm is a first-class requirement
  → You want native multi-node scaling from day one
  → (See our [Dokploy vs Coolify comparison](/guides/dokploy-vs-coolify-self-hosted-paas-2026))

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Quick Setup Summary

Platform	Time to First Deploy	Minimum VPS
Dokku	~10 minutes	512 MB RAM ($4/mo)
CapRover	~15 minutes	1 GB RAM ($6/mo)
Coolify	~20 minutes	2 GB RAM ($6-9/mo)

All three provide free alternatives to Heroku's $5-50+/month plans.

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Total Cost of Ownership Beyond Hosting Fees

When evaluating Heroku alternatives, most comparisons focus on the infrastructure cost difference — and it is substantial. A typical Heroku setup for a three-service app (web, worker, Postgres) runs $30–50/month on Heroku's current pricing. The equivalent self-hosted setup runs on a $6–9/month VPS.

But the full cost comparison needs to include operational time. Heroku charges a premium partly because it handles operational work: certificate renewal, server patching, container health management, and database maintenance. Self-hosting transfers these responsibilities to your team.

The honest accounting: Coolify reduces the operational overhead significantly compared to bare-metal Docker management, but it does not eliminate it. Budget about 30–60 minutes per month for updates, monitoring reviews, and occasional troubleshooting. Over a year, that is roughly 10 hours. At any reasonable engineering hourly rate, that time cost is easily justified by the monthly savings — but it is a real cost to acknowledge.

For solo developers and small teams, the math almost always favors self-hosting. For larger organizations making cost decisions at scale, the right comparison is not Heroku vs VPS cost — it is infrastructure engineer time plus VPS cost vs Heroku cost. At high team scale, Heroku (or Render, Railway, or Fly.io for a more modern alternative) may still be competitive.

Dokku is the least operationally demanding of the three options because it is the simplest. There is less surface area to manage: no web UI to update, no template library to maintain, no cluster configuration to troubleshoot. For developers who are comfortable with SSH and CLI tools, Dokku's operational cost is genuinely close to zero once set up.

Security Considerations for Self-Hosted PaaS

Running your own deployment platform introduces security responsibilities that Heroku handles automatically.

All three platforms (Dokku, CapRover, Coolify) depend on Docker, and Docker security is a topic in itself. Key practices: run containers as non-root users where possible, use read-only filesystem mounts for containers that do not need write access, keep Docker and host OS packages updated, and enable automatic security updates on your VPS.

The web UIs of CapRover and Coolify are themselves attack surfaces. Both run on your server and provide privileged access to your entire infrastructure. Restrict access to the admin panels: either put them behind VPN, use IP allowlisting, or at minimum enable two-factor authentication for admin accounts. Never expose the Docker socket to containers that do not need it.

For teams deploying multiple applications, consider isolating critical services — databases, secret stores — on separate VPS instances from the PaaS itself. This limits blast radius if the deployment platform is ever compromised.

Dokku's lack of a web UI is a security advantage in this specific respect: there is no web interface to expose. Remote access is via SSH with key-based authentication, which is straightforward to lock down correctly.

If you're building out a broader self-hosted infrastructure stack and want to understand how deployment platforms fit into a complete architecture, the startup open source stack guide covers how deployment platforms combine with databases, analytics, and other services into a coherent whole. For a deeper cost comparison between Coolify and Vercel specifically, the Coolify vs Vercel cost analysis has detailed numbers across different usage scenarios.

For teams considering Dokploy as an alternative to these three options — particularly if Docker Swarm multi-node scaling is a priority — the Dokploy vs Coolify comparison covers the tradeoffs in detail.

Self-hosted PaaS deployment does not happen in isolation. The applications you deploy need databases, object storage, authentication, and monitoring. The complete business stack under $50/month guide shows how Coolify, Dokku, or CapRover fits into a broader self-hosted stack alongside PostgreSQL, Redis, analytics tools, and the communication platforms that a team needs to operate. The deployment platform is the foundation, and understanding how it fits with the other components of your infrastructure is as important as choosing which one to use.

Backup and disaster recovery. The PaaS platform manages application deployments, but application data — databases, uploaded files, configuration — requires separate backup infrastructure. All three platforms are designed to manage stateless containers; stateful data lives in Docker volumes or external databases. Configure automated Docker volume backups to S3-compatible storage using a scheduled restic or rclone job. For databases, a daily pg_dump piped to your backup storage provides point-in-time recovery. Test restoration quarterly — a backup you have never restored is a backup you cannot rely on. For the full backup strategy alongside self-hosted deployments, the self-hosting security checklist 2026 covers backup configuration alongside other hardening steps.

Zero-downtime deployments. Production applications require deployments that do not interrupt service for users actively using the application. Coolify supports rolling deployments using Docker's health check system — the new container must pass health checks before the old one is stopped. Dokku's rolling deploys work similarly when you configure health checks. CapRover's deployment process replaces the old container with the new one with minimal downtime, typically a few seconds during the container switch. For true zero-downtime deployments with no connection dropping, configure a load balancer between your PaaS and users — two running container instances behind a reverse proxy allow the old instance to drain connections while the new one starts. Caddy's reverse proxy handles this gracefully for most web application traffic patterns.

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See all open source Heroku alternatives at OSSAlt.com/alternatives/heroku.

See open source alternatives to Dokku on OSSAlt.