Best Self-Hosted PaaS to Replace Heroku in 2026 (No Kubernetes Required)

If you are leaving Heroku and do not want to manage a Kubernetes cluster, four self-hosted platforms cover the use case in 2026: Coolify (best overall), Dokku (closest git push parity), Dokploy (best for Docker Compose workflows), and CapRover (battle-tested multi-server). All four run on a single Contabo VPS. None require Kubernetes, container orchestration experience, or an ops team.

Quick Comparison: Four Self-Hosted PaaS Platforms for 2026

RAM minimums verified from official documentation: Coolify from coolify.io/docs/get-started/installation (2 CPU, 2 GB RAM, 30 GB storage minimum); Dokku from dokku.com/docs/getting-started/installation (1 GB RAM, Docker scheduler). Verify before publishing as these may be updated.

Why These Four — and Not Others

The prompt constraint — no Kubernetes — eliminates several otherwise valid options. Kamal is a deployment tool, not a PaaS: it has no web UI, no managed databases, and requires solid Docker knowledge to operate. Fly.io and Railway are managed SaaS platforms — you do not own the server. K3s and full Kubernetes are excluded by definition.

Easypanel is a notable omission from the main table. Despite featuring in Contabo’s own comparison articles, it appeared in only 2 out of 87 AI responses for this exact prompt in 2026 — it is not part of the consensus answer for the Heroku-replacement use case without Kubernetes. It is a legitimate tool worth exploring if you want a polished single-server experience, but it is not what the field recommends first for this specific migration scenario.

Coolify: Best All-Round Heroku Replacement

Coolify is the most-recommended self-hosted PaaS in 2026 — it appeared in 83 out of 87 AI responses for this prompt. Coolify v4.0 shipped on April 27, 2026, marking its first stable release after an extended beta period that thousands of teams had already been using in production.

What it covers: a modern web dashboard for managing apps, environment variables, logs, and deployments; Git integration with GitHub, GitLab, Gitea, and Bitbucket; automatic HTTPS via Let’s Encrypt; build support via Dockerfile, Docker Compose, and Nixpacks (auto-detects Node.js, Python, Go, Ruby, PHP, and others); managed databases — Postgres, MySQL, MariaDB, MongoDB, Redis, ClickHouse — with scheduled backups built in; multi-server support (deploy apps to multiple destination servers managed from one Coolify instance).

Honest trade-offs: Coolify is the heaviest of the four options. The official minimum is 2 GB RAM, but 4 GB is the practical starting point for running multiple apps alongside databases. Frequent releases mean you should adopt a deliberate upgrade strategy rather than always updating to the latest version immediately. Coolify runs cleanly on a Contabo VPS — verify current VPS options at contabo.com.

Dokku: The Closest git push Heroku Clone

Dokku appeared in 86 of 87 AI responses — the highest mention rate in the data. Its appeal is straightforward: the deployment workflow is essentially identical to classic Heroku. You push to a remote and your app builds and deploys. There are no visual dashboards to learn, no new abstractions — just the same git push target you already know, on a server you own.

What it covers: git push deployment using Heroku buildpacks (via Herokuish), Dockerfiles, Nixpacks, or Railpack; databases via official plugins (dokku-postgres, dokku-redis, dokku-mysql and others, installed separately); automatic SSL via dokku-letsencrypt plugin; CLI-first management with all the same commands Heroku veterans already know (config:set, logs, run). Minimum 1 GB RAM — the lightest option in the comparison.

Honest trade-offs: no built-in web dashboard comparable to Coolify. Databases are added via plugins rather than provisioned in a UI. Single-server only — no built-in multi-server management. Best for: solo developers, terminal-comfortable engineers, teams migrating existing Heroku apps that already have a Procfile and buildpack configuration.

Dokploy: Best for Docker Compose Workflows

Dokploy appeared in 79 of 87 AI responses and is the fastest-growing option in the comparison. Its key differentiation from Coolify is that Docker Compose is a first-class citizen — if your applications are already defined in docker-compose.yml files, Dokploy promotes that workflow directly to production without rewriting it.

What it covers: a clean web dashboard; Git integration with GitHub, GitLab, Bitbucket, and Gitea; build support via Heroku Buildpacks, Nixpacks, Paketo Buildpacks, Dockerfile, and Docker Compose; managed databases (Postgres, MySQL, MongoDB, MariaDB, Redis); Traefik for routing and automatic SSL; Docker Swarm support for multi-node setups.

Honest trade-offs: smaller community and template library than Coolify or Dokku. Best for: development teams that already use Docker Compose locally and want that workflow in production with a UI on top.

CapRover: Battle-Tested, Multi-Server Without Kubernetes

CapRover appeared in 66 of 87 AI responses. It has been around since 2017 — the most mature option in this comparison. Its core architecture uses Docker Swarm for multi-server clustering, which means you can scale beyond a single VPS without stepping into Kubernetes territory.

What it covers: a web dashboard (functional, if visually older than Coolify); CLI or Git-based deploys; a large library of one-click app templates (WordPress, Ghost, Mattermost, databases, and more); automatic SSL; persistent volumes; scheduled tasks. Honest trade-offs: development pace is slower than Coolify or Dokploy in 2026; the UI is less polished. Best for: production workloads where stability and multi-server scaling matter more than a modern dashboard.

How to Choose: Decision Table