Overview

Dokku was born in 2013, created by Jeff Lindsay (progrium) and long maintained by Jose Diaz-Gonzalez. It is an open-source (MIT) mini PaaS built on Docker, often called a "single-server Heroku". It gives developers Heroku-grade experience on a single cloud server: git push one-click deployment, Buildpacks builds, automatic domains, and SSL.

Dokku targets individual developers and small teams, letting one VPS host multiple apps with full data control and no vendor lock-in. In Git deployment workflows and containerized deployment, Dokku is a representative low-cost self-hosted PaaS.

Key Strengths

  • Minimal and lightweight: Runs on a single server; a 1GB RAM VPS can host multiple apps, with far lower resource usage than Kubernetes for low-cost self-hosting.
  • git push deployment: Pushing code triggers build, start, and domain binding, with an experience close to Heroku; see Git deployment workflow.
  • Buildpacks compatible: Full support for Heroku Buildpacks and Docker images makes migrating existing Heroku apps nearly free.
  • Automatic SSL: Integrated Let's Encrypt for one-click issuance and automatic renewal, see Certbot SSL setup.
  • Plugin ecosystem: 100+ community plugins cover databases and middleware; database choices can be guided by database selection guide.

Product Ecosystem

Dokku Core Platform

The Docker-based single-server PaaS core supporting Heroku Buildpacks and Dockerfiles; git push completes build, start, domain binding, and certificate configuration, forming the hosting foundation.

Plugin System

One-command installation of database plugins such as postgres, redis, mysql, mariadb, and mongodb, plus middleware like nginx, elasticsearch, and rabbitmq, covering logging, monitoring, storage, and networking.

Dokku CLI and API

Command-line management tools and a RESTful API supporting app creation, deployment, log viewing, and domain management, integrable with CI/CD pipelines such as GitHub Actions and GitLab CI.

Limitations

  • Single-server constraint: No native clustering; high availability and horizontal scaling require external solutions, plan disaster recovery with server backup strategy.
  • Command-line barrier: No web GUI; CLI-driven operation is harder for non-technical users, start with Linux server basics.
  • Complex scenarios limited: Multi-container apps, service mesh, and complex network policies are limited; large apps need custom extensions.
  • Community-driven: Release and documentation cadence depends on the community, with no commercial support or SLA.

Use Cases

  • Individual developers / small-team self-hosting (★★★★★): One VPS, one platform, very low cost, ideal for side projects and internal tools.
  • Heroku migration (★★★★★): Buildpacks compatibility makes migration nearly free for moving from cloud PaaS to self-hosting.
  • Prototypes and internal systems (★★★★★): git push means instant deployment and fast iteration.
  • Large high-availability production (★★): Single-server limits are clear; evaluate Coolify, CapRover, or Kubernetes instead.

Pricing

Item Cost Notes
Dokku software Free (MIT open source) Full PaaS features, no license fee
Running cost $5-20/month One VPS hosts multiple apps
Let's Encrypt SSL Free Automatic issuance and renewal
Commercial support No official channel Relies on community and docs

Note: Dokku has no subscription fee; the main cost is the VPS that hosts it and any managed services.

FAQ

  • What is the difference between Dokku and Heroku? Heroku is a managed cloud PaaS billed by usage with no operations required; Dokku is an open-source self-hosted PaaS requiring your own server but offering cost control and data ownership. Teams leaving Heroku can migrate quickly thanks to Buildpacks compatibility. See the Docker deployment basics.

  • Does Dokku support multi-container apps? Yes. Dokku can run multi-container apps based on Docker images and Compose orchestration; see Compose multi-container deployment.

  • Can Dokku run on multiple servers? Not natively. Dokku is positioned as a single-server PaaS; multi-node high availability requires adding your own load balancing and data replication. See the Kubernetes deployment basics.

  • How do I configure SSL on Dokku? Enable a Let's Encrypt certificate with one Dokku CLI command, which handles issuance, deployment, and renewal automatically; see Certbot SSL setup for details.

  • Dokku vs Coolify / CapRover? All three are open-source self-hosted PaaS options. Dokku is the lightest and closest to command-line and Heroku workflows; Coolify offers a web UI and one-click deployment of many apps; CapRover leans toward an app-store experience; choose by team preference.