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Docker vs Ubuntu

Docker logo

Docker

Software

Accelerate how you build, share, and run applications

From
Free
Rated
-
Full reviewWebsite
Ubuntu logo

Ubuntu

Software

Enterprise Linux distribution with 15-year support options.

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Docker shared kernel creates security vulnerabilities when containers share the same OS kernel that can bypass container isolation; Ubuntu free version supported only by community; no official Canonical support without Pro subscription

Where they differ

Only the attributes on which Docker and Ubuntu actually diverge.

Attributes where Docker and Ubuntu differ
AttributeDockerUbuntu
Pricing modelUnknownfreemium
PlatformsLinux, macOS, WindowsDesktop, Server, Cloud, IoT, Edge, WSL
Founded2010Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Docker

  • Container runtime
  • Docker Desktop
  • Docker Hub
  • Docker Compose
  • Container images
  • Dockerfile
  • Docker Swarm
  • BuildKit

Only in Ubuntu

Nothing recorded that Docker does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Docker

  • Application containerizationnot Ubuntu
  • Microservicesnot Ubuntu
  • CI/CD pipelinesnot Ubuntu
  • Development environmentsnot Ubuntu
  • Cloud migrationnot Ubuntu

Ubuntu

  • Individual developers and small teams using free Ubuntu for laptops and serversnot Docker
  • Cloud and data centre deployments requiring certified, supported Linux operating systemnot Docker
  • Organisations needing FIPS-certified or DISA-STIG-hardened Linux for government and regulated environmentsnot Docker
  • AI and machine learning teams using Ubuntu Desktop with pre-optimised toolchainsnot Docker
  • IoT and edge computing deployments using Ubuntu Corenot Docker

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Docker

  • Shared kernel creates security vulnerabilities when containers share the same OS kernel that can bypass container isolation
  • Daemon socket exposure grants full root access to the host if compromised
  • Requires careful secrets management - credentials embedded in images or environment variables are easily harvested by attackers
  • Resource management complexity - misbehaving or compromised containers can consume all resources causing denial of service
  • Orchestration complexity - Docker Swarm is less capable than Kubernetes, requiring external tools for production deployments

Ubuntu

  • Free version supported only by community; no official Canonical support without Pro subscription
  • Ubuntu Pro required for enterprise compliance certifications (FIPS, DISA-STIG); free version does not include these
  • Ubuntu Pro pricing is proprietary and varies based on cloud deployment (AWS, Azure, GCP); no published per-machine or per-user pricing
  • Ubuntu Pro + Support adds 24/7 support costs on top of base subscription; total cost for enterprise-grade support not transparent
  • Personal/free tier limited to 5 machines; any larger deployment requires paid enterprise subscription

Pricing, plan by plan

Docker

Free

No published plan breakdown. See the Docker review.

Ubuntu

Free
  • Ubuntu (Free)Free
    • Desktop, Server, Core and Cloud editions
    • Community support
    • Standard security updates (5 years LTS)
  • Ubuntu Pro (Personal)Free
    • Extended Security Maintenance (10 years)
    • Kernel Livepatch
    • Landscape management
  • Ubuntu Pro (Enterprise)$null/variable
    • 10 years Extended Security Maintenance
    • FIPS 140, DISA-STIG, CIS compliance
    • Kernel Livepatch
  • Ubuntu Pro + Support$null/variable
    • All Ubuntu Pro features
    • 24/7 break-fix and bug-fix support
    • Expert assistance for infrastructure and applications

Which should you pick?

Choose Docker if

  • You need container runtime.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want docker desktop.
Docker review

Choose Ubuntu if

  • You want to start without paying.
  • You work on Desktop, Server, Cloud, IoT, Edge, WSL.
Ubuntu review

Questions people ask

Is Docker or Ubuntu better?
Neither clearly leads. Docker starts at Free and Ubuntu at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Docker or Ubuntu?
Docker starts at Free and Ubuntu at Free.
Does Docker or Ubuntu run on more platforms?
Docker runs on Linux, macOS, Windows. Ubuntu runs on Desktop, Server, Cloud, IoT, Edge, WSL.
Can I use Docker for free?
Both have a free tier, so you can try either at no cost before committing.
What is Docker best used for?
Docker is most often used for application containerization, microservices, ci/cd pipelines, development environments. Of those, application containerization and microservices are not what Ubuntu is typically brought in for.
What can Docker do that Ubuntu cannot?
Docker covers Container runtime, Docker Desktop, Docker Hub, Docker Compose.

Answered from the vendors’ own pages

Docker: What is Docker pricing?

Docker offers a freemium model with Docker Personal free, Docker Pro at $11/user/month, Docker Team at $16/user/month, and Docker Business at $24/user/month. Each tier includes Docker Desktop, Docker Hub, and Docker Scout with different usage limits.

Source
Ubuntu: Is Ubuntu free?

Yes. Ubuntu is free to download and use in all editions. Community support is also available at no cost. Ubuntu Pro subscriptions are optional and provide extended support and compliance tools.

Source
Docker: Can I use Docker in production?

Yes. Docker is used extensively in production environments. However, for container orchestration at scale, Kubernetes is typically paired with Docker to automate deployment, scaling, and management across clusters.

Source
Ubuntu: How long is Ubuntu LTS support?

Standard Ubuntu LTS releases receive 5 years of security maintenance. Ubuntu Pro extends this to 10 years, expandable to 15 years with the Legacy add-on.

Source
Docker: What are the main security concerns with Docker?

Key security risks include container breakout vulnerabilities through shared kernel exploits, daemon socket exposure that grants root access if compromised, weak isolation between containers, and credential leakage if secrets are embedded in images.

Source
Ubuntu: What compliance certifications does Ubuntu Pro provide?

Ubuntu Pro provides compliance tools for FIPS 140, DISA-STIG, CIS, FedRAMP and PCI-DSS standards.

Source
Docker: Does Docker integrate with CI/CD systems?

Yes. Docker integrates with Jenkins, GitHub, and other CI/CD systems. The typical workflow involves GitHub repositories triggering automated builds in Jenkins, which prepare Dockerfiles and push images to Docker Hub for deployment.

Source
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