Developer Tools · head to head
Dagger vs Docker
Dagger
Developer Tools
Programmable CI/CD engine that runs your pipeline as containers on any runner
- From
- Free
- Rated
- -
Docker
Technology
Accelerate how you build, share, and run applications
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Dagger dagger is not a CI provider, so you keep paying for GitHub Actions or GitLab runners underneath it; the Dagger Cloud subscription is an addition to your CI bill, not a replacement for it.; Docker shared kernel creates security vulnerabilities when containers share the same OS kernel that can bypass container isolation
- They diverge on capability: Dagger covers Pipelines as code, Docker covers Container runtime.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Dagger and Docker actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).
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 Dagger
- Pipelines as code
- Local and CI parity
- Content-addressed caching
- Dagger Functions and modules
- CI-provider agnostic
- Dagger Cloud traces
- GitHub Checks integration
- Container-native execution
Only in Docker
- Container runtime
- Docker Desktop
- Docker Hub
- Docker Compose
- Container images
- Dockerfile
- Docker Swarm
- BuildKit
What people use each for
The jobs each tool is most often brought in to do.
Dagger
- A platform team maintaining near-identical build YAML across forty repositories that wants one versioned module every repository calls insteadnot Docker
- An engineering organisation migrating off a CI provider that does not want to rewrite every pipeline as part of the migrationnot Docker
- A team whose engineers waste hours pushing commits to debug CI-only failures and needs to reproduce the exact run locallynot Docker
- A monorepo where most commits touch a small subset of services and cache-accurate step skipping cuts build minutes materiallynot Docker
Docker
- Application containerizationnot Dagger
- Microservicesnot Dagger
- CI/CD pipelinesnot Dagger
- Development environmentsnot Dagger
- Cloud migrationnot Dagger
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Dagger
- Dagger is not a CI provider, so you keep paying for GitHub Actions or GitLab runners underneath it; the Dagger Cloud subscription is an addition to your CI bill, not a replacement for it.
- Writing pipelines in Go or TypeScript raises the barrier to entry: a release engineer who could edit a YAML step now needs to read code, and the people who can fix a broken build shrink to those comfortable with the SDK.
- The engine runs as a container on the runner and needs a persistent cache volume to deliver its main benefit, so ephemeral CI runners give you correctness without the speed, and provisioning durable cache storage is extra platform work.
- The Team plan caps at ten users and ten million events per month; an organisation of any size crosses that quickly and moves to Enterprise pricing that is not published, so cost at scale is unknowable up front.
- The module ecosystem is young and thinly maintained relative to the marketplace of a mature CI provider, so integrations that exist as a one-line Action often have to be written yourself as a Dagger function.
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
Pricing, plan by plan
Dagger
Free- IndividualFree
- One user
- One million events per month
- Workflow logs and function call traces
- Team$50/month
- Up to ten users
- Ten million events per month
- Module insights and module catalogue
- Enterprise$undefined/year
- Custom user and event limits
- SSO
- Managed single-tenant deployment
Docker
FreeNo published plan breakdown. See the Docker review.
Which should you pick?
Choose Dagger if
- You need pipelines as code.
- You want to start without paying.
- You work on Linux, macOS, Windows, Self-hosted.
- You also want local and ci parity.
Choose Docker if
- You need container runtime.
- You want to start without paying.
- You work on Linux, macOS, Windows.
- You also want docker desktop.
Questions people ask
- Is Dagger or Docker better?
- Neither clearly leads. Dagger starts at Free and Docker at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Dagger or Docker?
- Dagger starts at Free and Docker at Free.
- Does Dagger or Docker run on more platforms?
- Dagger runs on Linux, macOS, Windows, Self-hosted. Docker runs on Linux, macOS, Windows.
- Can I use Dagger for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Dagger best used for?
- Dagger is most often used for a platform team maintaining near-identical build yaml across forty repositories that wants one versioned module every repository calls instead, an engineering organisation migrating off a ci provider that does not want to rewrite every pipeline as part of the migration, a team whose engineers waste hours pushing commits to debug ci-only failures and needs to reproduce the exact run locally, a monorepo where most commits touch a small subset of services and cache-accurate step skipping cuts build minutes materially. Of those, a platform team maintaining near-identical build yaml across forty repositories that wants one versioned module every repository calls instead and an engineering organisation migrating off a ci provider that does not want to rewrite every pipeline as part of the migration are not what Docker is typically brought in for.
- What can Dagger do that Docker cannot?
- Dagger covers Pipelines as code, Local and CI parity, Content-addressed caching, Dagger Functions and modules. Docker covers Container runtime, Docker Desktop, Docker Hub, Docker Compose.
Answered from the vendors’ own pages
Dagger: Does Dagger replace GitHub Actions?
No. Dagger runs inside GitHub Actions or any other CI. It replaces the YAML that describes your pipeline steps, not the trigger and runner layer.
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.
SourceDagger: Is the engine open source?
Yes, the Dagger engine and SDKs are open source and free. Dagger Cloud, the observability product, is what costs money.
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.
SourceDagger: What is an event in the pricing?
Dagger Cloud meters pipeline telemetry events. One million per month is free; the Team plan at 50 USD per month allows ten million.
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.
SourceDagger: Can I run the same pipeline on my laptop?
Yes, that is the main reason teams adopt it. The dagger CLI executes the identical graph locally, so CI-only failures become reproducible.
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.
SourceRelated pages
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