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Lambda (AWS Serverless) vs Docker

Lambda (AWS Serverless) logo

Lambda (AWS Serverless)

Software

Run code without thinking about servers

From
Free
Rated
-
Full reviewWebsite
Docker logo

Docker

Software

Accelerate how you build, share, and run applications

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Lambda (AWS Serverless) billed on two axes at once, $0.20 per million requests plus $0.0000166667 per GB-second of duration, so memory settings change the bill as much as traffic does; Docker shared kernel creates security vulnerabilities when containers share the same OS kernel that can bypass container isolation
  • They diverge on capability: Lambda (AWS Serverless) covers Function-as-a-Service, Docker covers Container runtime.

Where they differ

Only the attributes on which Lambda (AWS Serverless) and Docker actually diverge.

Attributes where Lambda (AWS Serverless) and Docker differ
AttributeLambda (AWS Serverless)Docker
Pricing modelusage-basedUnknown
PlatformsWeb, ApiLinux, macOS, Windows
Founded20142010

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 Lambda (AWS Serverless)

  • Function-as-a-Service
  • Event-driven execution
  • Auto-scaling
  • Pay-per-use
  • Multiple languages
  • Concurrency limits
  • Dead Letter Queues
  • Environment variables

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.

Lambda (AWS Serverless)

  • Event-driven functions without managing serversnot Docker
  • API backends behind API Gatewaynot Docker
  • Processing S3, DynamoDB, SQS and Kinesis eventsnot Docker
  • Scheduled jobs without a always-on instancenot Docker
  • Edge compute through Lambda@Edgenot Docker

Docker

  • Application containerizationnot Lambda (AWS Serverless)
  • Microservicesnot Lambda (AWS Serverless)
  • CI/CD pipelinesnot Lambda (AWS Serverless)
  • Development environmentsnot Lambda (AWS Serverless)
  • Cloud migrationnot Lambda (AWS Serverless)

Where each one falls short

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

Lambda (AWS Serverless)

  • Billed on two axes at once, $0.20 per million requests plus $0.0000166667 per GB-second of duration, so memory settings change the bill as much as traffic does
  • Provisioned concurrency, used to avoid cold starts, is charged separately at $0.0000041667 per GB-second whether or not the function runs
  • Ephemeral storage beyond the included 512 MB is metered
  • Lambda@Edge costs $0.60 per million requests, three times the standard request rate
  • VPC use and cross-region data transfer carry EC2 charges on top

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

Lambda (AWS Serverless)

Free
  • Free TierFree
    • 1M free requests/month
    • 400,000 GB-seconds/month
    • Always free

Docker

Free

No published plan breakdown. See the Docker review.

Which should you pick?

Choose Lambda (AWS Serverless) if

  • You need function-as-a-service.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want event-driven execution.
Lambda (AWS Serverless) review

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

Questions people ask

Is Lambda (AWS Serverless) or Docker better?
Neither clearly leads. Lambda (AWS Serverless) 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, Lambda (AWS Serverless) or Docker?
Lambda (AWS Serverless) starts at Free and Docker at Free.
Does Lambda (AWS Serverless) or Docker run on more platforms?
Lambda (AWS Serverless) runs on Web, Api. Docker runs on Linux, macOS, Windows.
Can I use Lambda (AWS Serverless) for free?
Both have a free tier, so you can try either at no cost before committing.
What is Lambda (AWS Serverless) best used for?
Lambda (AWS Serverless) is most often used for event-driven functions without managing servers, api backends behind api gateway, processing s3, dynamodb, sqs and kinesis events, scheduled jobs without a always-on instance. Of those, event-driven functions without managing servers and api backends behind api gateway are not what Docker is typically brought in for.
What can Lambda (AWS Serverless) do that Docker cannot?
Lambda (AWS Serverless) covers Function-as-a-Service, Event-driven execution, Auto-scaling, Pay-per-use. 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
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
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
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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