Docker packages applications and their dependencies into containers that run the same everywhere. Docker Desktop, the Docker Engine, Docker Hub, Compose and Build Cloud form the toolkit most teams use for local development, CI and deployment. Docker now also provides sandboxes for running AI coding agents safely.
Key features
- Docker Desktop and Engine
- Docker Compose for multi-container apps
- Docker Hub image registry
- Build Cloud for faster builds
- Cloud Sandboxes for AI agents (late Sep 2026)
- Sandbox Kit: open spec packaging agent permissions as OCI images
Who it's for
Docker suits nearly every software team, from solo developers to enterprises, and now teams running AI coding agents.
Common use cases
- Consistent local dev environments
- CI/CD builds
- Shipping microservices
- Isolating AI coding agents
Pricing
Docker is freemium: it's free for personal use, with paid Team and Business plans. Check the official site for current plan details.
Why Docker is trending
In October 2026, InfoQ covered Docker's open Sandbox Kit spec, which packages agent permissions as OCI images; Docker Cloud Sandboxes launched in late September 2026.
Sources: www.infoq.com, www.docker.com
How to get started with Docker
- Visit the official Docker website at https://www.docker.com and read the quickstart in the docs.
- Sign up or install it, depending on whether you use the hosted service or the open-source version.
- Try it on a small project first, then connect it to your existing stack and CI.
- Review the pricing page before scaling usage so costs stay predictable.
Is Docker worth it?
Docker is a well-established tool with an active team and frequent releases in October 2026. For teams that match the use cases above, it's worth evaluating against the alternatives listed here, and the freemium model makes it easy to try before committing.
Alternatives
- Podman: daemonless container engine
- OrbStack: fast Docker Desktop alternative for Mac
FAQ
What is Docker?
Docker is the standard toolkit for building, running and shipping containerized apps, now with sandboxes for safely running AI coding agents.
Is Docker free?
Docker is free for personal use; teams and businesses pay.
What is a Docker container?
A lightweight package of an app and its dependencies that runs consistently anywhere.
What are Docker Sandboxes?
Isolated environments for safely running AI coding agents, locally or in the cloud.