Docker turned environment drift into a solved problem: the image you test is the image that runs, and onboarding a new developer stops being a two-day ritual. The ecosystem of prebuilt images covers almost everything, and Compose makes a local stack of five services a single file.
Who it is for
A backend team that needs identical environments on three developers' laptops and in CI.
Key features
- Container images built from a Dockerfile
- Compose runs multi-service stacks locally
- Registry hosts and distributes images
- Desktop app for Mac and Windows
- Volume and network management
- Desktop license required for large firms
Where it falls short
Docker Desktop's licence is no longer free for larger companies, and the Desktop VM eats memory and battery on macOS and Windows in a way that Linux users never see.
Pricing
Engine and CLI are free; Docker Desktop needs a paid subscription for companies above a revenue or headcount threshold, and personal use stays free.
Prices move; the tier structure is the part that stays true. Check current pricing on Docker.
Alternatives to Docker
Frequently asked
Is Docker free?
Partly. Engine and CLI are free; Docker Desktop needs a paid subscription for companies above a revenue or headcount threshold, and personal use stays free.
What is Docker best for?
A backend team that needs identical environments on three developers' laptops and in CI.
What are the best alternatives to Docker?
The closest substitutes we list are Neon and Railway. They sit in a similar price bracket but make a different trade-off, so read the weaknesses section of each review before switching.
Which platforms does Docker run on?
Docker is available on macOS, Windows and Linux.