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dockcheck vs What's Up Docker: catalog facts
dockcheck	What's Up Docker
Free Free and published on GitHub.	Free Free and open source under the MIT licence.
Linux, Command line	Web, Self-hosted
Checks for updates without pre-pulling images Interactive or fully unattended operation	Supports Docker, Compose, Swarm, Kubernetes and Nomad Works with most public registries and self-hosted OCI registries
Command-line only, no graphical interface Works with Docker containers only	Needs to run as its own container or service Automatic updates can break setups if images change behaviour
Downloadable app	Self-hosted
Open source	Open source
License not stated	License: MIT
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.