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Watchtower vs dockcheck: catalog facts
Watchtower	dockcheck
Free Free and open source.	Free Free and published on GitHub.
Linux, Self-hosted	Linux, Command line
Keeps running containers updated without manual pulls Actively maintained continuation of the original Watchtower	Checks for updates without pre-pulling images Interactive or fully unattended operation
Automatic updates can introduce breaking changes without warning Not designed for controlled rollouts in larger production environments	Command-line only, no graphical interface Works with Docker containers only
Self-hosted	Downloadable app
Open source	Open source
License: Apache-2.0	License not stated
No account needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

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