Cup

A lightweight tool with a web dashboard that checks your Docker containers for image updates.

FreeOpen sourceWebSelf-hostedCommand line
Official websitegithub.com

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About Cup

Cup checks whether newer versions of the container images you run are available. It can be used from the command line or through a web dashboard, and is built to be fast, using all available CPU cores to check many images quickly.

It is written in Rust and ships with a Dockerfile, so it can run as a container next to the ones it monitors. It suits home lab and self-hosting users who want to know when updates are out without updating anything automatically.

Strengths

  • Fast checks across many images
  • Web dashboard as well as a command-line mode
  • Runs as a container itself

Limitations

  • Reports updates but does not apply them
  • Maintained by a single developer

Details

Pricing
FreeFree and open source.
License
Open source, license not stated
Developer
sergi0g
Platforms
Web, Self-hosted, Command line
How it runs
Downloadable app, Self-hosted
Account
Not required
Best suited for
Self-hosters who want to see which containers have image updates
Categories
Container tools
Last verified
Added
Provenance
Facts checked against the developer's own pages and store listings, 1 sources on file.

Alternatives to Cup

Compare all

Software that can replace Cup for an important use case, and what changes if you switch.

  • What's Up Docker

    A self-hosted tool that watches your containers for image updates and can notify or upgrade automatically.

    FreeOpen sourceWebSelf-hosted

    What's Up Docker adds support for Compose, Swarm, Kubernetes and Nomad, over 30 notification triggers, and can update containers automatically instead of only reporting.

  • Diun

    A self-hosted tool that notifies you when container images you use get new tags or digests.

    FreeOpen sourceSelf-hostedCommand line

    Diun detects new tags and digest changes and sends alerts through notification services, but is configured by file with no web dashboard.

  • dockcheck

    A command-line script that checks Docker containers for image updates and can apply them.

    FreeOpen sourceLinuxCommand line

    dockcheck is a command-line script without a web dashboard that can apply Docker image updates, back up images first and prune old ones.

Similar software

Related functionality, not necessarily a direct replacement.

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