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CU

Cup

Fast checker for available Docker image updates

Automation & Workflows ★ 1.3k stars Easy setup MIT

Cup is a lightweight tool written in Rust that checks your Docker containers for available image updates. It offers a CLI, a web dashboard, and a JSON API for integration with monitoring systems.

Official siteSource code

Key features

  • Fast update checks
  • Web dashboard and CLI
  • JSON API
  • Very low resource use

Strengths

  • Released under the MIT license
  • Easy to set up — beginner-friendly
  • First-class Docker support for quick deployment
  • Active community (1.3k GitHub stars)

Cup replaces

Self-hosted Watchtower alternatives

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