Cup vs Diun
A side-by-side comparison of two self-hosted automation & workflows options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Cup
Fast checker for available Docker image updates
VS
Diun
Notifier that alerts when Docker images receive updates
| Feature | Cup | Diun |
|---|---|---|
| Category | Automation & Workflows | Automation & Workflows |
| License | MIT | MIT |
| Language | Rust | Go |
| Setup difficulty | Easy | Easy |
| Min. RAM | 64 MB | 64 MB |
| Deployment | docker, binary | docker, binary |
| GitHub stars | ★ 1,337 | ★ 4,828 |
| First released | 2024 | 2019 |
| Replaces | Watchtower | Watchtower |
Why pick each one
Choose Cup if…
- Released under the MIT license
- Easy to set up — beginner-friendly
- First-class Docker support for quick deployment
- Active community (1.3k GitHub stars)
Frequently asked questions
Is Cup or Diun better?
Neither is universally better. Diun has the larger community; both share a easy setup difficulty, so the decision comes down to features and licensing.
Are Cup and Diun free and open-source?
Yes. Cup is licensed under MIT and Diun under MIT. Both can be self-hosted at no software cost.
Can I run Cup and Diun with Docker?
Cup: yes. Diun: yes.