# Diun

> MIT notifications when Docker images update

**Category:** Notifications  
**Pricing:** open-source  
**URL:** https://crazymax.dev/diun/  
**GitHub:** https://github.com/crazy-max/diun  
**Added:** 2026-10-18

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## The Hook

Diun watches container images and notifies you when a new tag or digest appears, so you hear about base-image updates, app releases and security rebuilds without checking every registry by hand.

## What's Good

MIT (crazy-max/diun), release v4.33.0 (2026-05-30), maintained since 2017, with commits this month. Runs as a single Go binary or a Docker image, reads from your container platforms and config files, and notifies through the services you already use. ★~5k.

## The Catch

It only notifies; it does not update containers the way Watchtower does. The release cadence is a few a year. You still need to decide which updates are safe.

## Verdict

A lightweight way to know when your self-hosted images have updates.