Tools: Diun vs Cosmos Cloud: Compared

Quick Verdict ## Overview ## Feature Comparison ## Use Cases ## Choose Cosmos Cloud If... ## Choose Diun If... ## Final Verdict ## Frequently Asked Questions ## Does Cosmos Cloud notify about updates like Diun? ## Can Diun trigger Cosmos Cloud to update? ## Which uses less resources? ## Related These solve different problems at different scales. Cosmos Cloud is a full self-hosting platform with container management, reverse proxy, and auto-updates. Diun is a lightweight notification service that tells you when container image updates are available. If you use Cosmos Cloud, you probably don't need Diun. If you use Portainer or Dockge for management, Diun adds valuable update awareness. Cosmos Cloud is an all-in-one self-hosting platform combining Docker management, reverse proxy with SSL, app marketplace, VPN integration, security features, and automatic container updates. Current version: v0.20.2. Diun (Docker Image Update Notifier) is a single-purpose tool that monitors Docker registries for new image versions and sends notifications via 20+ providers (Discord, email, Slack, Gotify, etc.). It does not apply updates — notify only. Current version: 4.31.0. Cosmos Cloud replaces the need for Diun by including update management built-in. If you're already invested in Cosmos Cloud, adding Diun is redundant. Diun's value is in setups where you use separate tools for management and proxying. Diun fills the "update awareness" gap that Portainer and Dockge don't cover natively. Its notify-only approach is also safer than automatic updates — you stay in control of when updates happen. (Watchtower, which offered auto-updates, is now deprecated.) Cosmos Cloud shows available updates in its UI but doesn't have Diun's 20+ notification provider integrations. If you need Discord/Slack/Gotify notifications specifically, Diun is more flexible for notification delivery. Not directly. Diun is notify-only — it doesn't integrate with container management tools to trigger updates. You'd need to apply updates manually through Cosmos Cloud's UI after Diun notifies you. Diun by a wide margin (~15 MB vs ~200 MB). But that's an unfair comparison — Cosmos Cloud does 10x more things than Diun. Templates let you quickly answer FAQs or store snippets for re-use. Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink. Hide child comments as well For further actions, you may consider blocking this person and/or reporting abuse - You want one platform for management, proxy, and updates - You want automatic update application (not just notifications) - You're setting up a new self-hosting environment - You want an app marketplace and user management - You already have a management stack (Portainer, Dockge, etc.) - You prefer to be notified but decide when to update manually - You want notifications in specific channels (Discord, Slack, Gotify) - You need lightweight resource usage (~15 MB vs ~200 MB) - You monitor images across multiple registries (GHCR, ECR, etc.) - How to Self-Host Diun with Docker - How to Self-Host Cosmos Cloud - Watchtower vs Diun - Portainer vs Cosmos Cloud - Best Docker Management Tools - Updating Docker Containers Safely