ZimaOS vs CasaOS
Both made by Icewhale. CasaOS is a lightweight MIT-licensed Docker-app dashboard that runs on top of any Linux distro. ZimaOS is a complete operating system (evolved from CasaOS, bare-metal install, more advanced NAS features, closed source). For DIY-style homelabbers, CasaOS keeps the underlying OS swappable; for appliance-style users, ZimaOS is more polished but locks you into Icewhale's direction.
Icewhale maintains two related products targeting home-server users at different points on the DIY–appliance spectrum. ## CasaOS **CasaOS** — lightweight software layer that runs **on top of** an existing Linux distribution (Debian, Ubuntu, Raspberry Pi OS, etc.). Adds: - Web-based dashboard at host's IP - Docker app store (one-click installs for Jellyfin, Plex, Nextcloud, qBittorrent, Pi-hole, Vaultwarden, etc.) - Simple file browser - Basic network-share setup **License**: MIT, fully open source. `github.com/IceWhaleTech/CasaOS`. **Runs on**: any Linux host — Raspberry Pi, old laptop, VM, Ubuntu Server, Debian bare metal, cloud VPS. **Philosophy**: 'make Docker less painful.' You own the underlying OS; CasaOS is an optional dashboard. ## ZimaOS **ZimaOS** — complete operating system evolved from CasaOS, installed **bare metal** on an x86 machine (including Icewhale's own Zimaboard 2 hardware). Adds everything CasaOS has, plus: - Full VM manager - Software RAID (0 / 1 / 5 / 6 / JBOD) with GUI management - Full SAMBA / NFS / iSCSI server with GUI - 3-2-1 backup strategy support - Near-real-time backup sync - Managed ZFS / Btrfs / ext4 - Thunderbolt support - Nvidia GPU integration for AI / transcoding - Tighter integration with Icewhale hardware (Zimaboard 2 power management, etc.) **License**: **not fully open source**. This is the main philosophical objection from open-source-committed users. **Runs on**: x86 bare metal. Not designed to coexist with another OS on the same machine. **Philosophy**: 'replace your NAS appliance OS.' You get a complete managed stack; you don't pick the kernel, init system, or filesystem tooling. ## Decision heuristic | Criterion | CasaOS | ZimaOS | |---|---|---| | Want underlying OS control | ✅ | ❌ | | Want full NAS feature set OOTB | ❌ | ✅ | | Open source purity | ✅ (MIT) | ❌ (proprietary) | | Runs on Raspberry Pi | ✅ | ❌ (x86 only) | | Runs on non-Icewhale hardware | ✅ | ✅ (any x86) | | Supports your existing Debian/Ubuntu box | ✅ | ❌ (bare-metal install) | | Depth of NAS features (RAID, SMB/NFS GUI, VM manager) | shallow | deep | | Risk of vendor lock-in | low | real | ## For Zimaboard 2 owners Zimaboard 2 ships with ZimaOS. If you want open source, you can wipe and install Debian + OpenMediaVault + CasaOS and you keep most of what ZimaOS offered. Most reviewers report being pleasantly surprised by ZimaOS polish and choosing to keep it anyway. The board is x86 with standard UEFI — no lock-in at the hardware level. ## Related - Zimaboard 2 — the hardware - DIY vs Appliance Homelab Tradeoff — the broader decision pattern underlying this choice