Every operating system covered so far in this History series (TrueNAS, Proxmox VE, OpenMediaVault) shares one trait: all three are free and open source, built by communities or foundations that give away their code. Unraid breaks that pattern. It has been a paid, closed-source product since its very first release, and that one decision shaped almost everything else about how the company behind it grew, priced its software, and built its features. It’s a good reminder that not every homelab favorite started out as an open-source labor of love. This one starts with a guy who just wanted somewhere to put his DVDs.
A DVD collection that wouldn’t fit on one drive
Unraid’s origin traces back to a single forum post. On August 26, 2005, a user posting under the handle “limetech” announced a new network-attached storage server product called “Un-RAID” on AVS Forum. That user was Tom Mortensen, and by his own and Lime Technology’s account, the project began as a personal, “beer money” side project. Mortensen had ripped a sizable DVD collection onto hard drives and needed a reliable way to keep expanding that storage without buying a matched set of drives or rebuilding an entire array every time he ran low on space.
That constraint is what gave the software both its name and its defining feature. A conventional RAID array stripes data across a fixed set of identically sized drives; add a mismatched disk and you generally can’t use it without rebuilding the whole array. Unraid inverted that model with a parity-protected array that lets you mix drive sizes and brands, add capacity one disk at a time, and lose a single drive without losing data, all without the strict striping that RAID, and later ZFS pools, depend on. It’s a deliberately different tradeoff: slower than striped arrays for some workloads, far more forgiving for a hobbyist with a drawer full of mismatched drives.
A niche NAS tool with a loyal following
For the rest of the 2000s and into the early 2010s, Unraid stayed close to what it started as: a hobbyist project with a devoted forum community rather than a commercial product with a marketing budget. Early adopters ran it on repurposed desktop hardware, compared notes on which SATA controllers behaved best, and leaned on community-built add-ons, like the unMenu web interface, before Unraid shipped a plugin system of its own. It’s the kind of slow, forum-driven growth that shaped several NAS projects born in that same mid-2000s window, including the software that eventually became TrueNAS. Our History of TrueNAS covers that parallel story from the open-source side of the NAS world, if you want the comparison.
Lime Technology solidified as a company during this stretch, but Unraid itself remained, in practice, a storage-only tool: an array manager and a web interface, and not much else. That changed with version 6.
Docker, KVM, and the pivot from storage box to hosting platform
Unraid 6, released in 2015, is the version that turned a NAS operating system into something closer to a full homelab hypervisor. The release replaced Unraid’s earlier, more limited Xen-based virtualization support with KVM, giving users a proper VM Manager for running complete guest operating systems alongside the parity array. In the same release cycle, Unraid overhauled its Docker support, adding a real web interface for managing containers instead of requiring command-line setup. Almost overnight, the same box holding your parity array could also run a Windows VM, a media server, and a stack of Docker containers, all from one browser tab. It’s much of the same territory Unraid still competes on today.
Unraid 6 in three moves: Xen support gives way to KVM for virtual machines; Docker gets a proper web interface instead of a command line; and GPU passthrough turns a storage box into a gaming and transcoding machine.
Timing helped, too. That same year, Unraid added GPU passthrough, letting a single machine dedicate a graphics card to a virtual machine, useful for gaming VMs and hardware-accelerated transcoding alike. By Lime Technology’s own telling, that feature is what caught the attention of Linus Tech Tips, whose coverage put Unraid in front of a far bigger audience than its own forum could ever reach and, by their account, changed the direction of the company. A storage niche product suddenly found itself competing for some of the same audience as Proxmox VE and other virtualization-first platforms, even though Unraid’s core array architecture stayed storage-first.
Always for sale — the one thing that never changed
Here’s the through-line that connects all twenty years of this story: Unraid has never had a free tier. Where TrueNAS, Proxmox VE, and OpenMediaVault all give away their core software and, in TrueNAS’s and Proxmox’s cases, sell support or enterprise features on top, Unraid has charged for a license since day one. From that first 2005 build onward, running Unraid has required a paid license key tied to a USB flash drive, with the boot device doubling as the dongle. For most of the product’s history, that meant three tiers, commonly known as Basic, Plus, and Pro, priced mainly by how many storage devices a server could attach, sold once as a perpetual license with updates included for life.
That model held for close to two decades before Lime Technology restructured it. On March 27, 2024, the company replaced Basic, Plus, and Pro with three new tiers (Starter, Unleashed, and Lifetime) and, more significantly, capped included software updates at one year for the two cheaper tiers, with an optional annual fee required to keep receiving new versions afterward. Existing Basic, Plus, and Pro holders kept lifetime update access under the old terms; only new purchases moved to the new structure. The change stirred real debate inside the community at the time. It’s also a useful data point for anyone weighing Unraid’s total cost of ownership against free alternatives in our TrueNAS vs Unraid comparison: with Unraid, the license fee is basically the entire cost conversation, in a way it simply isn’t with its open-source rivals.
From a one-person side project to a real company
Lime Technology stayed small and largely invisible as a business for most of its first decade, with Tom Mortensen building and supporting Unraid largely on his own, backed by community moderators filling in the gaps. That changed gradually after the Docker and KVM pivot, and the attention spike from GPU passthrough, gave the business room to grow: 2018 and 2019 brought key hires and a broader rebrand, and in 2019 Mortensen’s daughter, Tiffany Jones, joined as co-CEO to help run the company alongside him. Lime Technology now operates as a remote-first team spread across seven-plus countries, headquartered, at least on paper, in San Diego, California, and serving Unraid users in more than 150 countries.
Where Unraid stands two decades later
Unraid OS 7.0 shipped in January 2025, and it’s arguably the most significant release since the 2015 Docker and KVM pivot: it added native ZFS support alongside the traditional parity array, a rebuilt web interface, and an improved VM manager with snapshot and cloning support. Adding ZFS is a notable move for a product whose entire identity was built on being the non-striped, non-ZFS alternative. It doesn’t replace the classic Unraid array, but it does mean Unraid can now offer the same filesystem that underpins TrueNAS and much of the wider NAS world as an option, rather than a reason to look elsewhere.
Twenty years after a forum post about a DVD collection, Unraid is still a family-run business by industry standards, still charges for every license, and is still, fundamentally, the same idea Tom Mortensen described in 2005: take whatever drives you already own and turn them into one flexible array. If you’re weighing that approach against the rest of the field, the full Unraid overview breaks down current pricing and specs, and our homelab setup guide is a good starting point for deciding which storage philosophy fits your hardware in the first place.