As an end-of-life product, VMware's license generator portal no longer issues new keys for version 5.5. The automated system was decommissioned in 2019.
If cost is your main concern and you need long-term free usage on older hardware, consider:
When you apply a free license key to ESXi 5.5, you lose the enterprise features found in the evaluation mode. The most significant restriction is the esxi 5.5 license key free
The VMware vSphere Hypervisor, commonly known as ESXi, was designed as a bare-metal hypervisor that installs directly onto your physical server. The free edition of version 5.5 was popular because it provided a robust entry point for virtualization without the heavy cost of enterprise licensing. However, the free version came with specific limitations, such as a maximum of two physical CPUs and a lack of support for vCenter Server integration.
As of early 2026, obtaining a "new" free license key for version 5.5 is virtually impossible through official channels. As an end-of-life product, VMware's license generator portal
Before the era of cloud-first subscriptions, VMware offered a free perpetual license for its standalone hypervisor
Download a virtual ESXi appliance from VMware and run it inside VMware Workstation Player (free for personal use). This is ideal for learning without worrying about host licenses. The most significant restriction is the The VMware
VMware still offers a completely free version of ESXi, but for current releases (v7 and v8):
When ESXi 5.5 was actively sold, VMware offered several editions:
Searching for "free license key" leads many to keygens, cracks, or shared keys. These are dangerous because:
While searching for an "ESXi 5.5 license key free" is understandable — especially if you need to revive old hardware or test legacy software — no legal free keys exist for this end-of-life product. Instead, use VMware’s current free hypervisor for modern environments, or switch to an open source alternative for older systems.