: A standalone license with no expiration but limited features (e.g., no vCenter management, no backup APIs). Paid vSphere Editions
Running such an old version today poses critical security risks as it no longer receives security patches, bug fixes, or hardware support. Blog Post Draft: The Risks of Legacy Virtualization vmware esxi 55 license key 14k
That night, with the cluster humming peacefully, Amir opened a terminal and spun up a test VM. He named it “14k” in a private joke and watched a tiny virtual server boot. In the logs, he added a comment: “Restored 2026‑04‑09 — thanks, Liza.” He felt, absurdly, as though he had rescued something living. : A standalone license with no expiration but
: There is no longer a restriction on the amount of physical RAM installed in the host server. He named it “14k” in a private joke
: Users would register on the VMware website to receive a unique serial number for the "vSphere Hypervisor" (the free version of ESXi).
. While it was a popular choice for older hardware, current users and reviewers strongly recommend migrating to newer versions or alternative solutions due to the lack of bug fixes and security support. Licensing Overview vSphere 5.5 Free version licensing - physical CPU's limit
– VMware officially ended support for ESXi 5.5 on September 19, 2018. Using it today poses significant security and compatibility risks.