GitHub is often viewed as a "safe haven" for code, but it is also frequently used to host text files containing license keys for various software. Users look for these because:

These are simple text snippets. Developers often post universal keys (like the free Tier keys) or enterprise keys that have been publicly leaked.

: Users frequently share "bonus keys" or curated lists for versions like 5.5, 6.x, and 7.x.

If you require a license for ESXi 5.5 for educational or testing purposes in an isolated lab, the safest route is to register for a free VMware account and obtain the trial key directly from Broadcom (the current owner of VMware). For production environments, upgrading to a supported version (such as ESXi 7.x or 8.x) is strictly recommended.

To obtain a legitimate ESXi 5.5 license key, follow these steps:

For businesses, using keys from unauthorized sources can lead to massive fines during a software audit. How to Properly License Legacy ESXi