The standard version of the platform comes with the most common suggested components. The standard version is recommended for the majority of YMCAs. Once you have the Open Y platform, you can add any additional components you choose.
The extended version of the platform comes with a few more recommended components than the standard version. Similarly, once you have the Open Y platform, you can add any additional components you choose. It’s something you might have if you are working with a partner—we don’t recommend attempting to install the extended version without the support of a partner.
The custom version of the platform allows you to choose which components you include with your installation, and is typically used by contributing developers only.