Google Apps is a service from Google, Inc. that allows organizations and businesses to customize and setup their own version of Google products such as Gmail, Google Docs, etc. under a custom domain.
Google Apps is the umbrella term and features three main options:
- Google Apps Free edition (Legacy) - Used to be named "Google Apps Standard" or just "Google Apps". At this time it's not available for new customers.
- Google Apps for Work - paid version with fee charged per account.
- Google Apps Ultimate - premium paid version.
- Google Apps for Education - free to schools and universities and combines features from both the Work and Ultimate versions.
Nonprofit and Government versions are also available.