Currently, the Cyrus project only distributes Cyrus IMAPd and Cyrus SASL as source code. If you prefer not to work directly with the source distribution - you don't have the time to learn it, find it too difficult, or it's otherwise unsuitable - there are a few other options.

There are a number of projects outside the main Cyrus project that provide easy-to-install packages of the Cyrus software. Additionally, there are a fair few commercial software packages that include the Cyrus software as a component. A partial list of these can be found on the ExternalLinks page.

Most people active on the info-cyrus mailing list appear to use the source distribution, so more people are likely to be familiar with that than any vendor-specific custom versions. Additionally, it can be easier to upgrade to the latest version if you're using the source packages. Finally - you learn more! In the end, the best way to get Cyrus depends on what your specific needs are.