The Free plan offers: a completely public presentation published on the prezi.com website, with a prezi watermark. There is also 100 MB of storage space for the free account. This is enough to test the features of the program to determine whether or not it will fit your needs, but until you upgrade your plan, we do not suggest using any proprietary information in your presentations.
The Enjoy plan offers: the option to keep your presentations private or share them with clients, no watermark, and 500 MB of storage space for the account. This is perfect for those who want to use Prezi on a regular basis without having to keep the presentations public or for those who want to remove the watermark. There is also an offline player to allow the presentations to play offline. Pricing options are: $63.82 or £39 for a year, $25.93 or £15.9 for three months, or $162.02 or £99 for a three year license. (Conversions between £ and $ are approximate.)
The Pro plan offers everything from the Enjoy plan, along with 1.5 GB more storage space, a secure connection (to prevent data from being seen in transmission) and an offline editor. Pricing options are: $194.75 or £119 for a year, $63.82 or £39 for three months, or $487.64 or £299 for a three year license. (Conversions between £ and $ are approximate.)