Yes, the latest version of Pitch 'n Time is supported with Pro Tools 11.
For users who own and earlier version of Pitch 'n Time and would like to use it with Pro Tools 11, you will need to upgrade to the latest version of Pitch 'n Time before it will be compatible.
For more instructions on purchasing an upgrade for Pitch 'n Time, check out our blog post on upgrading your Pitch 'n Time license.