Otter Free has no server limit and includes all of the features of Otter Enterprise, but gives all users unrestricted access.
Otter licenses included access to our support engineers through tickets and our community forums. In addition to Otter technical support, we can provide help debugging automation challenges and offer generalized DevOps advice from our years of experience.
Support for previous versions and upgrades to newer versions are also included.
Otter is licensed annually per the Otter End-User Licensing Agreement on a per-server basis; this license includes support and maintenance.
Otter is designed to create and manage servers (whether physical, virtual, or even nonexistant) in your environments, and is licensed by the approximate number of these you plan to configure in Otter. If you go over the maximum number allowed by your license, you will need to delete configured servers (which is quite easy), or request license extension.
The servers that the Otter web application is installed on does not count towards the limit, unless you explicitly add it as a managed server.