Under the Free Plan, 25 workstation and 10 remote access clients are always free - you can start with those right now. For a Paid Plan, it depends how many clients you need and which types they are (i.e. server or workstation). Please use the quote form here and we will return a quote today.
You can have a Free Plan and/or a Paid Plan, but not a combination of both. This means that, if you want 35 licenses, you don't get the first 25 licenses for free and only pay for the remaining 10 - if you have a Paid Plan, you must pay for all licenses under that plan. However, you can have a Free Plan as well as a Paid Plan. This can be useful for testing purposes and is a common setup for customers.
For more information, refer to Licensing.