Yes, we want to be as flexible as possible to suit companies of all shapes and sizes. So you might have a monthly plan for 50 users and if you need to increase that to 100 users for the duration of a project or reduce it when a project finishes, you can do that easily within the Proteus Admin Console.
If you want to upgrade from monthly to annual billing and get 2 months free, no problem. We cannot however provide refunds.
If you have any questions about your plan, please contact us on email@example.com