Is There a Minimum Commitment for QuotaGuard?

No. And Not Ever.

After the free trial, you will be billed for your first month of usage. 

If you cancel, your account will be removed and you will not be billed in the future.

To Cancel in One Click, please follow the steps outlined here : https://blog.quotaguard.com/how-to-cancel-your-quotaguard-subscription/