In Shipvio, you don't find any monthly fees.
You pay only in case you decide for concrete service of carrier for your demand.
You will choose the price and the carrier yourself, it's up to you. Prices are quoted without VAT. In the moment you choose carrier (by button "Order") you will be ask to fill all other details needed (f.e. contact persons) or in case you filled all details before, it's simply ordered. Your carrier have all information in the same time.
You will be informed about all movement of your shipment and also you can find all details at bookmark "Actual". Here, you will see all your shipments with the option to communicate with your carrier directly (Detail -> comments).