Both stores types have a paid plan to use Syncio. See details below for how the plans work for each store type, as the type of plan and metric differs.
Destination stores (stores that need to sync inventory) pay a fixed subscription fee, depending on the products synced from a Source store. Destination Stores can also select optional add-ons.
Source stores (stores that hold the inventory to be synced) plan is performance based, depending on the number orders with synced products received from Destination Stores.
Universal Stores pay combined billing, more information here
For more details on pricing, please visit www.syncio.co/pricing.