using subscriptions as an online shop?

using subscriptions as an online shop?

Hi,
we're selling software products with one-time payment and also recurring models.
We're using an external billing system - so we dont want to use the invoicing process of Zoho - but we want to the system as a marketplace.

Means - a customer can subscripe to any products - without any billing process.

Is this possible or is there any other zoho product that fits to our needs?