Providing blockchain-based subscription-as-a-service management is disclosed. In one example, a node within a customer network begins execution of a subscription-as-a-service software instance. An activation agent of the node broadcasts an activation transaction, requesting activation of the subscription-as-a-service software instance, to other nodes of the customer network. A block-issuing node within the customer network, upon receiving the activation transaction, determines whether to activate the subscription-as-a-service software instance. If so, a block-issuing agent of the block-issuing node generates a blockchain block containing the activation transaction as part of a blockchain. The blockchain block is then broadcast back to the customer network, where it is eventually received by the node executing the subscription-as-a-service software instance. Based on the blockchain block, the node enables continued execution of the subscription-as-a-service software instance. At the end of a billing period, the blockchain may be used to generate an invoice to a subscribing customer.