Of course! You can purchase a Suite license, which will unlock one license per application in the Suite, and you can also purchase an additional license for one or more specific application(s), in particular if several users need to be able to use them at the same time.
Thus, for example, if one of your colleagues must have access to all Sarbacane applications in order to manage all of your digital communication, and another colleague must only have access to the Sarbacane Chat application to manage the chat bubble on your website, you would then take one Suite license (= one license / one access per application – you will need to assign each unlocked license to the first colleague) and one Sarbacane Chat license (= one access to Sarbacane Chat that you will assign to the second colleague).