Hi there - thanks for the question. The Marketing Cloud is a collection of Adobe's digital marketing solutions, each can be used separately, and they certainly don't have to be purchased together. I would suggest chatting to one of our sales team to find out if there is a usage level that fits your budget. You can visit this page http://www.adobe.com/solutions/digital-analytics.html and use the links at the bottom of the page, or you can call 877-722-7088
Hope that helps
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