http://epicmarketingstudio.com/our-infusionsoft-review. Infusionsoft is a marketing automation system for small businesses. Infusionsoft serves over 10,000 small businesses and more than 39,000 users worldwide. Review of Infusionsoft by Epic Marketing Studio gives some very handy insights to the pros and cons of this system. Highly recommended reading for any business who plan to make an informed decision for Infusionsoft.