Number of lists that you can add on a account depends on your subscription. 
 
The free plan supports 2 lists, All in one Basic supports 10 lists, All in one Growth supports 50 lists, All in one Pro supports 100 lists.
 
Please visit https://www.engagebay.com/pricing/all-in-one to compare our plans. Once you are on the page, scroll down to see all the features that each plan supports.