KingSumo is a viral giveaways app that helps users increase the size of their email lists.
KingSumo + GoConvert
Use GoConvert and KingSumo to maximize the ROI of your sales and marketing spending. Enrich information in your KingSumo account, improve contact and deal information, and start visualizing marketing and sales performance. GoConvert works around the clock to automatically fill in missing data. Your insights get better all the time.