I have bought all of the email verifier tools on Appsumo over the last 3 years. Reon hands down is the best. It gives you the catch-all and rest of the categories you need to truly understand the statuses of your emails and get the most out of your list, versus chucking half of your list out of the window because another tool gives it an I don't know/risky status... There are limited leads, save yourself the headache, get Reoon, get the true status, and you get way more leads out of your list - worth the purchase!