The average outbound list picks up 1–2% of the time. Ours picks up twenty times more often — because every number on it is a real person who actually answers their phone.
So why are we letting them spend it listening to a dial tone?
Lists rot. People change numbers, change jobs, change minds. The cheapest list is almost always the most expensive one to actually call.
The only number that has ever turned into revenue is one that someone actually answered. Everything else is a guess wearing a suit.
At $2.50 per number, MangoValidation pays for itself the first time your team skips a dead dial. After that it's just margin.