Cost Per Lead (CPL)

Cost per lead is what you spend to get one qualified lead in the door.

Take the money you put into a channel, divide it by the leads it produced, and that's your CPL. It's the simplest way to compare channels: lower CPL means cheaper pipeline, as long as those leads actually convert.

Why it matters for the ChatGPT funnel

AI search is becoming a real source of buyers, but it's hard to price.

Most ChatGPT demand is invisible. People ask the assistant, get an answer, and never click — so you can't see the lead, let alone what it cost. That's the dark funnel problem: spend with no clean CPL to judge it by.

If you can't put a number on a channel, you can't scale it or defend the budget. AI search stays a guess instead of a line item.

How drio fits

drio turns that fuzzy AI-search demand into booked meetings inside the chat — and you only pay when a qualified lead actually lands.

Because billing is pay-per-lead, your CPL isn't a number you discover after the spend. It's a ceiling you set going in, with attribution back to the AI conversation that produced it.