If you're setting up outbound calling infrastructure, you'll run into these two terms fast — and vendors don't always explain the difference clearly, because the answer isn't always "buy the fancier one."
A power dialer calls the next number on your list the moment an agent goes available — one call per agent, in sequence. No call gets placed unless there's an agent free to take it, so there are no abandoned calls and no dead air. It's the controlled, predictable option.
Best for: smaller teams, compliance-sensitive campaigns, and any list where call quality matters more than raw volume — solo operators, small sales teams, and anyone who can't afford abandoned-call complaints.
A predictive dialer uses call statistics — average talk time, agent availability, historical connect rates — to start dialing multiple numbers before an agent is actually free, betting that by the time someone answers, an agent will be ready. Done well, it maximizes talk time on a busy floor. Done poorly (or on too small a team), it creates abandoned calls: someone answers and nobody's there to talk to them.
Best for: higher-volume floors with enough agents (typically 5+) to make the statistical pacing work without abandoning calls.
Start with power dialer if you're under 5 seats or compliance is a top concern. Move to predictive once you have the agent volume to support it responsibly — abandoned-call rates are regulated in most states, so predictive dialing done wrong isn't just bad CX, it's a compliance risk.
On PowerLine™, power dialer is available starting at Solo Seat; predictive dialer unlocks on Operator Desk, where the agent volume actually supports it.