Dialer types, explained
Power dialer vs auto dialer vs predictive dialer: which do you need?
Short answer
A power dialer dials one number at a time with you on the line — best for B2B and the lowest compliance risk. A predictive dialer dials many numbers ahead of your reps to maximize talk time, but causes dropped calls and carries the heaviest rules. "Auto dialer" is the umbrella term, and under the TCPA it has a specific, narrow legal meaning. For most sales teams, the answer is a power dialer.
Power dialer
Dials the next lead automatically when you're ready and connects you the moment someone picks up. One call at a time, one rep. No dead air, because there's always a person on your end. It speeds up the boring part — looking up and dialing numbers — while keeping every conversation human. Because it pulls from a list you curate and doesn't generate numbers randomly, it generally falls outside the TCPA's definition of an autodialer.
Best for: B2B sales, SDR/AE outbound, recruiting, anyone who values conversation quality.
Predictive dialer
Dials multiple numbers ahead of your available agents, using an algorithm that predicts when a rep will free up, then routes answered calls to whoever's open. It maximizes talk time per agent — but when the math is off, a person answers and there's no rep available, producing the dreaded "hello… hello?" dead air (an "abandoned call"). The FTC's Telemarketing Sales Rule caps abandoned calls and requires connecting to a live rep within ~2 seconds, so it demands a real compliance program.
Best for: very high-volume B2C call centers with compliance staff.
Auto dialer (the umbrella term)
Colloquially, "auto dialer" means any system that dials for you. Legally, the TCPA targets an ATDS — equipment that stores or produces numbers using a random or sequential number generator and dials them. In Facebook v. Duguid (2021) the Supreme Court read that narrowly, so dialing from a specific, curated list is usually not an ATDS. The terminology matters because ATDS calls to cell phones without consent are where the biggest TCPA damages come from.
Side by side
| Power | Predictive | |
|---|---|---|
| Calls at once | One | Many (ahead of reps) |
| Dead air / dropped calls | None | Possible (regulated) |
| Conversation quality | High | Lower |
| Relative TCPA risk | Lower | Higher |
| Best fit | B2B / mid-volume | High-volume B2C |
General information, not legal advice — TCPA exposure depends on your specific setup and who you call.
DialSheet is a power dialer
One call at a time, auto-advance through your list, on your own Twilio — with built-in Do-Not-Call blocking so reps can't dial a suppressed number. Free and open source.
Start dialing freeCommon questions
Is a power dialer an autodialer under the TCPA?
Generally no. A power dialer dials one number at a time from a list you choose, with a human on the line — it does not use a random or sequential number generator, which is the definition of an autodialer (ATDS) the Supreme Court adopted in Facebook v. Duguid (2021). That makes a power dialer lower-risk than predictive or auto dialers, though you still have to follow DNC, consent, and calling-hour rules. This is general information, not legal advice.
What is the difference between a power dialer and a predictive dialer?
A power dialer dials one number at a time and only moves to the next when the rep is ready. A predictive dialer dials several numbers ahead of available reps and uses an algorithm to predict when an agent will be free, which maximizes talk time but causes dropped/abandoned calls and carries more compliance burden.
Which dialer is best for B2B sales?
For most B2B sales, a power dialer. It keeps the rep present and conversational, avoids the dead-air and abandonment problems of predictive dialing, and sits in a lower TCPA risk category. Predictive dialers make sense mainly for very high-volume B2C operations with the compliance program to support them.