Dialer types, explained

Power dialer vs auto dialer vs predictive dialer: which do you need?

By Abhi Chawla, founder · Last updated September 20, 2026

Five words get used for “software that dials for you”, and they are not interchangeable: they describe how many calls are placed per rep and who is on the line when someone answers. That difference decides your answer rate, your compliance exposure and, further down the page, your bill.

Short answer

“Auto dialer” is the umbrella term for software that dials for you, and the types differ in how many numbers they call for each free rep. A power dialer calls one number at a time, so a rep is ready for everyone who answers and the compliance risk is the lowest; a predictive dialer calls several numbers per free agent to maximize talk time, drops some of the people who answer, and carries the heaviest rules. A small team calling businesses or owner lists, where every hello matters, should use a power dialer, and DialSheet is one: it runs on your own Twilio account, free for one person up to 500 calls a month and 500 leads, then $29 a month for the first seat and $29 for each teammate.

Under the TCPA, “auto dialer” also has a specific, narrow legal meaning, and a power dialer working down a list you uploaded generally falls outside it. A progressive dialer is a power dialer that never pauses, and a parallel dialer opens several lines for one rep and connects the first person who answers. Predictive dialing belongs on large consumer call floors with staff to watch the abandoned-call rate. DialSheet has no predictive mode, and its parallel dialer tops out at four lines.

TL;DR — our pick, and we build it

If you call businesses or owner lists, alone or as a small team, the type you want is a power dialer, and DialSheet is the one to buy: free for one caller on your own Twilio account, and the only one of the five types on this page that never leaves a person listening to dead air.

1 lineper rep is what a power dialer opens, so there is always a human on your end when someone answers. A predictive dialer opens several per free agent and abandons the calls it cannot staff, which is why the FTC caps abandoned calls at 3% of a campaign over 30 days.
$0is DialSheet’s software bill for one caller up to 500 calls a month and 500 leads, power dialer included, so the whole cost at that cap is about $7 of Twilio usage. The 500-call cap lasts about 3 working days at 150 dials a day.
$210a month is three reps at 150 dials a day, all in: $87 of software ($29 a month for the first seat and $29 for each teammate) and about $41 a rep of Twilio. The same three on PhoneBurner’s annual plans, which bundle the dialing, list at ~$420–$549.
2–4 linesis the parallel mode, a $19/month per seat add-on on Pro, for the lists that mostly ring out. It is the cheapest way to try multi-line dialing without an enterprise contract; a dedicated parallel dialer such as Orum lists at ~$250+/user/mo.
about 8,200calls in the 30 days to August 26, 2026 is what A two-person US property acquisition team made on DialSheet, about 195 per person per working day, one line at a time. Published production numbers, not a projection.

Pick something else if you run a floor of full-time agents calling large consumer lists, with someone whose job is keeping abandoned calls under the FTC’s 3% cap (a predictive dialer on a suite such as Five9, a full contact-centre platform with a stated 50-seat minimum and the implementation that implies); your reps need more than four lines each (a dedicated parallel dialer such as Orum, at ~$250+/user/mo); or you want a recorded message played to a list with no rep on the line (a voice-broadcast auto dialer, which DialSheet is not). A small team calling businesses or owners from its own list is in none of those groups.

One line per rep, in practice: the dialer places the call, you talk, a number key logs the outcome and the next lead is already ringing. Watch on YouTube.

What is a power dialer?

A power dialer is software that dials the next lead automatically when you are ready and connects you the moment someone picks up. One call at a time, one rep. No dead air, because there is 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 does not generate numbers randomly, it generally falls outside the TCPA’s definition of an autodialer.

Best for: B2B sales, SDR and AE outbound, recruiting, anyone who values conversation quality.

What is a predictive dialer?

A 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 is open. It maximizes talk time per agent, but when the maths is off a person answers and there is no rep available, producing the “hello… hello?” dead air of an abandoned call. The FTC’s Telemarketing Sales Rule caps abandoned calls at 3% of answered calls per campaign over 30 days and requires connecting to a live rep within two seconds of the greeting, so it demands a real compliance program.

Best for: very high-volume B2C call centres with compliance staff.

What is an auto dialer? (the umbrella term)

Colloquially, “auto dialer” means any system that dials for you, so a power dialer is a kind of auto dialer. 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.

Progressive dialer and parallel dialer: the other two you will see

Progressive dialer

One line per rep, like a power dialer, but the next call is placed automatically the instant the previous one ends, with no preview pause. Vendors use “power” and “progressive” loosely; many power dialers have a progressive mode. Same compliance profile as power dialing.

Parallel dialer (triple dialer, 10-line dialer)

Several lines open at once for a single rep, connecting the first human who answers and dropping or screening the rest. Roughly triples dials per hour on low-connect lists, burns numbers faster, and when two people answer together one of them is abandoned. DialSheet’s parallel mode opens two to four lines with voicemail screening.

Parallel dialing, the mode between power and predictive: two to four lines for one rep, voicemail screening on the ones that are not a human. A $19/month per seat add-on on Pro, on your own Twilio account. Recorded on 2026-09-17; the managed-line option it mentions was withdrawn later that day. Watch on YouTube.

Side by side: power vs auto vs predictive vs progressive vs parallel

	Power	Progressive	Parallel	Predictive
Lines per rep	One	One	Two to ten	Many, across the team
Who triggers the dial	Rep, or a short auto-advance	Automatic, no pause	Automatic burst	Pacing algorithm
Dead air / abandoned calls	None	None	When two answer at once	By design; capped at 3%
Conversation quality	High	High	Medium	Lower
Relative TCPA / TSR risk	Lower	Lower	Medium	Higher
Numbers burned	Slowest	Slow	Fast	Fastest
Typical software price	Free to ~$183/user	Free to ~$183/user	~$250+/user/mo	~$95–199/agent+
Best fit	B2B, mid-volume	B2B, steady lists	SDR teams on big low-connect lists	High-volume B2C

General information, not legal advice; TCPA and TSR exposure depend on your setup and who you call. Prices are approximate September 2026 list prices: the power ceiling is PhoneBurner’s top annual plan, the predictive range is BatchDialer’s annual per-agent pricing.

Which dialer should you use?

You call businesses, your list is under a few thousand rows, and each conversation matters: a power dialer. This is most B2B outbound, recruiting, accountancy and agency work. Nothing else improves your day.
Your reps spend most of the hour listening to ringing on a large, low-connect list: add parallel dialing, two or three lines, with voicemail screening on. Budget the extra numbers first; three lines reach the per-number ceiling three times faster.
You run a room of full-time agents calling consumers all day and you have someone whose job is compliance: predictive dialing, on a contact-centre platform priced for it.
You are choosing between “auto dialer” products: ask how many lines it opens per rep and what happens when two people answer at once. Those two answers tell you which row of the table you are buying.

Which dialer type is best for a team?

The team case is arithmetic before it is anything else: the per-seat dialers charges the same rate for your tenth rep as your first, so 10 seats is $500 a month, while DialSheet is $29 for the first seat and $29 for each one after it, $290 in all, a difference of $210 a month that widens every time you hire. What that buys is a product built for teams: assign leads to reps, or let the team work a shared pool, a caller ID per rep, pinned to that rep, shared call scripts, so a new hire opens the same way as the floor, a team dashboard: assigned, connected, meetings booked, no-answers and talk time per rep, over any date range.

assign leads to reps, or let the team work a shared pool
a caller ID per rep, pinned to that rep
shared call scripts, so a new hire opens the same way as the floor
a team dashboard: assigned, connected, meetings booked, no-answers and talk time per rep, over any date range
CSV export of the whole stats table
invite by email with seats managed in one place

Which power dialer should you actually buy?

Our opinion, and we are not neutral

We build DialSheet, so weigh this accordingly. Having priced every dialer in this category line by line: for a team whose day is dialing a list, DialSheet does the same core job as PhoneBurner, with power dialing, call recordings and transcripts, AI call summaries, a built-in CRM and parallel dialing on a $19/month per seat add-on, and it costs about $210 a month for three reps at 150 dials a day, Twilio included, against ~$420–$549 on PhoneBurner. It is also moving faster (we shipped 251 changes across 15 releases in the 30 days to September 8, 2026) because the people using it are the ones asking for the changes. Where it loses to PhoneBurner is narrow and specific, and it is listed below rather than buried. The teams running on it are published with their numbers at dialsheet.io/customers: a 12-seat UK accountancy practice that put a nine-rep calling floor live in a day, a two-person US acquisition team sustaining about 8,200 dials a month, a solo funding desk at 1,335 calls last month, and an insurance agency at about 1,000 calls a month, retained month over month.

DialSheet Free

One person calling a list. No software bill up to 500 calls a month and 500 leads, so the whole cost at that cap is about $7 of Twilio usage on a number you own. The power dialer and auto-advance are on the free plan; parallel lines are not.

DialSheet Pro

A small team calling businesses or owners. $29 a month for the first seat and $29 for each teammate: about $210 a month for three reps at 150 dials a day, with their Twilio usage. Power dialing comes on every plan and 2–4 line parallel dialing is a $19/month per seat add-on, with lead assignment, a caller ID per rep and per-rep stats.

A predictive suite such as Five9

A consumer call floor with compliance staff. Predictive dialing maximizes talk time on a big floor, at the cost of abandoned calls that someone has to monitor. Five9 is a full contact-centre platform with a stated 50-seat minimum and the implementation that implies, and DialSheet has no predictive mode at all.

A dedicated parallel dialer such as Orum

SDR teams that want more than four lines per rep. Orum lists ~$250+/user/mo. Answer detection above four lines is a different product, and the specialists do it better; DialSheet stops at four.

Screenprint illustration of the inside of a telephone exchange, four cables rising from a floor socket toward a tall window with a village church and a telephone pole outside, a flat green sun in the top pane and a wall of switchboard jacks on the right

Who runs on it

Production numbers on our own customer pages, a customer's account of it on their own site, and a third-party listing. Follow any of them.

Common questions

What is a power dialer?

A power dialer is software that dials the next number on a list automatically the moment a rep is ready, one call at a time, with the rep on the line for every call. It removes the dead time of looking up and typing numbers but never places a call there is no human to take, so there is no dead air for the person who answers. It is the standard tool for B2B outbound, SDR teams, recruiters and small sales teams, and because it dials from a curated list rather than generating numbers, it generally sits outside the TCPA’s definition of an autodialer. DialSheet, which we build, is a browser power dialer of this kind, free for one person on your own Twilio account up to 500 calls a month and 500 leads.

What is the difference between a power dialer and an auto dialer?

Colloquially, “auto dialer” is the umbrella term for any software that dials for you, and a power dialer is one kind of auto dialer. Legally, the terms diverge: the TCPA regulates an ATDS, equipment that stores or produces numbers using a random or sequential number generator, which the Supreme Court read narrowly in Facebook v. Duguid (2021). A power dialer that works down a list you uploaded does not generate numbers, so it is generally not an ATDS, while the “auto dialers” of the robocall era often were. When someone asks for an auto dialer for sales, they almost always mean a power dialer.

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 the available reps and uses an algorithm to predict when an agent will be free, which maximizes talk time per agent but produces abandoned calls whenever a person answers and no rep is free. Predictive dialing therefore carries a compliance burden: the FTC’s Telemarketing Sales Rule caps abandoned calls at 3% per campaign over 30 days and requires a live rep within two seconds of the person’s greeting. Predictive suits high-volume B2C call centres with compliance staff; power suits everyone else.

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, and 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, calling-hour and state-law rules, and some states define autodialers more broadly than federal law. This is general information, not legal advice.

What is the difference between a predictive dialer and an auto dialer?

A predictive dialer is the most aggressive kind of auto dialer: it places more calls than there are agents, timed by a pacing algorithm, and routes answered calls to whoever is free. A plain auto dialer, in the older sense, dials a list and plays a recording or connects an agent one call at a time, without predicting agent availability. In practice the market has settled on three tiers: power (one call per rep), progressive (one call per rep, placed automatically when the rep finishes the previous one) and predictive (several calls per rep, paced by an algorithm). Predictive is the only one of the three that routinely abandons calls.

What is a progressive dialer, and how is it different from a power dialer?

A progressive dialer places the next call automatically as soon as the rep finishes the previous one, with no pause for the rep to preview the record; a power dialer usually lets the rep see the lead and trigger the dial, or auto-advances after a short set delay. Both are one call per rep, so neither abandons calls. Vendors use the words inconsistently, and many products sold as power dialers have a progressive mode. The distinction that matters is pacing: one line per rep (power or progressive) versus many lines per rep (predictive or parallel).

What is a parallel dialer, and is it the same as a predictive dialer?

A parallel dialer opens two to ten lines at once for a single rep and connects the rep to the first human who answers, dropping or screening the rest; some vendors call this a triple dialer or a 10-line dialer. It is not the same as predictive: predictive paces calls across a team and routes answers to any free agent, while parallel dialing serves one rep and abandons the other lines that connect at the same moment. Parallel dialing roughly triples dials per hour but burns through numbers faster, since every extra line is another call against the same per-number ceiling, and it raises the same abandoned-call questions as predictive when two people pick up together.

Are power dialers illegal?

No. A power dialer dials numbers from a list you supply, one at a time, with a rep on the line, which is legal in the United States and in the UK. What is regulated is how you use it: the TCPA restricts autodialers that store or produce numbers with a random or sequential number generator, and the Supreme Court read that narrowly in Facebook v. Duguid (2021), so a list-based power dialer generally falls outside it. You still have to scrub the national and state Do Not Call registries, honour opt-outs, stay inside calling hours, and follow state rules that define autodialers more broadly than federal law does — Florida and Oklahoma among them. Predictive dialing is the type that carries the heavier burden, because the FTC’s Telemarketing Sales Rule caps abandoned calls at 3% per campaign. This is general information, not legal advice.

How many types of dialer are there?

Five names are in common use and they describe two things: how many lines are open per rep, and whether a rep is on the line when someone answers. A preview dialer shows the record and waits for the rep to press dial. A power dialer dials the next number automatically when the rep is ready, one line per rep. A progressive dialer is the same one line per rep but never pauses between calls. A parallel dialer opens two to ten lines for a single rep and connects the first human who answers. A predictive dialer opens several lines per free agent across a whole team and paces them with an algorithm, which is the only one of the five that routinely abandons calls. “Auto dialer” is the umbrella over all of them, and also a narrower legal term under the TCPA.

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. Parallel dialing is worth it once a rep’s day is mostly unanswered dials on a large, low-connect list. Predictive dialers make sense mainly for very high-volume B2C operations with the compliance program to support them.

Which power dialer should a small sales team use?

A small team calling businesses or owner lists should use a power dialer with a parallel mode for the lists that mostly ring out, and DialSheet, which we build, is one. It dials one lead at a time on every plan, adds 2–4 line parallel dialing as a $19/month per seat add-on on top of Pro, and runs on the team’s own Twilio account, so three reps at 150 dials a day pay about $210 a month in total: $87 of software ($29 a month for the first seat and $29 for each teammate) and about $41 a rep of Twilio usage. PhoneBurner, a per-seat power dialer with the dialing bundled, lists ~$140–183/user/mo (annual), or ~$420–$549 a month for the same three reps. Two readers should buy something else: a consumer call floor big enough for predictive dialing (a suite such as Five9, which is a full contact-centre platform with a stated 50-seat minimum and the implementation that implies), and reps who need more than four lines each (a dedicated parallel dialer such as Orum, at ~$250+/user/mo).

What does a power dialer cost compared with a predictive or parallel dialer?

Power dialers run from free to about $183 a user a month. DialSheet is free for one person on your own Twilio account up to 500 calls a month and 500 leads, then $29 a month for the first seat and $29 for each teammate, with calls billed by Twilio at ~$0.014/min for US outbound; PhoneBurner lists ~$140–183/user/mo (annual) with the dialing bundled. Parallel dialers built for SDR teams, such as Orum, list at ~$250+/user/mo, while DialSheet includes 2–4 parallel lines in Pro. Predictive dialing is sold per agent: BatchDialer, a predictive multi-line dialer, lists ~$95–199/agent/mo (annual; $119–249 monthly), and Five9 is a full contact-centre platform with a stated 50-seat minimum and the implementation that implies. Telephony scales with dials rather than with the dialer type: one rep at 150 dials a day is roughly $41 a month of Twilio, and the same rep at 400 dials a day on three parallel lines is roughly $106.

Is there a free power dialer?

Yes. DialSheet is a browser power dialer that runs on your own Twilio account, free for one person up to 500 calls a month and 500 leads, and at that cap the whole bill is about $7 a month of Twilio usage for both call legs and one local number. The free plan includes the power dialer with auto-advance; parallel dialing, unlimited calls and leads, and in-app call recordings and transcripts need Pro, at $29 a month for the first seat and $29 for each teammate. The free plan does not stretch to a full-time caller: the 500-call cap lasts about 3 working days at 150 dials a day.

General information, not legal advice. Court decisions and FTC rules are summarised; confirm the current position with counsel for your states.