Power Dialer vs Predictive Dialer (and Preview): Which Fits?
Power dialer vs predictive dialer vs preview: a decision matrix by list quality, deal size and team size, plus when to switch dial modes mid-campaign.
In the power dialer vs predictive dialer choice, a power dialer calls one lead per available agent, while a predictive dialer calls several at once and connects agents only to the calls that are answered. Power suits smaller teams and proven scripts; predictive suits large lists, low connect rates and a full floor. Preview dialing, where the agent researches before each call, suits high-value accounts. The right mode depends on the list, the team and the deal, and it can change halfway through a campaign.
This guide explains each dial mode in plain English, gives you four questions that point to the right one, and ends with a decision matrix you can save and reuse every time a new list lands.
What is the difference between a power dialer and a predictive dialer?
A power dialer places the next call only when an agent is free, so every answered call has someone waiting. A predictive dialer places several calls per agent, which produces more conversations per hour but risks a person answering with no agent available. Preview, super power and outbound AI fill in the gaps around them.
Preview
The agent sees the lead record first, reads the notes and clicks to place the call. Nothing dials until the agent is ready. It is the slowest mode, but the agent walks into every conversation prepared.
What the agent experiences: research, dial, talk, wrap up, repeat. Plenty of control, plenty of time per lead.
Power
The dialer places the next call automatically as soon as the agent finishes wrap-up. The agent no longer chooses who to call or presses dial; the list moves on its own.
What the agent experiences: steady back-to-back calls, with ringing and voicemail time still in the mix.
Super power
A faster take on power dialing. The next lead is dialled the moment an agent becomes free, so the gap between conversations shrinks further. It suits teams with a proven script who want more talk time without moving to full predictive.
What the agent experiences: very little downtime; the next call is already on its way.
Predictive
The dialer places several calls per available agent, expecting most will not be answered, and connects agents to the calls that are. It produces the most conversations per hour on large lists, but it is also the mode where a person can answer and find no one there.
What the agent experiences: calls arrive already connected. The lead record pops up as the conversation starts, so there is no time to prepare.
Outbound AI
An AI voice agent places the calls, holds the first part of the conversation and hands interested leads to a person. No human is on the line until the handoff.
What the agent experiences: fewer, warmer conversations with leads who have already agreed to talk.
Which four questions pick the right dial mode?
List quality, deal value, team size and your tolerance for idle time and risk decide the mode. Answer them in that order.
- How good is the list? A fresh, opted-in list with valid numbers connects often. An old or purchased list connects rarely. Low connect rates make preview painfully slow and make predictive pay off; high connect rates make predictive risky, because more people answer than you have agents.
- What is each deal worth? If one account is worth a five-figure contract, a rep should spend five minutes on research before calling. If each sale is small and similar, speed matters more than preparation.
- How many agents are dialling at once? Predictive needs a group of agents to spread connected calls across. With two reps, a single unexpected answer can leave a caller waiting. With twenty, the dialer has more room.
- How much idle time can you tolerate, and how much risk? Preview has the most idle time and the least risk of a dropped call. Predictive has the least idle time and the most risk. Power and super power sit in between.
Compliance sits on top of all four. Whatever mode you choose, calling hours, do-not-call lists and consent still apply to every call. Our TCPA calling hours and DNC checklist covers the checks to run before each dial.
Power dialer vs predictive dialer vs preview: which fits your campaign?
Use preview for high-value accounts, power or super power for proven scripts on small and mid-sized teams, predictive for large low-connect lists with a full floor, and outbound AI to screen big or stale lists. The matrix below maps common scenarios.
| Scenario | Recommended mode | Why |
|---|---|---|
| High-value B2B accounts, a few dozen per rep per day | Preview | Research before the call is worth more than speed. |
| Warm inbound leads that asked for a callback | Preview or power | Connect rates are high; you want a prepared, prompt follow-up. |
| A new list you have not worked before | Preview, then power | Learn the objections and fix the script before speeding up. |
| A proven script and a small team of 2 to 5 reps | Power | Removes manual dialling without the dropped-call risk of predictive. |
| A proven script, steady list, team that wants more talk time | Super power | Shortest gap between calls short of predictive. |
| Large consumer list, low connect rate, a full floor of agents | Predictive | Many lines per agent makes up for the many unanswered calls. |
| Large list where most leads need a quick qualifying question first | Outbound AI | An AI agent screens the list and hands interested leads to reps. |
| Re-engaging old leads who may no longer be interested | Outbound AI or power | Low expected interest; save rep time for people who respond. |
Two rules of thumb: the higher the deal value, the slower the mode; the bigger the floor and the weaker the list, the faster the mode.
What happens when a call connects and no agent is free?
The dialer either hangs up, plays a voice drop or sends the person to an IVR, and you choose which. It is the most important setting in predictive dialing, and the one teams most often leave on the default. It can also happen in other automated modes when an agent is slow to come back from wrap-up.
- Hang up. The simplest, and the worst experience for the person who answered. They hear silence, then nothing.
- Play a voice drop. A short recorded message plays, for example identifying your business and how to reach you.
- Send to an IVR. The caller hears a menu and can press a key to wait, request a callback or opt out.
There is a compliance side. Under the FCC's rules in 47 CFR 64.1200, a telemarketing call that is not connected to a live sales representative within two seconds of the person's greeting counts as abandoned. Abandoned calls are capped at 3% of live-answered calls per campaign over a 30-day period, and when no rep is available the rules expect a prerecorded message that identifies the seller and offers an automated way to opt out. The FTC's Telemarketing Sales Rule has similar provisions. This is not legal advice; read the rules and confirm your setup with counsel.
In practice: set the predictive ratio conservatively, choose a voice drop or IVR over a silent hang-up, and make sure the message identifies your business and gives a way to opt out. In Phonify you choose per campaign whether to hang up, play a voice drop or send to an IVR when no agent is free. Predictive campaigns dial at the ratio you set; the ratio does not adjust itself, so review it as answer rates change.
Where does outbound AI dialing fit?
Outbound AI works best as the first pass on a list, not as a replacement for reps. The AI agent calls, asks a few qualifying questions and passes interested people to a rep, so reps spend their time on conversations that are already warm.
Set three things before the first AI call:
- Disclosure. The agent should say it is an AI at the start of the call. The FCC has ruled that AI-generated voices are "artificial" voices under the TCPA, so consent rules for artificial-voice calls apply.
- Handoff rules. What makes a lead "interested", and who takes the transfer.
- Limits. How long a call may run and where it goes if the agent gets stuck.
Our AI voice agent setup checklist walks through each one.
When should you switch dial modes mid-campaign?
Switch once the campaign has taught you something: start in preview to learn the list, move to power when the script works, and go faster only if the list is large and connect rates are low. A campaign is not locked to its first mode.
- Week one: preview. Reps learn the list, note the objections and tighten the script.
- Once the script works: power or super power. Remove manual dialling and let the list move.
- If the list is large and connect rates are low: predictive, with a conservative ratio and a voice drop or IVR for unstaffed connects.
- For the long tail: outbound AI to re-check leads that never answered a rep.
When you switch, keep everything else the same: caller ID, script, dispositions and the callback queue. If you change the mode and the script in the same week, you will not know which change moved your numbers. Consistent caller ID also matters for answer rates; see our guide to local caller ID and "spam likely" labels.
Phonify sets the dial mode per campaign (preview, power, super power, predictive or outbound AI) and lets you switch a campaign's mode without rebuilding it. Agents see the lead, the script and the softphone on one screen, wrap-up opens when the call ends, and scheduled callbacks wait in a queue with a "Call now" button. Sales teams usually start with power and super power dialing for sales teams, while larger floors look at predictive campaigns for call centers. Dialer campaigns start on the Pro plan, super power and predictive cost $0.015 per connected minute, and calls nobody answers are not charged; see dialer pricing per connected minute.
Frequently asked questions
Is a predictive dialer better than a power dialer?
Not in general; it depends on the list and the team. A predictive dialer produces more conversations per hour on large lists with low connect rates, but it needs a full floor of agents and carries the risk of abandoned calls. A power dialer is slower but safer, and usually the better fit for small teams with a proven script.
What is a preview dialer used for?
A preview dialer is used when each conversation is worth preparing for. The agent sees the lead record and notes first, then clicks to place the call, so nothing dials until they are ready. It suits high-value B2B accounts, warm callbacks and brand-new lists where reps are still learning the objections and refining the script.
How many agents do you need for predictive dialing?
There is no single number, but predictive dialing needs a group of agents to spread connected calls across. With two reps, one unexpected answer can leave a person waiting with nobody on the line. Larger teams give the dialer more room. Small teams usually get better results from power or super power dialing with a proven script.
What is an abandoned call in predictive dialing?
An abandoned call is a telemarketing call that is not connected to a live sales representative within two seconds of the person's greeting, under the FCC rules in 47 CFR 64.1200. Abandoned calls are capped at 3% of live-answered calls per campaign over 30 days, and a prerecorded message must identify the seller and offer an opt-out. This is not legal advice.
Can you change dialing modes in the middle of a campaign?
Yes, and many teams should. A common path is preview in week one to learn the list, power or super power once the script works, predictive if the list is large with low connect rates, and outbound AI for leads that never answered a rep. Keep caller ID, script and dispositions the same so you can measure the change.
