Power dialers initiate as many calls as there are agents available, while predictive dialers call more people than agents available. Predictive dialers use an algorithm to “predict” how many calls they need to initiate in order to maximize talk time. This algorithm is based on multiple factors, such as the quality of the database and the behavior patterns of records.
When choosing between predictive vs power dialer, some factors to consider include the size and quality of your database, your script, the number of agents you have and the average call length of the campaign.