Measure a voicemail by its downstream effects. Read it alongside the rest of the calling motion, then follow the account through its next contact, email response, and meeting outcome. Voicemail can change phone and email behavior in opposite directions. Gong reports connect rates of 5.17% after voicemails and 7.18% with voicemails.1 It also reports email reply rates rising from 2.73% to 5.87%.2
Set the measurement boundary
Separate delivery from response. A dial reaching voicemail records what happened on the call. Later contacts show whether the account moved.
Judge voicemail alongside other cold calling metrics by its downstream effects.3 Use meetings per 100 accounts touched as the outcome that settles the review, with separate views for accounts touched with voicemail and without voicemail.4 Keep callback rate as a supporting measure. It shows whether voicemail creates responses or simply adds activity.5
Define the boundary before reviewing results. The report should show whether a voicemail event occurred, what kind of event it was, what happened on the next attempt, whether the account replied by email, and whether the account reached a meeting. That keeps delivery volume from being mistaken for performance.
Separate delivery from response
Delivery measures show what the calling system did. Downstream measures show whether that action helped the account move.
Record these delivery fields separately:
- Voicemail is the count of outbound campaign calls that reached voicemail, and it is available only when answering machine detection is enabled.6
- Voicemail rate counts outbound campaign calls answered by voicemail against total attempted dials, and it is available only when answering machine detection is enabled.7
- Voicemail with beep rate counts outbound voice campaign contacts answered by voicemail with a beep against total attempted dials, and it is available only when answering machine detection is enabled.8
- Voicemail with no beep counts outbound voice campaign contacts that reached voicemail without a beep, and it is available only when answering machine detection is enabled.9
Before reading a rate, confirm that answering machine detection was enabled for the group being reviewed. Keep the beep and no beep categories visible so a change in detection or call handling does not look like a change in buyer response.
After each voicemail bucket is clear, read the outcome. A high voicemail count can mean the team reached many answering machines; it says nothing by itself about replies or meetings.
Build the account comparison
Add voicemail exposure to the account record. Then you can follow the same account through the next attempt, email activity, and meeting outcome.
Track voicemail to email reply rate and next attempt pickup rate as companion measures.10 Track meetings per 100 accounts touched with voicemail compared with accounts touched without voicemail.4 Keep the comparison at account level. A total callback count can rise because the team touched more accounts, even when the voicemail step had no effect. Account level rates show whether the outcome changed for the exposed group.
At review, check the next attempt, the email reply, and the meeting outcome. If the report cannot answer one of those questions, fix the measurement field before changing the voicemail strategy.
Interpret callback correctly
Callbacks are easy to count and easy to overvalue. Treat them as direct responses within the wider readout.
A callback from a random voicemail is becoming increasingly rare.11 The stated goals for a voicemail do not include getting the buyer to call back.12 Use callback rate to spot direct response, then inspect email replies, next attempt pickup, and meetings before deciding whether the voicemail worked.
Response volume does not show response quality. Voicemail responses are generally richer and show greater interest, even when another message type produces a higher response rate.13 The meeting measure captures whether the account gave the team a meaningful next step.
When callback rate is flat, check whether email replies or meetings moved for the voicemail group. When callback rate rises without movement in later outcomes, treat it as activity that needs more inspection.
Make the decision from downstream movement
Use the readout to decide whether the voicemail step earns space in the outbound sequence. Base the decision on outcomes you can trace to the account, with delivery fields available to explain the result.
Keep the step when the exposed group produces more useful downstream movement and the phone cost remains acceptable. Change the message or placement when delivery is steady while email replies, next attempt pickup, and meetings stay flat. Remove the step when your own comparison shows no downstream gain and the calling motion becomes harder to continue.
Set the callback target from your own program. The reported phone and email effects point in different directions, so the decision needs the full account path. Review the same fields after each meaningful change to the voicemail approach, and keep the exposure label intact so the comparison remains usable.
What not to do
- Review voicemail with other cold calling metrics and downstream effects; callback rate alone is insufficient.3
- Confirm that answering machine detection is enabled before calculating voicemail rate.7
- A missing callback does not prove that the voicemail had no effect, because random voicemail callbacks are increasingly rare.11
- Report voicemail activity separately from the outcome. The callback measure shows whether voicemail creates responses or simply adds activity.5