Cold-Call Voicemail Callback Rate

• Orum's callback outcome is a prospect calling back within seven days after the original outbound call, not a rep reaching the prospect on a later dial✓. 1
• InsightSquared defines a different operational ratio: callbacks received divided by voicemails left✓. State which denominator you use. 3
• A voicemail is only possible after an unanswered call reaches a voicemail service. Praxum's separate UK-trades study illustrates that many unanswered calls simply rang out, but it does not measure callbacks✓. 4

1. What Orum actually measured

Orum's article describes 733,000 calls made from January through March 2022 and prospect callback behavior within seven days of a pre-recorded voicemail✓. It reports a 2.277% callback rate after outbound calls without a voicemail and a 2.538% rate after calls where a rep left a pre-recorded message✓. The difference is 0.261 percentage points; Orum presents it as an 11.462% relative improvement. Those two ways to express the difference are not interchangeable. 1

The study population was calls made using Orum, not a random sample of every B2B team. Its quoted methodology does not give the number of unique prospects, segment mix, individual message content or random assignment between voicemail and no-voicemail groups. Orum says it used a chi-square test with p below 0.00001✓. Statistical separation in a large observational dataset does not establish that voicemail caused the difference. Reps may choose to leave messages for prospects who differ in other ways. 1

There is also an evidence-access limitation for this article: the Orum page's body appeared in a first-party search result when captured, but a direct page-open request failed. The figures should be independently re-opened or confirmed from Orum before publication. This is why the post remains in QC even though the captured excerpts and fact ledger match exactly.

2. A callback is not a later pickup

Orum separately describes 7.8 million platform calls from June 2021 through March 2022 to examine pickup on the next call after a voicemail✓. It reports a 3.2% next-call pickup rate without a voicemail and 4.1% after a pre-recorded voicemail✓. Those numbers describe a later outbound attempt by the rep being answered. The prospect did not necessarily initiate a return call. 1

Do not put the 4.1% next-call pickup figure into a table headed 'voicemail callback rate.' It uses a different time sequence and a different action. It also comes from a different Orum sample and period than the 733,000-call seven-day callback comparison. Keeping the two analyses separate prevents an apparently precise but false answer. 1

Gong's own cold-call article says it analyzed more than 300 million calls and describes callbacks as rare✓. The cited Gong passage does not supply a matching seven-day callback numerator and denominator. It therefore cannot validate or replace Orum's 2.538% figure. A larger dataset is not automatically a better source for a metric it did not publish. 2

3. Decide which denominator answers your question

InsightSquared's experiment guide defines callback ratio as callbacks received divided by voicemails left✓. That is intuitive for evaluating the messages that were actually deposited. Orum's cited comparison, by contrast, describes rates for groups of outbound calls with and without voicemail✓. The denominators are not obviously identical. If a call reaches a mailbox but no message is left, it belongs in an outbound-call analysis but not in a left-message denominator. 13

For a team dashboard, publish both. First, the message-level callback rate: unique return calls from eligible prospects within seven days, divided by confirmed voicemails left in the cohort. Second, the attempt-level callback yield: unique return calls from eligible prospects within seven days, divided by eligible outbound call attempts. State whether repeat messages to the same person are counted once or multiple times. Record the time of deposit and the exact observation window for every message.

A call that reached voicemail is not the same as a voicemail left. Praxum recorded 1,371 outbound calls over 38 days to UK trade businesses✓. In its classified unanswered calls, 216 reached voicemail while 431 rang out without reaching it✓. That study does not tell us whether those callers left messages or received callbacks. It only demonstrates why a dial count, voicemail-service count and deposited-message count must not be collapsed into one denominator. It is also a UK-trades reachability sample, not a SaaS-prospect callback sample. 4

4. Design the event log before running an experiment

Give every outbound attempt a stable call ID. Record account, contact, caller, local time, phone-number type, call outcome and whether a message was actually deposited. If deposited, record whether it was live or pre-recorded, the script variant, duration and a timestamp. Orum's callback data specifically concerned pre-recorded voicemails✓. Do not generalize it to every live-spoken message without a test. 1

Link each inbound return call to the earlier voicemail, with a clear rule if the prospect received several calls or messages. InsightSquared explicitly recommends tracing callbacks to the original voicemail in the CRM✓. A callback from an existing customer, an unrelated inbound inquiry or a prospect responding to a later campaign should not be attributed to a voicemail solely because one was left earlier. 3

Fix the follow-up window in advance. Orum used seven days in its callback analysis✓. Your team might report both 24-hour and seven-day windows, but the denominators and cohorts must remain consistent. If the last messages in a weekly report have only been observed for one day, the seven-day rate is incomplete. Wait for the cohort to mature, or label it provisional. 1

5. Test a voicemail strategy without claiming causation

Assign comparable eligible prospects to voicemail and no-voicemail workflows where operationally feasible. Keep the caller, audience, time of day, prior touches and later follow-up rules balanced. If reps choose whom to message, selection can explain an apparent difference. Do not compare a new campaign with a prior quarter and assume the voicemail caused every change.

Report the absolute callback difference, not only the relative lift. For Orum's historical figures, 2.538% versus 2.277% is a 0.261-point gap✓. A relative percentage can sound large while the absolute number of additional callbacks is small. Include the counts behind each rate and an uncertainty interval for your own experiment. 1

Callback is not the final business outcome. InsightSquared advises looking downstream to opportunities and deals before adopting a voicemail approach across the team✓. Add answered callbacks, useful conversations, meetings and pipeline to the reporting chain. A message that provokes many 'please stop calling' returns may have a high callback rate but poor commercial and buyer-experience value. 3

6. What should you do in 2026?

Use Orum's early-2022 seven-day result as one historical, vendor-specific comparison, not as your forecast✓. Use Gong's much larger cold-call corpus only for the outcomes it actually discusses, not for an unstated callback percentage✓. Then measure a new cohort in your own audience with confirmed message deposits and linked return calls. 12

If callbacks are not the primary goal, state that explicitly. Track the desired conversation or meeting separately. Above all, avoid using 'response rate,' 'next-call pickup' and 'callback rate' as interchangeable labels. They describe different actions by different people, over potentially different windows.

FAQ

How we researched this

We captured Orum's first-party 2022 study text, Gong's voicemail article, InsightSquared's voicemail-experiment guide and Praxum's UK reachability study on October 1, 2026. We kept callback, future pickup and voicemail availability in separate sections because their populations and denominators differ. Orum's direct article could not be reopened after its indexed page body was captured, so its exact figures remain a publication-verification hold. No rate here is presented as a representative 2026 market average.

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Modern Inbound can help define call outcomes, voicemail attribution and useful follow-up for a research-led outbound program. Discuss a measured outbound system, or email [rish@moderninbound.com](mailto:rish@moderninbound.com).