The short answer
In our audit of AI calls to a travel company's Meta leads, 19 to 22 Sep 2026, pick-up was highest at 14:00 IST, at 35%, and lowest at 19:00, at 18%. The 20:00 hour came next at 29%, with 17:00 and 18:00 in the middle at 26% and 27%. Yet 1,363 calls, about half of everything we placed, went out in the 18:00 hour. Crowding one hour did two kinds of damage. People who might have answered at another time were called when they were busy, and running that many calls at once pushed the voice provider past its concurrency limit, which billed a burst rate. For Indian paid leads, the practical answer is to call each new lead within minutes of the form, then spread any retries across the hours your own leads answer, inside a 10 am to 9 pm window, instead of releasing the backlog into one evening hour.
When did leads pick up, hour by hour?
These are the pre-sales qualifying calls from the audit, grouped by the hour the call was placed, in IST. The table shows the hours inside today's calling window.
| Hour (IST) | Calls | Pick-up |
|---|---|---|
| 14:00 | 251 | 35% |
| 15:00 | 141 | 21% |
| 17:00 | 303 | 26% |
| 18:00 | 1,363 | 27% |
| 19:00 | 90 | 18% |
| 20:00 | 156 | 29% |
The early afternoon did best and 19:00 did worst, a gap of 17 points. The evening then recovered at 20:00. The audit's hour table covers 14:00 to 20:00 inside the window, so it says nothing about mornings. If your leads come in overnight, measure your own mornings before you assume anything.
Read the rates as a ranking, not a promise. For these leads, 14:00 and 20:00 were the strongest hours inside the window and 19:00 was the weakest. That is enough to act on: move retries out of 19:00 and into the hours that answered, then check whether the ranking holds for your own leads.
Why is the 18:00 hour the real finding?
Not because of its pick-up rate, which was ordinary at 27%. Because 1,363 calls, about half of all calls, went out in that one hour. Calls were released in bulk rather than paced, so most of them landed at the same time. Everyone called in that hour who would have answered at 14:00 or 20:00 was called at the wrong time, and many of them then needed another attempt.
What did crowding one hour cost?
Money, as well as reach. The voice provider bills a higher burst rate above roughly ten simultaneous conversations. In the audit, that burst charge was about a quarter of voice spend. Pacing calls at about ten conversations at a time keeps them under that limit, so the same calls can be placed without the surcharge.
Does the hour matter more than calling fast?
No. The hour matters most for retries and backlogs. For a brand-new lead, speed comes first. more likely to qualify a lead when firms responded within an hour than when they waited longer (US study of 2,241 firms). (Harvard Business Review, “The Short Life of Online Sales Leads”, 2011.) A lead who filled a form a minute ago is expecting a call now. Call new leads at once, inside the calling window, and use the hour data to decide when to try again if they do not answer.
How did we measure pick-up?
- A call counted as picked up when its transcript had at least one line from the lead's side.
- That rule counted voicemail greetings and call screeners as pick-ups. Across the audit they inflated pick-up by about a third. We have not recomputed the correction hour by hour, so treat the rates as relative, not absolute.
- One customer, a travel company selling group trips from Meta lead forms, over four days. Other industries and lead sources may peak at different hours.
- Some hours are small. 19:00 had 90 calls and 15:00 had 141, so a few calls either way would move those rates.
What does Revvox do now?
- Calls go out only 10 am to 9 pm IST, Monday to Saturday. The rule runs in code on every dial.
- Calls are spread across the hours people answer and never crowded into a single hour.
- About ten conversations run at once, which keeps calls under the voice provider's burst rate.
- Two attempts at most per lead, so a missed hour does not turn into a day of repeat calls.
How do you find the best hour to call your own leads?
- Export the last few weeks of calls with the time each was placed and whether a person answered.
- Remove voicemail greetings and call screeners first, or every hour will look better than it is.
- Group by hour and count calls as well as pick-up. An hour with very few calls cannot tell you much.
- Check how evenly your calls are spread. If one hour holds half of them, fix the pacing before you read the rates.
- Move retries into your best two or three hours, and keep new leads on an immediate call.
- Repeat the check each month. Seasons, campaigns and audiences change when people answer.
What else did the audit find?
Source: Revvox calling audit, 22 Sep 2026: AI calls placed 19 to 22 Sep 2026 for one travel customer. Figures are from our own call log; shares and per-person ratios are our arithmetic on those counts. Written by The Revvox team.