The Call That Doesn't Even Connect Still Doubles Your Email Reply Rate
Gong's 300-million-call dataset found prospects who got a cold call reply to the follow-up email at 3.44%, against 1.81% for email alone, even when the call never connected. That single number settles most of the calling-vs-email debate. Here's how to actually use it.
The "calling vs. email" debate usually gets framed as which channel is better, as if picking one means abandoning the other. Gong's analysis of over 300 million calls makes that framing look like the wrong question: prospects who received a cold call before a follow-up email replied to that email at 3.44%, against 1.81% for prospects who only got the email, nearly double, and the effect held even for calls that never got answered. An unconnected call still does something. It's the first "hello" that makes the second one, in writing, look less like a stranger's name in an inbox.
So the real question isn't which channel is better. It's which one to lead with for a specific account, and how to sequence the other one in behind it, because the data says you're leaving reply rate on the table any time you run either channel alone.
What cold calling is actually good at
A phone call gets you a real-time answer. You find out in the moment whether there's genuine interest, a real objection, or no fit at all, instead of waiting hours or days to find out an email landed flat. It's also harder to ignore than an email sitting in an inbox next to fifty others, which makes it a stronger tool for breaking through with a busy, senior, or hard-to-reach contact who'd otherwise never prioritize replying.
The tradeoff is effort and rejection: calls take real-time focus, and you hear every no as it happens, which is a harder skill to sustain than sending a batch of emails.
What cold email is actually good at
Email scales. You can reach far more accounts in the same hour than you could ever call, and it gives the prospect a moment to consider your message on their own time instead of reacting under the pressure of an unexpected call. It's also the better format for anything that benefits from being written down: a case study link, specific data, something they might want to forward to someone else internally.
The tradeoff is speed and visibility: most cold emails are ignored, not rejected, and you often never find out why.
How to actually decide
Lead with a call when: the account is high-value enough to justify the effort, you have a specific and timely reason to reach out, or the role you're targeting is unlikely to read cold email carefully (which is common the more senior the title).
Lead with email when: you're working a longer list where volume matters, the message benefits from something visual or written (a comparison, a case study), or you don't yet have a strong enough reason to justify interrupting someone's day with a call.
Why the strongest reps use both, in sequence
The two channels compound when they're sequenced instead of picked, and now there's a specific number behind it: a cold call, connected or not, nearly doubles the reply rate of the email that follows it. A short email before a call gives the prospect a flicker of familiarity with your name, which measurably softens a cold open. A call attempt after an unanswered email gives you a second, different way to reach someone who simply missed the first message, rather than assuming silence means no. Neither channel alone gets the benefit both give you together, which is really the answer to "which first": lead with whichever one your account or timing calls for, but never plan to run only one.
The part that doesn't change based on channel
Whichever one you lead with, the same underlying skill decides whether it works: being specific instead of generic, and sounding like a person instead of a script or a mass send. That's true of a cold call opener and it's true of a cold email's first line. Sharpening that skill on the harder channel, live cold calling, through daily drilling like DialDynamics is built around, tends to make the easier channel, email, better too, since the instinct for what's specific and what's generic transfers across both.