Cold calling works better for people who answer their own phones and make decisions on the spot: owners of small shops, trades and restaurants. Cold email works better for people who sit at a desk, have a gatekeeper, and read their inbox in batches. Most businesses do best with both, email first and a call to the people who show interest.
I won't give you a success rate for either, because the figures floating around come from very different industries and can't be trusted for yours. Instead, here's how to choose by buyer, how to combine the two, and a one-week test that gives you your own numbers.
What each channel is good at
A phone call is fast and personal. In two minutes you can find out whether there's a need, hear the tone of the answer, and book a time. It's also interruptive: you're asking someone to stop what they're doing, which is why most calls to strangers end quickly.
An email is easy to ignore and easy to answer. The reader can respond at 9pm, forward it to a colleague, or look you up first. You can say something specific and give them time to consider it. It scales better, since you can write to forty people in the time you'd call ten, but a reply isn't guaranteed to come.
Who answers the phone
People whose phone number is on a sign, a truck or a Google listing answer calls for a living: the owner of a bakery, the manager of a small clinic, a lawn-care owner. They expect calls from strangers because customers call them. The best times are usually before the lunch rush or mid-afternoon, not during service.
People further up an organization usually don't. A facilities director at a hospital, a procurement manager at a school district or a finance lead at a mid-size company has a direct line behind a front desk or a screening assistant. Cold calls get screened out. If the front desk is your obstacle, how to get past the gatekeeper when cold calling gives you the exact words, and a sales call script for a local business owner covers the call itself.
Who answers email
Office-based buyers read email all day. A property manager, an HR director or an IT lead will skim a short, specific note between meetings and reply if it matches something on their plate. They often prefer it, since they can answer when they're ready and forward it to whoever owns the decision.
Email also reaches people who are hard to phone, like those who travel, work remotely, or sit in meetings. But their inboxes are crowded, so a vague message disappears. Short, specific and relevant is what gets a reply. For writing email that doesn't read as spam, cold email that is not spam has examples, and LinkedIn outreach versus email covers the third channel.
Combining both
The strongest pattern for most businesses is a short sequence:
- Day 1: a short email with one specific reason you're writing.
- Day 3: a follow-up with one new fact.
- Day 4: a call to anyone who opened the email twice or clicked a link, or to everyone on a small list.
- Day 8: a final short email, and a voicemail if you've called.
The call lands better after an email because the person has seen your name. "I sent you a note on Tuesday about inspection dates" is a warm opener compared with "Hi, you don't know me." And the email lands better after a call, since you can write "Following our short call." That's what combining means: each channel makes the other work.
Mind the rules for each. In the US, commercial email needs an accurate sender line, a postal address and a working opt-out (CAN-SPAM). Calls to numbers on the National Do Not Call Registry are restricted for consumer sales, and rules differ for business-to-business calls and by state; check yours. Texting needs prior consent (TCPA). Keep email volume modest, around 20 to 50 a day per inbox at first.
A one-week test
Let's say you sell commercial window cleaning, and your list is 40 people: 20 shop and restaurant owners, 20 office managers. Here's a fair test.
- Monday: email all 40 with the same short message.
- Tuesday: call the 20 shop owners. Don't call the office managers yet.
- Wednesday: follow up by email with the office managers. Call the shop owners who didn't pick up, once.
- Thursday: call the office managers who haven't replied.
- Friday: count.
For each group, count replies and conversations. You may find shop owners say yes on the phone and ignore email, while office managers reply by email and screen calls. Or the opposite. The point is to see which works for your buyer, not for buyers in general. With 40 people, the sample is small, so repeat with another 40 before trusting the result.
Here is how a result might read, with invented numbers. Of the 20 shop owners, 9 were reached by phone, 4 had a real conversation and 2 asked for a quote; only 1 replied to the email. Of the 20 office managers, 2 were reached by phone and none talked, while 5 replied to email and 3 asked for a quote. On those numbers the shop owners are a phone group and the office managers an email group, and you would write your next 40 accordingly. If both groups behaved the same, pick the cheaper channel in minutes and move on.
Time cost of each
Calls cost more minutes per contact. Ten calls, including the ones that go to voicemail, take 30 to 45 minutes. Ten emails written with a specific first line take about the same. The difference is in the follow-up: a second email takes a minute; a second call attempt takes five.
That's the main reason people drop calling. It's not that it fails, it's that nobody finds the time for the second and third attempt. If you want the routine as a daily block, see how to run outbound in 30 minutes a day, and for the question of who should be doing it, should founders do their own cold outreach.
What to log
One row per person. Columns: name, business, channel tried, date, outcome (no answer, voicemail, talked, replied), next step and date. At the end of the week add up outcomes by channel and buyer type. Without the log you'll remember the one good call and forget the nine silent ones.
Rocketship handles the email half on its own and the calling half in part. Its AI worker finds buyers by name, emails them from your own Gmail, follows up, answers replies and books the meeting, and Launch includes AI phone calls (30 voice minutes a month; a dedicated line is $5 a month). That leaves the calls where your voice matters for you. The guide to AI cold calling explains what the AI calls should and shouldn't be used for, and the AI workers page lists what each worker covers.
Pick the channel your buyer uses, then do the second one for the people who show interest. Rocketship finds the buyers, emails them from your own Gmail, follows up, and books the meeting on its own. Plans that get you customers start at $24.99 a month (Launch), and every monthly plan starts with a 7-day free trial, card required. Answering your existing number is included; a dedicated line is $5 a month.